book of abstracts - ieftinici · mr. catalin adomniței – phisycs faculty, al. i. cuza university...

AdvPhotoCat2015 The 1st International Workshop “Advances on Photocatalysis”

Iasi, Romania, 6 – 8th of July, 2015

Book of abstracts

-2015 -

AdvPhotoCat2015

The 1st International Workshop “Advances on Photocatalysis”


1

International organizing committee

Event Chair Dr. Mirela Suchea – Chemistry Faculty, Al. I. Cuza University, Romania

Dr. Carlos Jose Tavares, Physics Department, University of Minho, Guimaraes, Portugal

Prof. Martyn E Pemble – Chemistry Dpt., University College of Cork, Ireland

Conf. Dr. Alin Dirtu – Chemistry Faculty, Al. I. Cuza University, Romania

Prof. Dr. Felicia Iacomi – Physics Faculty, Al. I. Cuza University Romania

Dr. Alexandra Mocanu – Faculty of Applied Chemistry and Materials Science,

“Politehnica” University of Bucharest Romania

International Scientific Comitee

Prof. Dr. Ionel Mangalagiu – Chemistry Faculty, Al. I. Cuza University Romania

Prof. Nikos Katsarakis, – CEMATEP, TEI of Crete, Greece

Dr. Dimitra Vernardou - CEMATEP, TEI of Crete, Greece

Dr. Gian Luca Chiarello - Dep. of Chemistry, Università degli Studi di Milano, Italy

Prof. Declan McCormack - Dublin Institute of Technology (DIT) and Centre for Research

in Engineering Surface Technology (CREST), Ireland

Prof. Dr. Aurel Pui – Chemistry Faculty, Al. I. Cuza University Romania

Prof. Dr. Eng. Ioan Calinescu – Faculty of Applied Chemistry and Materials Science

Department of Bioresources and Polymer Science, University “Politehnica” of Bucharest,

Romania

Local organizing committee members:

Mrs. Gabriela Paula Adomniței -volunteer, FEAA, Al. I. Cuza University Romania

Mr. Catalin Adomniței – Phisycs Faculty, Al. I. Cuza University Romania

Mr. Stefan Bucur – Chemistry Faculty, Al. I. Cuza University Romania

Dr. Daniela Dirtu - Chemistry Faculty, Al. I. Cuza University Romania

Dr. Petronela Dorneanu – Petru Poni Institute of Macromolecular Chemistry, Iași,

Romania

Dr. Maria Ignat – Chemistry Faculty, Al. I. Cuza University Romania

Mr. Ioan-Valentin Tudose – Chemistry Faculty, Al. I. Cuza University Romania

Mrs. Angela Vatra – Chemistry Faculty, Al. I. Cuza University Romania

Mr. Vasile Vatra – Chemistry Faculty, Al. I. Cuza University Romania

Mr. Constantin Virlan – Chemistry Faculty, Al. I. Cuza University Romania

Dr. Narcisa Vrinceanu - Chemistry Faculty, Al. I. Cuza University Romania

www. photocatalysis-workshop.com

Website design: Dragoș Duțu – Alexandru Ioan Cuza University of Iași, Romania

AdvPhotoCat2015



2

Table of contents

Table of contents .......................................................................................................................... 2

Improved high temperature stability of anion doped TiO2 photocatalysts ................................ 4

TiO2 nanotube arrays photonic crystals: a way of manipulating light for increased

photocatalytic H2 production ....................................................................................................... 5

Photocatalytically active building materials: Powerful tools against air pollution? ........... 6

Fabrication and application of different TiO2-based composite photocatalytic materials with

specific structural and morphological features ........................................................................... 7

TiO2 as a general purpose electron-conducting protection layer for water splitting

photoelectrodes ............................................................................................................................ 8

Solar-activated controlled release of compounds from polymeric microcapsules

functionalized with photocatalytic nanoparticles ....................................................................... 9

Kinetics and Mechanism of Air Toxics Photocatalytic Degradation on synthesizedmetal-

doped TiO2 nano-powders. Indoor and Outdoor Applicability. .............................................. 10

Fast Synthesis and Characterization of CdSe Colloidal Quantum Dots for Photocatalytical

Applications ............................................................................................................................... 11

Mediating oxidation state of plasmonic gold grown on layered double hydroxides matrices for

UV and solar driven photocatalysis ........................................................................................... 12

First-principles studies of metal nanoparticles and semiconductor nanoribbons with metallic

edges ........................................................................................................................................... 13

Effect of Mn doping on the structure, photocatalitic and sensing properties of nanostructured

titanium oxide powders and thin films ...................................................................................... 14

Silver Nanoparticles Influence on Photocatalytic Activity of Hybrid Materials Based on TiO2

P25 .............................................................................................................................................. 15

EFDEN 4C – The first research center for comfort conditions in Romania, the first house full

certified living building challenge in Europe ............................................................................ 16

Extracted TiO2 as novel catalyst for photocatalytic reduction of carbon dioxide.................... 17

Removal of antibiotics from wastewater using photocatalytic membranes ............................. 18

Hydrothermally Grown TiO2 for Self-Cleaning Applications .................................................. 19

Photocatalytic ZnO on textile substrates for air purification applications .............................. 20

ZnO and TiO2 nanostructured onto polymeric samples with enhanced photocatalytic

behavior ..................................................................................................................................... 21

Degradation of organic compounds from industrial pharmaceutical effluent through

advanced oxidation processes .................................................................................................... 22

Polysulfone membranes doped with polymer colloids for water decontamination .................. 23

Correlations between structural information and antimicrobial performance of fibrous

supports surfaces ....................................................................................................................... 24

AdvPhotoCat2015



3

Synthesis and characterization of ZnO-SnO2nanocomposites and photocatalytic degradation

of Rhodamine B dye ................................................................................................................... 25

Photocatalytic performance of TiO2 on inorganic polymeric matrices .................................... 26

Cr doped TiO2 thin films ........................................................................................................... 27

Photocatalysis: General concepts and examples ....................................................................... 28

Thickness influence on physical properties of TiO2 and Ti(Nb)O2 thin films .......................... 29

Surface recombination processes in silicon with nanostructured porous layers formed by

photocatalysis ............................................................................................................................. 30

Encapsulated Co(II) homodinuclear coordinative compound with terephthalate bridge for

styrene catalytic oxidation ......................................................................................................... 31

Flexible electroconductive layers as current collectors for photovoltaic and

photoelectrochemical devices ..................................................................................................... 32

Development of novel multilayered textile support for organic solar cells .............................. 33

List of participants ..................................................................................................................... 34

AdvPhotoCat2015



4

Improved high temperature stability of anion doped TiO2 photocatalysts

Declan E. McCormack,a,b*Rachel Fagan,a,b Steven J. Hinder,

c and Suresh C. Pillai,d

aCentre for Research in Engineering Surface Technology (CREST), FOCAS Institute, Dublin Institute of

Technology, Kevin St, Dublin 8, Ireland bSchool of Chemical and Pharmaceutical Sciences,

Dublin Institute of Technology, Kevin St., Dublin 8, Ireland

cThe Surface Analysis Laboratory, Department of Mechanical Engineering Sciences, University of Surrey,

Guildford, Surrey, GU2 7XH, United Kingdomd Nanotechnology Research Group, Department of

Environmental Sciences, Institute of Technology Sligo, Ireland

*Presenting author;[email protected]

Among the three commonly occurred phases (anatase, rutile, and brookite) of TiO2, the

anatase form is reported to be the best photocatalyst due to the improved charge-carrier

mobility and the greater number of surface hydroxyl groups.1-3 The anatase to rutile

transition in titania photocatalysts usually occurs at a temperature between 500 °C to 700

°C.1-2Development of a high temperature stable (above 1000 °C) anatase phase is

important for various environmental applications (e.g self-cleaning ceramic tiles, anti-

microbial sanitary wares etc). 2-3As part of a programme to develop functional

photocatalysts, our studies were aimed at developing anion doped (e.g. N, S) photo-

catalytically active ceramic coatings for various applications (such as antibacterial self-

cleaning building materials). The photocatalytic anatase phase stable up to the processing

temperature of the ceramic substrates (e.g., bathroom tile, sanitary ware, etc.) is most

desirable for these applications. High temperature anatase stability up to 900 °C was

reported in the previous studies.1-2 In the current investigation, the effect of anionic dopants

such as nitrogen, fluorine and phosphorous (N, F and P) for improving the high

temperature stability of anatase TiO2 using ammonium hexafluorophosphate as a single

source dopant (method A) and urea, trifluoroacetic acid and phosphoric acid as multiple

sources (method B) were undertaken. Method A was seen to produce a more stable anatase

phase, 100 % at a temperature as high as 1000 °C (and 68% anatase even at 1100 °C) when

compared to method B which showed 100 % rutile phase at 900 °C. Kinetic analysis shows

a marked increase in the photocatalytic degradation using materials calcined at 1100 °C for

method A (0.042 min-1) compared to that for method B (0.005 min-1) with commercial

photocatalyst Evonik-Degussa AEROXIDE® sample exhibiting a rate of 0.031 min-1 when

this material was calcined to 1100 °C. XPS results indicated that the only dopant detected

at high temperatures is phosphorous in its P5+ form. Lattice and surface phosphorous is

believed to contribute to the enhanced properties of doped TiO2 by acting as trapping sites

to capture the electrons in the conduction band leading to an enhanced photocatalytic

activity due to the increased electron-hole separation.

1. P. Periyat, D.E. McCormack, S.J. Hinder, S.C. Pillai, J. Phys. Chem. C 113 (2009)

3246-325

2. P. Periyat, S.C. Pillai, D.E. McCormack, J. Colreavy, S.J. Hinder, J. Phys. Chem. C 112 (2008) 7644-7652.

3. S. Banerjee, S.C. Pillai, P. Falaras, K.E. O’Shea, J.A. Byrne, D.D. Dionysiou, J. Phys.

Chem. Lett. 5 (2014) 2543-2554.

mailto:[email protected]

AdvPhotoCat2015



5

TiO2 nanotube arrays photonic crystals: a way of manipulating light for

increased photocatalytic H2 production

Gian Luca Chiarello*, Alessio Zuliani, Elena Selli

Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy

*corresponding author [email protected]

Photoelectrochemical cells (PECs) are the most promising devices for solar energy harvesting and

storage, leading to water cleavage with separate H2 and O2 production. Fabrication of suitable, stable and active photoelectrodes is the crucial task for the future development and application of

such devices. Self-assembled, vertically oriented TiO2 nanotubes (NTs) thin films, directly grown

on a conductive supporting material by electrochemical anodization, represent an attractive, cost-effective and extremely valid preparation method of photoanodes for PECs [1]. Their well-

organized architecture provides: i) efficient percolation pathways for vectorial photopromoted

electron transfer, ensuring a more effective charge separation, ii) large internal surface area which

guarantees enhanced photon absorption and reactant adsorption on the photocatalyst surface, and iii) optimal adhesion of the photoactive film to the conductive support ensuring high stability and

improved electron transfer [2]. Moreover, the ordered 2D structure of the NT array confers them

the photonic crystal properties due to the periodic modulation of the refractive index [3]. This provokes the formation of a photonic band gap (PBG), i.e. a range of forbidden wavelengths in

certain directions that cannot propagate through the structure due to Bragg diffraction and

scattering. Furthermore, the group velocity of the light slowing down at the frequency edges of the PBG generates the so called “slow photon effect”. Hence, the PBG can be exploited to confine,

control, and manipulate photons with the ultimate goal to intensify light absorption.

The NTs physicochemical properties and morphology, together with the PBG position, can be

easily tailored by controlling the preparation parameters such as the anodization time, the applied DC voltage, the electrolyte composition and the thermal post-treatment conditions. In particular,

the applied potential affects the NT inner diameter that is the main structural parameter governing

the PBG position, as confirmed by theoretical calculation and UV-vis diffuse reflectance spectroscopy.

We present here the results obtained with a series of

self-assembled TiO2 NT arrays grown by electrochemical

anodization on a metallic titanium substrate, which were prepared with different anodization times (from 10 min

up to 4 h) and applied potentials (30 to 80 V) in 8 M H2O

+ 0.2 M HF in ethylene glycol electrolyte solutions, and post-calcined at 450°C. The so obtained thin films were

characterized by SEM, XRD, DRS analyses and tested as

photoanodes in Incident Photon to Current Efficiency (IPCE) measurements and in a two compartment PEC [4]

for separate H2 and O2 production (see Figure).

The photocatalytic performance significantly increased with increasing the applied potential (i.e.

with increasing the NT inner diameter). IPCE measurements revealed that such unexpected behavior is due to a red shift of the activity threshold ascribed to the parallel shift of the PBG

position. This demonstrates the important role played by ordered hierarchical structures in

improving the photocatalytic performance by confining and manipulating light.

References

[1] M. Altomare, M. Pozzi, M. Allieta, L.G. Bettini, E. Selli, Appl. Catal. B Environ. 136 (2013) 81.

[2] G.K. Mor, O. Varghese, M. Paulose, K. Shankar, C. Grimes, Sol. Energy Mater. Sol. Cells. 90 (2006)

2011.

[3] J.I.L. Chen, G. von Freymann, S.Y. Choi, V. Kitaev, G.A. Ozin, J. Mater. Chem. 18 (2008) 369.

[4] E. Selli, G.L. Chiarello, E. Quartarone, P. Mustarelli, I. Rossetti, L. Forni, Chem. Commun. (2007) 5022.

h

PtTiO2

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O2

Nafion 117


AdvPhotoCat2015



6

Photocatalytically active building materials:

Powerful tools against air pollution?

Ralf Dillert Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover

Callinstr. 3, 30167 Hannover, Germany

[email protected]

The contamination of the ambient air in urban areas is a significant burden on human

health. Therefore, attempts are made to reduce the concentration of hazardous air

pollutants by various technical measures. Since some years photocatalytically active

building materials such as paints, plasters, tiles, and cement-based products are available

on the market. They are advertised with the arguments to be self-cleaning and to contribute

to air purification.

To determine the activity of these building materials, various standardized test methods are

available, which are based on the photocatalytic conversion of inorganic (nitrogen(II)

oxide) and organic compounds (formaldehyde, acetaldehyde, toluene, methyl mercaptan)

present in the gas phase over the material. In fact, the building materials are usually able to

significantly reduce the concentration of the probe molecule under the conditions of these

tests.

Older reports presenting results from field trials seem to confirm the high ability of these

building materials to reduce the concentration of atmospheric pollutants. Therefore, there

was the optimistic assessment that the large-area use of these materials will have a

significant positive impact on air pollution. Very recently, however, reports have been

published which cast doubt on this optimistic assessment.

This contribution firstly discusses the question in how far the results of the activity

measurements in the laboratory can be transferred to field conditions. Secondly, some of

the reasons are discussed which explain the large discrepancy between the results of

various field trials.


AdvPhotoCat2015



7

Fabrication and application of different TiO2-based composite

photocatalytic materials with specific structural and morphological

features

Zsolt Pap1,2,3

, Gábor Veréb1,4

, Krisztina Vajda1, Balázs Réti

1,5, András Dombi

1,

Klara Hernadi1,5

1Research Group of Environmental Chemistry, Institute of Chemistry, University of Szeged, Tisza Lajos krt.

103, HU–6720 Szeged, Hungary; 2Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János 11, RO–400028

Cluj-Napoca, Romania 3Faculty of Physics, Babeș–Bolyai University, M. Kogălniceanu 1, RO–400084 Cluj–Napoca, Romania;

4Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9., H-6725,

Szeged, Hungary 5Department of Applied and Environmental Chemistry, Faculty of Sciences and Informatics, University of

Szeged, Rerrich tér 1, H-6720 Szeged, Hungary

Photocatalysis is one of the most investigated topic in the field of advanced oxidation

processes. Researchers around the world aim at develop semiconductor photocatalysts that

can be effectively utilized for decomposing potentially harmful compounds in air and

water. These catalysts can be also suitable for converting the energy of sunlight to green

energy sources by generating hydrogen from water based solutions. We attempt to apply

different approaches exploit the advances of photocatalysis. Here we report on the

challenges and progresses of various fields such as (i) the preparation and characterization

of TiO2/MWCNT nanocomposite photocatalysts (ii) the effectiveness of rutile and anatase

phases in the decomposition of various contaminants (including bacteria desinfection) and

(iii) the possible role of “crystallographic” holes in titania discovered by a little

serendipity. We believe that these scientific “crumbs” contribute the understanding of

complex photocatalytic reactions.

AdvPhotoCat2015



8

TiO2 as a general purpose electron-conducting protection layer for water

splitting photoelectrodes

Peter C. K. Vesborg*, Bastian Mei*, Thomas Pedersen**, Paolo Malacrida*, Dowon Bae*, Rasmus Frydendal*, Ole Hansen** , Ib Chorkendorff* and Brian Seger*

* DTU-Physics, B. 311, Fysikvej DTU, DK-2800 Kgs Lyngby, Denmark

** DTU-Nanotech, B.345 E, Ørsteds plads DTU, DK-2800 Kgs Lyngby, Denmark

corresponding author: [email protected]

Crystalline silicon is a prime candidate for a low bandgap photoelectrode in a tandem device for

water splitting using solar light, but silicon very prone to passivation via oxidation and therefore

not stable under the operation conditions of a tandem device. It needs to be protected against

oxidation– both when serving as a photocathode and as a photoanode. Great progress in protecting Si-based photocathodes has been realized in recent years (1–5). TiO2 is

highly suitable as a cathodic protection layer due to its n-type semiconducting properties and the

favorable position of the conduction band (3–7). Conversely, TiO2 was not considered useful as a

protection layer for photoanodes due to its n-type nature and due to its very low lying valence band

position which hinders hole conduction to the surface of a photoanode. Interestingly, it was

recently discovered that “leaky” TiO2 could in fact be used for protecting photoanodes (8) although

the exact mechanism of current transfer through “leaky” TiO2 was not clear. Building this work, we

have found that even pristine, crystalline TiO2, which conducts via electrons in the conduction

band, may work efficiently as a protection layer for photoanodes provided that the junctions

between the absorber and TiO2 and between the TiO2 and the OER catalyst is tailored for electron

transfer. (9) This opens a path for using thick, durable, yet transparent TiO2 coatings for

photoanode protection as well as photocathode protection.

References: 1. Y. Hou, B. L. Abrams, P. C. K. Vesborg, M. E. Björketun, K. Herbst, L. Bech, A. M. Setti, C. D. Damsgaard, T. Pederson, O. Hansen, J. Rossmeisl, S. Dahl, J. K. Nørskov, and I. Chorkendorff, Bioinspired molecular co-catalysts

bonded to a silicon photocathode for solar hydrogen evolution. Nat. Mater. 10, 434–8 (2011). 2. S. Dahl, I. Chorkendorff, Solar-fuel generation: Towards practical implementation. Nat. Mater. 11, 100–101 (2012). 3. B. Seger, A. B. Laursen, P. C. K. Vesborg, T. Pedersen, O. Hansen, S. Dahl, and I. Chorkendorff., Hydrogen production using a molybdenum sulfide catalyst on a titanium-protected n(+)p-silicon photocathode. Angew. Chem. Int. Ed. Engl. 51, 9128–31 (2012). 4. B. Seger, T. Pedersen, A. B. Laursen, P. C. K. Vesborg, O. Hansen, and I Chorkendorff, Using TiO2 as a conductive protective layer for photocathodic H2 evolution. J. Am. Chem. Soc. 135, 1057–64 (2013). 5. B. Seger, I. E. Castelli, P. C. K. Vesborg, K. W. Jacobsen, O. Hansen, and I. Chorkendorff, 2-Photon tandem device

for water splitting: comparing photocathode first versus photoanode first designs. Energy Environ. Sci. 7, 2397 (2014). 6. K. Sivula, ChemCatChem, in press, doi:10.1002/cctc.201402532. 7. Y. W. Chen, J. D. Prange, S. Dühnen, Y. Park, M. Gunji, C. E. D. Chidsey, and P. C. McIntyre, Atomic layer-deposited tunnel oxide stabilizes silicon photoanodes for water oxidation. Nat. Mater. 10, 539–44 (2011). 8. S. Hu, M. R. Shaner, J. A. Beardslee, M. Lichterman, B. S. Brunschwig, N. S. Lewis, Amorphous TiO2 coatings stabilize Si, GaAs, and GaP photoanodes for efficient water oxidation. Science 344, 1005–1009 (2014). 9. B. Mei, T. Pedersen, P. Malacrida, D. Bae, R. Frydendal, O. Hansen, P. C. K. Vesborg, B. Seger, I. Chorkendorff, Crystalline TiO2: A generic and effective Electron conducting Protection Layer for Photo-anodes and –cathodes. J. Phys.

Chem. C. accepted (2015)


AdvPhotoCat2015



9

Solar-activated controlled release of compounds from polymeric

microcapsules functionalized with photocatalytic nanoparticles

J. Marques1, A.D. Ribeiro

1, F.C. Correia

1, P. Parpot

2, C.J. Tavares

1* 1Centre of Physics, University of Minho, Guimarães, Portugal 2Centre of Chemistry, University of Minho, Braga, Portugal.

*[email protected]

TiO2 nanoparticles were synthesized using a low temperature hydrothermal treatment.

These nano materials have photocatalytic properties that upon solar activation initiate the

controlled release of volatile compounds (e.g., insecticides, repellents, deodorants,

fragrances, etc.) from within polymeric microcapsules. Preferably under ultraviolet

irradiation, oxidation-reduction mechanisms on the semiconductor surface breakdown the

polymer chains of the capsule wall, yielding the volatilization of the encapsulated

compounds. The polyamide microcapsules were prepared by interfacial polycondensation

in an ultrasonic bath and their size ranges from 10-100 µm. The quantification of the

output release has been performed by gas chromatography analysis coupled with mass

spectroscopy. The effect of pH synthesis of the titania nanoparticles on the release yield

was investigated. X-ray diffraction experiments were performed in order to study the

crystallinity and domain size (<10 nm). Photoluminescence technique was used for the

detection of hydroxyl radicals (•OH) produced during the photocatalysis reaction.

Coumarin was chosen as molecular probe, which readily reacted with •OH radicals to

produce a highly fluorescent sub-product, 7-hydroxycoumarin (7HC), which shows a

strong PL signal at 456 nm.

mailto:*[email protected]

AdvPhotoCat2015



10

Kinetics and Mechanism of Air Toxics Photocatalytic Degradation on

synthesizedmetal-doped TiO2 nano-powders. Indoor and Outdoor

Applicability.

Vassileios C. Papadimitriou, Emmanuel S. Karafas, Manolis N. Romanias,

Panos Papagiannakopoulos Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of

Crete, 71003 Heraklion, Crete, Greece

Abstract

Photocatalytic efficiency of TiO2-based synthesized nano-structured materials against

common air toxics was evaluated under relative to indoor and outdoor environmental

conditions. Mn- and Co- transition metals were used as single or binary TiO2 enrichments

in trace levels, i.e., 0.02 – 0.10 %, and the impact of the metal dopant kind, doping levels

and photocatalysis end-products were determined and assessed. Metal doped TiO2 samples

were prepared by co-precipitation method and characterized by XRD, SEM- EDX and UV-

visible diffuse reflection spectroscopy. The photocatalytic activity was determined by

using the Photochemical Static Reactor/FTIR technique. Gases concentration decays were

monitored with in-line FTIR spectroscopy and real time adsorption and indoor and outdoor

light induced photocatalysis was measured at 700 N2/O2 Torr and 296 K. Volatile end-

products were simultaneously recorded with FTIR spectroscopy and CO2 and CO

conversion yields were measured. In all cases, no chemical alteration in the gas phase

composition was observed during adsorption process, while CO2 and H2O were the major

photocatalysis end-products, under both indoor and outdoor system conditioning. In

outdoors simulation chamber experiments (increased levels of UV light), CO was also

detected and quantified, at substantially lower levels compared to CO2 and H2O, <1%. No

CO was detected under indoor simulation experiments, and the upper product-yield was

determined. No other air toxics were identified as end-products showing that doped TiO2

nanopowders might provide a clean and efficient solution to combat both indoor and

outdoor pollution.

Keywords:

Metal-doped TiO2, Indoor and Outdoor Photocatalysis, Photocatalysis kinetics and end-

products analysis

AdvPhotoCat2015



11

Fast Synthesis and Characterization of CdSe Colloidal Quantum Dots for

Photocatalytical Applications

Ion Geru1, Alexandr Dorif

1, Violeta Fratescu

1, Anton Airinei

2, Valeria Harabagiu

2

1 Institute of Chemistry of the Academy of Sciences of Moldova, Chishinau, Moldova

2 Institute of Macromolecular Chemistry “Petru Poni”, Iasi, Romania

e-mail: [email protected]

The colloidal quantum dots (QDs), in general, and CdSe QDs, in particular, are promising

materials for photocatalysis [1-5]. The first quantitative analysis of quantum dots size-

controlled photocatalytic hydrogen evolution at the semiconductor-solution interface is

reported in [1], where it was established that the proton reduces on cadmium sites on the

dots and charge separation is controlled by size effects, not by space charge layers. A

promising strategy for the design of high-efficient photocatalysts for the water purification

from organic pollutants was proposed in [2]. The photocatalytic activity of CdSe QDs was

evaluated by the decomposition of cefalexin under UV irradiation [3]. In [4] a novel hybrid

Nih-CdSe/CdS core/shell QD is presented as a simple and exceptional artificial

photocatalyst for hydrogen production from aqueous solution of isopropanol. Also CdSe

QDs manifests photocatalytic activity being coupled with platinum nanoparticles in reverse

micelles [5]. Here we present technology for fast CdSe quantum dots synthesis in toluene

which can beused in photocatalytic applications. Cadmium precursor was prepared under

the argon flux and constant stirring by heating of cadmium acetate with an excess of oleic

acid to the disappearance of acetic acid smell, followed by addition of toluene to dissolve

cadmium oleate. Selenium precursor was prepared by mixing selenium powder with

mixture of trioctylphosphine and tributylphosphine taken in excess and vigorous stirring

until selenium dissolves. Selenium precursor solution was added to the cadmium precursor

solution heated to the 100°C and this mix was maintained for a minute. Then, argon flux,

mixing and heating were stopped and reaction flask was cooled. In the reaction mix cold

methanol was added to precipitate CdSe Qds. Precipitate was washed with methanol and

acetone and centrifuged at 8000 rpm to remove organic contaminants. Remains of solvents

were removed by heating and obtained solid was re-suspended in chloroform.

UV-Vis absorption spectra were obtained using Specord 200 UV-Vis spectrophotometer

and diameter in nanometers of obtained CdSe QDs was calculated upon UV-Vis absorption

spectra according to [6]. Typical absorption spectrum is presented in Fig. 1. This diameter

of 2.02 nm obtained from optical absorption spectrum was approved by XRD data (d=1.93

nm). Similar absorption spectrum is observed for 1.84 nm CdSe QDs.

We also obtained photoluminescence spectra. The

evolution of UVVis and PL spectra of 1.84 and 2.02 nm

CdSe QDs solution in chloroform vs. concentration was

studied. Fig. 1. UV-Vis absorption spectrum of CdSe Qds with

diameter of 2.02 nm. [1] Zhao J., Holmes M.A, Osterloh F.E., ACS Nano 7(5), 4316-

4325(2013).

[2] Ma C., Zhou M., Wu D. et al., CrystEngComm 17, 1701 (2015).

[3] Liu X., Ma C., Yan Y. et al., Ind. Eng Chem. Res. 52, 15015-

15023 (2013).

[4] Li S.-J., Wang I.-J., Li X.-B., Adv. Mat. 25(45), 6613-6618 (2013).

[5] Harris C., Kamat P.V., ACS Nano 4(12), 7321-7330 (2010).

[6] Yu W. W., Qu L., Guo W., Peng X., Chem. Mat. 15, 2854-2860 (2003).


AdvPhotoCat2015



12

Mediating oxidation state of plasmonic gold grown on layered double

hydroxides matrices for UV and solar driven photocatalysis

Shogo Kawamura1, Elena Florentina Grosu

2 Yasuo Izumi

1 and Gabriela Carja*

2

1 Department of Chemistry, Graduate School of Science, Chiba University,

Yayoi 1-33, Inage-ku, Chiba 263-8522, Japan 2 Department of Chemical Engineering, Faculty of ChemicalEngineering and Environmental Protection,

Technical University “Ghe. Asachi” of Iasi, Bd. D. Mangeron no 71, Iasi, 700554, Romania, *e-mail:

[email protected]

An important factor limiting the conversion efficiency of almost every active photocatalyst

is the high rate of charge-carrier recombination. It has recently found that the

recombination problem is significantly alleviated by assembling plasmonic metal

nanoparticles (MeNPs) and semiconductor supports [1]. In MeNPs/support co-catalytic

systems the manipulation of MeNPs photo-responsive effects gives rise to specific electron

transfers at the interface that reduce the charge-carrier recombination rate and facilitate the

overall photocatalytic activities in which electrons are involved. To date is still challenging

to obtain self-assemblies of plasmonic Au and semiconductor supports that are able to join

the photoresponsive effects of the components and also to give rise to a specific response

of plasmonic gold [2]. In this regard, we present here the assemblies of AuNPs with

matrices of LDH clays with compositions. The growing of AuNPs on the surface of the

larger nanoparticles of LDHs were done by exploiting the reconstruction of the freshly

calcined LDHs in the aqueous solutions of Au(O2CCH3)3. Powder X-ray diffraction

(PXRD), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron

microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and UV-Visibile

spectroscopy and XAFS analysis were used to investigate the structural, composition and

size-morphology characteristics of the catalysts. The oxidation states of AuNPs on LDHs

are tailored by using solar irradiation. The photocatalytic capability of the catalysts were

evaluated for the degradation process of phenol and acetophenone in aqueous solutions

under solar and UV irradiation. Furthermore, AuNPs/LDHs nanoarchitectures were

evaluated as photocatalysts for the process of CO2 reduction.

Acknowledgment: This work was supported by a grant of the Romanian National Authority for

Scientific Research, CNCS-UEFISCDI project number PN-II-ID-PCE-2012- 4-0057 (contract

number 75/2013).This work was also supported by the Nippon Sheet Glass Foundation for

Materials Science and Engineering, and by the project “Development Base of Advanced Materials

Development and Integration of Novel Structured Metallic and Inorganic” of the Ministry of

Education, Culture, Sports, Science, and Technology (MEXT), Japan.

1. D. B. Ingram, S Linic, J. Am. Chem. Soc. 2011, 133, 5202. 2. S. Kawamura, M. C. Puscasu, Y. Yoshida, Y. Izumi, G. Carja, Appl. Catal. A, in press,

http://dx.doi.org/10.1016/j.apcata.2014.12.042.


AdvPhotoCat2015



13

First-principles studies of metal nanoparticles and semiconductor

nanoribbons with metallic edges

Ioannis N. Remediakis Dept. of Materials Science and Technology, University of Crete, 71003 Heraklion, Greece and

Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology Hellas

(FORTH), 71110 Heraklion, Greece

Electronic structure calculations, typically at the level of Density-Functional Theory

(DFT), play a key role in the design of new materials for photocatalysis. Two characteristic

examples are the study of ground-state electronic state in nanostructures, and the

simulation of electron transport in semiconductors. The positions and density of electron

levels in the nanoparticles of the material determine its light absorbance. At the same time,

the presence of conducting channels in the substrate allows for quick transport of electrons

and greater turnover frequencies.

Here, we focus on two characteristic examples for such calculations and present

recent work on the structure and properties of (a) catalysts that includes Au nanoparticles

supported on TiO2 and (b) MoS2 nanoribbons with metallic edges.

For rutile-supported Au, the supporting oxide is found to enhance the catalytic

properties of the metal by enforcing specific shapes on the metal clusters, and also by

providing a reaction path at the metal-oxide interface [1]. As the shape of Au nanoparticles

allows for fine-tuning of its electronic structure, we investigate shape changes when Au

has strong interactions with other materials [2-3]. Regarding MoS2 we find its electronic

and optical properties depend strongly on the dimensionality: 2D material is

semiconducting while 1D is metallic. In nanoribbons, both behaviors coexist. We study the

spatial extent and permittivity of the metallic edges [5].

Left: Wavefunctions for electrons in metallic states at the edges of a MoS2 nanoribbon [5].

Right: Equilibrium-shaped gold nanoparticles supported on rutile TiO2 from simulations

[2] and TEM experiments [4] in vacuum (left, right) and CO gas (center).

Acknowledgment: This work was supported by the Research Council, University of Crete and by project ERC-02 ExEL (Grant No. 6260).

AdvPhotoCat2015



14

Effect of Mn doping on the structure, photocatalitic and sensing

properties of nanostructured titanium oxide powders and thin films

Felicia Iacomi1, Vassilios Binas

2, Gheorghe Zodieriu

1, Vasile Tiron

1, Adriana Popa

4, Dana

Toloman4, Marius Dobromir

1, Cornel Doroftei

1, Apostolos Zachopoulos

2, George Kiriakidis

2,3

1 Faculty of Physics, "Alexandru Ioan Cuza University, 11 Carol I Boulevard, 700506 Iasi, Romania 2 Institute of Electronic Structure and Laser (IESL), FORTH, P.O. Box 1527, Vasilika Vouton,

GR-70013 Heraklion, Crete, Greece 3 Physics Department, University of Crete, 710 03 Heraklion, Crete, Greece

4 National Institute for Research & Development of Isotopic and Molecular Technologies P.O.Box 700,

3400 Cluj-Napoca, Romania

Nanostructured powders and thin films of Mn doped titanium oxide (0.1-10.0 % Mn),

synthesized by using a modified sol-gel method or a solid state reaction [1] and deposited

on different substrates (glass, quartz etc) using magnetron sputtering methods (oxide

targets, metal targets). The structural studies evidenced that the phase composition,

crystallite morphology, structural defects and thin film surface roughness are strongly

influenced by the synthesis or deposition methods, by manganese concentration and by

annealing temperature.

2000 3000 4000 5000

A=86G

g=2.55

A=75Gg=2.13

g=2.65

g=3.12

Mn2+

TO0.1Mn

TO1Mn

A=91G

A=75G

A=92G

A=81G

g=1.86

g=2.13

Mn4+

g=1.99

EP

R s

ign

al in

ten

sity (

arb

. u

nits)

B (Gauss)

0 40 80 120 160 200 240 280

0.0

0.2

0.4

0.6

0.8

1.0

ct/c

o

Time (min)

MB alone

TO

TO0.1Mn

TO0.2Mn

TO0.4Mn

TiO1Mn

TO10Mn

Figure 1. Room temperature EPR spectra

registered in X band (9.402 GHz)

Figure 2. Kinetics of MB degradation of undoped

and Mn doped photocatalysts under visible light

irradiation

EPR spectra registered at room temperature in X band evidenced the presence of

Mn2+species for low manganese contents and Mn4+ for contents higher than 0.1% Mn

(Fig.1). These results explain the photocatalytic properties of studied samples when are

irradiated with visible light (Fig.2). It was observed that 0.1% Mn doped TiO2 (TO0.1Mn,

anatase) photodegraded about of 95% of methylene blue (MB) within 260 min while the

0.2, 0.4, 1 and 10% Mn dopant concentration photodegraded about 46%, 43%, 33% and

22%, respectively in same time and that 10% Mn doped TiO2 (anatase+rutile) thin films

are sensitive for acetone vapors. The results obtained for optical, magnetic and gas

sensitivity properties sustain the importance of controlling the phase structure and

structural defects.

AdvPhotoCat2015



15

Silver Nanoparticles Influence on Photocatalytic Activity of

Hybrid Materials Based on TiO2 P25

Edina Rusen1, Alexandra Mocanu

1, Aurel Diacon

1, Adrian Dinescu

4,

Raluca Șomoghi3, Tomkouani Kodom

1,2, Ioan Călinescu

1 and Cristian Boscornea

1

1Department of Bioresources and Polymer Science, University Politehnica of Bucharest, 1-7 Gh. Polizu

Street, 011061 Bucharest, Romania 2Laboratory of Water Chemistry, Faculty of Sciences, University of Lome, Lomé, Togo

3National Research and Development Institute for Chemistry and Petrochemistry (ICECHIM), 202

Independence Street,District 6, CP 35-174, 060021 Bucharest, Romania 4National Institute for Research and Development in Microtechnologies (IMT-Bucharest), 126 A, Erou Iancu

Nicolae Street,P.O. Box 38-160, 023573 Bucharest, Romania

TiO2/AgNPs hybrid materials can be activated for water disinfection and photodegradation by

both UV and visible light being based on three possible routes (Scheme 1) that associate the

photocatalytic properties of TiO2 (route I) with the antimicrobial and photocatalytic

characteristics of AgNPs (route II) and the interaction between TiO2 and Ag (route III).

Scheme 1. Possible routes for the photocatalytic activity of the TiO2 AgNps hybrid

materials

The aim of the present study consists in the obtaining of a hybrid material film

using TiO2 P25 and silver nanoparticles (AgNPs). The film manufacturing process

involved realization of physical mixtures of TiO2 P25 and AgNPs dispersions. The size

distribution of the AgNPs proved to be a key factor determining the photodegradation

activity of the materials measured using methyl orange. The best result was 33%

degradation of methyl orange (MO) after 150 min. The second approach was the

generation of AgNPs on the surface of TiO2 P25. The obtained hybrid material presents

photocatalytic activity of 45% MO degradation after 150 min. The developed materials

were characterized by UV-VIS, SEM, and DLS analyses.

Acknowledgement The authors would like to thank for the financial support provided by the National Authority for

Scientific Research from the Ministry of Education, Research and Youth of Romania through the -

PN-II-PT-PCCA-2013-4-0203 - NITRO-MIP project. Aurel Diacon and Alexandra Mocanu acknowledge financial support from the Sectoral Operational Programme Human Resources

Development 2007–2013 of the Ministry of European Funds through the Financial Agreements

POSDRU/159/1.5/S/132395 and POSDRU/159/1.5/S/132397.

AdvPhotoCat2015



16

EFDEN 4C – The first research center for comfort conditions in

Romania, the first house full certified living building challenge in Europe

Ioana Prodan, Claudiu Marius Butacu, Mihai Toader-Pasti, Eduard-Daniel Raducanu [email protected] [email protected] [email protected] [email protected]

EFdeN is the project which represented Romania at the Solar Decathlon

Europe 2014 competition finals, the most important competition of

architecture and embedded technologies in the world. In order to achieve

active-house standards in the EFdeN project are implemented a series of

active and passive strategies. The project aims to become the first Research

Center for Comfort Conditions in Romania and also, the first house full

certified Living Building Challenge in Europe.

Keywords: EFdeN, Solar Decathlon Europe, Living Building Challenge, Research Center, Active-House, Net Zero Energy Building, Phase-Changing Materials.

Reducing energy consumption, eliminating wastage, reduce CO2 emissions are among the

main goals of the European Union (EU) until 2020. Therefore, it is very important that each

Member State of the European Union to support the development of Net Zero Energy

Buildings (NZEB).

EFdeN it an educational and research project which means more than 60 students: architects,

engineers, communicators, all with the same goal: to find the best solution in order to build a

sustainable, energy efficient, active solar house. By means of our research, we want to

become an example for Romanian people and to be a precedent for the academic

environment. We want to prove that a sustainable lifestyle is a viable alternative in Romania

and Solar Decathlon Europe competition is an incredible experience and more and more

students should be part of.

Our aim is that the EFdeN prototype to be fully certified Living Building Challenge and it

involves a series of very challenging requirements, including: net zero energy, net zero

water, use of environmentally friendly materials (it has to respect a red list with restricted

materials) etc..

The prototype has been designed to comply with national and French norms and standards

and with Solar Decathlon Europe stringent requirements.

All the systems in the building have been designed to meet the comfort parameters and

conditions in a very accurate manner, but with minimum energy consumption.

In order to achieve these goals we have implemented a number of active strategies (heat

pump, radiant system, heat recovery unit, solar panels, photovoltaic panels, BMS etc.) and a

number of complementary passive solutions (phase-changing materials (PCM), thermal

mass, highly advanced envelope elements, shadings, natural ventilation, day lighting etc.).

Applications: envinronmental, energy, green chemistry





AdvPhotoCat2015



17

Extracted TiO2 as novel catalyst for photocatalytic reduction of carbon

dioxide

Martin Reli1, Nela Ambrožová

1, Marcel Šihor

1, Lenka Matějová

1, Marcin Kobielusz

2, Lucie

Obalová1, Kamila Kočí

1.

VSB-TU Ostrava, 17. listopadu 15/2172, 708 33, Ostrava, Czech Republic 2 Jagiellonian university, Ingardena 3, 30-060, Krakow, Poland

[email protected]

The atmospheric concentration of CO2 has recently increased owing to human activity,

further accelerating the greenhouse effect. During the last decade, growing concerns have

driven research activities toward the artificial conversion of CO2 into fuels or valuable

chemicals through thermochemical, biological, electrochemical and photocatalytic

methods. Compared to these methods, artificial photosynthesis, photocatalytic conversion

of CO2, does not require an extra energy input except solar radiation and it is considered as

the most attractive route for the transformation of CO2 in the long term.

In this work a novel way of preparation of TiO2 photocatalysts were used. TiO2

photocatalysts were prepared by sol-gel method controlled within the reverse miceles of

nonionic surfactant Triton X-114 in cyclohexane and by using pressurized hot (subcritical)

water and alcohol processing. The photocatalysts differ in the alcohol used for their

preparation. Two different alcohols were used, methanol - TiO2 (M) and ethanol – TiO2

(E). The processing by pressurized hot fluids was carried out on a laboratory-made setup at

200°C and 10 MPa. All prepared catalysts were characterized by various methods (XRD,

N2 physisorption, UV-Vis DRS, elemental analysis, photocurrent measurement).

The photocatalytic reduction itself was carried out in a homemade stirred, batch, annular

reactor with 8W Hg UV lamp. The preliminary tests show the promising activity of

prepared catalysts, very similar to commercial TiO2 Evonik P25 (Fig. 1). The key role in

the CO2 photocatalytic reduction plays the energies of electrons and holes within the

electronic structure of photocatalysts, and It can be influenced by preparation method.

(a)

(b)

Fig. 1: Dependence of methane (a) and hydrogen (b) yields on the irradiation time over

TiO2 photocatalysts. This work was supported by the Grant Agency of the Czech Republic (projects. reg. Nos. 14-35327J and 14-23274S) and “National Feasibility Program I”, project LO1208 “TEWEP” from Ministry of Education,

Youth and Sports of the Czech Republic.


AdvPhotoCat2015



18

Removal of antibiotics from wastewater using photocatalytic membranes

Cristina Orbeci*1

, Daniela Simina Ştefan*, Annette Madelene Dăncilă*

* University POLITEHNICA of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7 Polizu

Street, 011061, Bucharest Romania 1 e-mail: [email protected]

Removal of organic compounds in wastewater is a very important subject of

research in the field of environmental chemistry [1-5]. The technologies of separation or

removal of antibiotics from wastewaters based on membrane and photocatalytic processes

play an important role [1, 2]. In this sense, photocatalysis is a handy promising technology,

very attractive for wastewater treatment and water potabilization. Separation membranes

have become essential parts of the human life because of their growing industrial

applications in high technology such as biotechnology, nanotechnology and membrane

based separation and purification processes [1, 4]. Available technologies to deal with

organic compounds include the advanced oxidation processes, based on the formation of

very active hydroxyl radicals, which react quickly with the organic contaminant.

Photocatalysis represents one of the main challenges in the field of treatment and

decontamination systems, especially for water and air. Its operating principle is based on

the simultaneous action of the light and a catalyst which allows for pollutant molecules to

be destroyed without damaging the surrounding environment. Among the AOPs, the

photocatalytic process is one of the most attractive methods because the reagent

components are easy to handle and environmentally benign [4,5].

This paper presents a hybrid method of disposal photocatalytic membrane - organic

compounds from synthetic solutions of antibiotics (ampicillin, erythromycin and

tetracycline). Hybrid process for the disposal of antibiotics from aqueous solutions

combines the selectivity of membranes with high efficiency and photocatalytic process.

Process variable parameters are: initial concentration of antibiotics, initial aqueous solution

pH, type of membrane used. The degradation process was studied by monitoring the

organic substrate concentration changes as function on reaction time using chemical

oxygen demand analysis (COD) and total organic carbon analysis (TOC).

References:

1. Ahmed, S., Rasul, M. G., Martens, W. N., Brown R., Hashib, M. A., Heterogeneous

photocatalytic degradation of phenols in wastewater: A review on current status and

developments, Desalination, 261 (1-2), 2010, 3-18

2. Lifen L., Guohua Z., Fenglin Y., Adsorptive removal and oxidation of organic pollutants from water using a novel membrane, Chemical Engineering Journal, 156 (3), 1 2010, 553-

556

3. Orbeci C., Untea, I., Dancila, M., Stefan, D.S., Kinetics considerations concerning the

oxidative degradation by photo-Fenton process of some antibiotics, Environmental

Engineering and Management Journal, 9, 2010, 1-5

4. Mohamed S. Hamdy, Wibawa H. Saputera, Edgar J. Groenen, Guido Mul, A novel TiO2 composite for photocatalytic wastewater treatment, Journal of Catalysis, 310, 2014, 75–83

5. Zhu X.D., Wang Y.J., Sun R.J., Zhou D.M., Photocatalytic degradation of tetracycline in

aqueous solution by nanosized TiO2, Chemosphere, 92, 2013, 925-932


http://www.sciencedirect.com/science/article/pii/S0021951713002704



http://www.researchgate.net/publication/259505603_A_novel_TiO2_composite_for_photocatalytic_wastewater_treatment

http://www.researchgate.net/publication/259505603_A_novel_TiO2_composite_for_photocatalytic_wastewater_treatment

http://www.sciencedirect.com/science/journal/00219517

http://www.sciencedirect.com/science/journal/00219517/310/supp/C

AdvPhotoCat2015



19

Hydrothermally Grown TiO2 for Self-Cleaning Applications

D. Vernardou,a,* E. Koudoumas,

a,c and N. Katsarakis

a,b,c

a Center of Materials Technology and Laser, School of Applied Technology, Technological Educational

Institute of Crete, 710 04 Heraklion, Crete, Greece (e-mail: [email protected] ). b Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, P.O. Box 1527,

Vassilika Vouton, 711 10 Heraklion, Crete, Greece. c Electrical Engineering Department, Technological Educational Institute of Crete,

710 04 Heraklion, Crete, Greece.

The self-cleaning mechanism is a unique dual-action property of surfaces. The

photocatalytic action, in which the coating reacts with daylight to break down organic dirt

and the hydrophilic action in which the rainwater hits the glass and spreads evenly, running

off in a ‘sheet’, and taking the loosened dirt with it, drying quickly without leaving streaks.

Control of the self-cleaning property has attracted great interest because of its importance

in fundamental research and industrial fields.

In this paper, titanium (IV) oxide (TiO2) nanostructured thin films were deposited on

Corning glass 7059 substrates by hydrothermal synthesis at 95 oC, for various deposition

times and varying solution chemistry. The structural, morphological and optical properties

of the films were evaluated by X-ray diffraction (XRD), Raman spectroscopy, Energy

Dispersive X-ray analysis (EDX), atomic force microscopy (AFM) and UV-Vis

spectroscopy respectively. The dark and photoinduced hydrophilicity of the films were also

examined by means of contact angle measurements (Figure 1), while their photocatalytic

response was studied via the degradation of methylene blue (C16H18N3ClS) (Figure 2).

Anatase films grown for a deposition period of 20 h using i-PrOH were found to

simultaneously exhibit optimum photoinduced reversible hydrophilic and photocatalytic

response.

Figure 1. Water contact angle

dependence on UV illumination time of

the samples grown using i-PrOH for a

range of deposition periods 20–50 h

Figure 2. Variation of the area under the

C–H stretching region of the stearic acid

spectrum (inset) as a function of the UV

illumination time for the samples grown

using i-PrOH, EtOH and 0.02 M NaOH/i-

PrOH for 20 h.


AdvPhotoCat2015



20

Photocatalytic ZnO on textile substrates for air purification applications

I V. Tudose 1,2

, N. Vrinceanu 1,3

and M. Suchea 1,2

1Chemistry Faculty, “Al.I.Cuza” University of Iasi, 11 Bulevard Carol I, Iasi, 700506, Romania, Romania

2Center of Materials Technology and Laser, School of Applied Technology, Electrical Engineering Department, Technological Educational Institute of Crete, Heraklion, Greece

3”Lucian Blaga” University of Sibiu, Department of Textile Technologies, Sibiu, Romania

[email protected]; [email protected]

The photocatalytic materials have various applications such as self-cleaning, antifogging,

antibacterial actions, deodorization or decomposition and removal of pollutant. These

applications are responsible for the development of a broaden range of so called smart

materials used constructions. TiO2 and ZnO are most widely used semiconductor

photocatalysts because of their high photosensitivity, photochemical stability, large band

gap, strong oxidizing power and non-toxic nature. Particularly, anatase TiO2 has been

reported as the most extensively used semiconductor photocatalyst for industrial

applications and pollution clean-up since 1970s. Recent research reports ZnO to show an

even better activity than TiO2 in the photodegradation of some dyes in aqueous solutions,

since it can have better light absorption efficiency. The successful exploitation of such

catalysts requires the development of techniques for controlling their size, morphology,

structural and surface characteristics, as well as efforts to enhance their photochemical

response to visible/solar illumination. Presently, are quite few reports in the literature

presenting state of art approaches of use of ZnO material onto textile substrates for several

applications as antibacterial, deodorizing and UV protection, and none regarding any

systematic approach of direct growth and optimization with respect the textile support.

More than that, up to our knowledge, except our previously reported preliminary results,

there is no available study in the literature about ZnO coated textiles used as photocatalytic

active support for gaseous compounds decomposition. The present presentation will

present recent advances on photocatalytic ZnO onto textile supports for air purification

applications. Nano and micro-structured ZnO coatings onto various textile substrates were

grown by aqueous solution chemical growth from different precursors. Effect of the

substrate was rigorously considered. Excellent quality coatings with high stability and

photocatalytic efficiency were obtained onto mineral fibres substrates.

Acknowledgements Part of the work was partially supported by a grant of the Romanian National Authority for

Scientific Research, CNCS – UEFISCDI, project number PN-II-RU-TE-2012-3-0202 and by the

strategic grant POSDRU/159/1.5/S/133652, co-financed by the European Social Fund within the Sectorial Operational Program Human Resources Development 2007 – 2013.



AdvPhotoCat2015



21

ZnO and TiO2 nanostructured onto polymeric samples with enhanced

photocatalytic behavior G. Kenanakis

1,2, D. Vernardou

2 and N. Katsarakis

1,2

1 Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, Crete, Greece 2 Center of Materials Technology and Photonics, School of Engineering, TEI of Crete, Greece

Email: [email protected]

Semiconductor-assisted photocatalysis has attracted considerable attention among

advanced oxidation process as a promising tool for implementing the large-scale

purification of wastewaters at low cost. Among the various semiconductors employed,

TiO2 and ZnO are known good photocatalysts for the degradation of several environmental

contaminants due to their high photosensitivity, stability and large band gap.

In this work, ZnO and TiO2 micro- and nano-structures with different morphologies

were deposited on bare and seeded polymer substrates using aqueous solution approaches

at low temperature. The photocatalytic efficiency of the obtained ZnO and TiO2 samples

were investigated by means of decolorization of Methylene Blue (MB) in aqueous

solution. It is concluded that the critical parameter is the high surface-to-volume ratio of

the as-grown nanostructures, the coverage of the substrates and the crystallinity of the

samples.

Fig. 1. SEM image of ZnO (a) and TiO2 nanostructures grown at 95oC on low density PE

for 5h growth time

0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 510

0

20

40

60

80

100

No

rma

lize

d I

nte

gra

ted

Are

a

Time (min)

Photolysis

ZnO, 1h growth

ZnO, 2h growth

ZnO, 5h growth

(a)

0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 510

0

20

40

60

80

100

No

rma

lize

d I

nte

gra

ted

Are

a

Time (min)

Photolysis

TiO2, 1h growth

TiO2, 2h growth

TiO2, 5h growth

TiO2, 10h growth

TiO2, 24h growth

TiO2, 48h growth

TiO2, 72h growth

(b)

Fig. 2. Normalized integrated area of MB solution vs. irradiation time for a series of ZnO (a) and TiO2 (b) samples grown at 95oC.

Black line depicts the photolysis of MB; i.e. the decolorization of MB solution on bare substrates

upon UV irradiation.


AdvPhotoCat2015



22

Degradation of organic compounds from industrial pharmaceutical

effluent through advanced oxidation processes Cristina Orbeci

1, Cristina Modrogan

1, Annette-Madelene Dancilă

1, Daniela Simina Stefan

1

1”Politehnica” University of Bucharest,Faculty of Applied Chemistry and Materials Science, Gh. Polizu

Street 1-7, 011061, Bucharest, Romania

This paper presents an experimental study focused on the degradation of an

industrial pharmaceutical effluent through advanced oxidation processes. In the present

study, photocatalysis was applied to the degradation of organic compounds from the

pharmaceutical effluent; these have focused on the influence of the operational parameters

on the efficiency of the oxidation of the organic compounds from the effluent and

determining the optimal operating conditions with a view to obtaining a greater process

performance. The degradation process was studied by monitoring the changes in the

organic substrate concentration using chemical oxygen demand (COD), total organic

carbon (TOC) and high-performance liquid chromatography (HPLC) analyses. Results

suggest that the techniques applied could be used to remove organic compounds from

industrial pharmaceutical effluent.

Keywords: Advanced oxidation processes; photocatalysis; pharmaceutical effluent;

organic compounds

AdvPhotoCat2015



23

Polysulfone membranes doped with polymer colloids for water

decontamination Alexandra Mocanu

a, Edina Rusen

a, Aurel Diacon

a

aUniversity Politehnica of Bucharest, Department of Bioresources and Polymer Science, 1- 7 Gh. Polizu

Street, 011061 Bucharest, Romania

Two different colloidal polymer particles were obtained by employing soap-free emulsion

copolymerization of styrene (ST) with glycidyl methacrylate (GMA), respectively ST with

acrylic acid (AA). The polymer colloids have been used as support materials with large

specific area for further functionalization with triethylenetetramine (TETA), respectively

5-amino-8-hydroxyquinoline (8HQ) for complexation of Cu2+ from aqueous samples. The

next step consisted in the encapsulation of copper adsorbing polymer particles in

polysulfone (PSF) membranes (Figure 1). The morphologies of the polymer particles and

PSF membranes have been investigated through (field emission-scanning electron

microscopy (FE-SEM), while the surface modification of the polymer particles was proved

by infrared spectroscopy (FT-IR). The polymer membranes were tested using a pumping

system which allowed the flow of copper solutions through the polymer membrane.

Samples were removed until the equilibrium concentration was achieved. The efficiency of

the modified polymer membranes was quantified by the retention capacity of Cu2+ and

evidenced based on the ion coupled plasma – mass spectrometry analysis (ICP-MS).

Figure 1. SEM images of a) PSF-ST-GMA-TETA and b) PSF-ST-AA-HQ membrane

Acknowledgement Aurel Diacon and Alexandra Mocanu acknowledge financial support from the Sectoral Operational

Programme Human Resources Development 2007–2013 of the Ministry of European Funds

through the Financial Agreements POSDRU/159/1.5/S/132395 and POSDRU/159/1.5/S/132397.

a b

AdvPhotoCat2015



24

Correlations between structural information and antimicrobial

performance of fibrous supports surfaces Cristina Rimbu

a, Aurel Pui

b, Narcisa Vrinceanu

b,c

aAgricultural Sciences and Veterinary Medicine University, Faculty of Veterinary Medicine, Iasi b “Al.I.Cuza” University of Iasi, Romania

c”L.Blaga” University from Sibiu, Department of Industrial Machines and Equipments, Romania

Corresponding address: [email protected]

The main outcome and characterizing feature of the study envisages a simple alternative of

ionic silver (Ag(NH3)2]OH) deposition onto some polymeric fibrous matrices previously

grafted with MCT-β-CD (MonoChloroTriazinyl–β-Cyclodextrin), in different

concentrations. The research scope highlights an antibacterial behaviour, correlated with

the structural information. In terms of methodology, a Ag(NH3)2]OH complex have been

obtained. After a 10 minutes ultrasonication phase, the linen fibrous specimens previously

grafted with MCT-β-CD (MonoChloroTriazinyl–β-CycloDextrin), have been immersed in

the homogenous solution, for 24 h.The fibrous matrices surface design by grafting process

has been characterized by XRD technique. The antimicrobial responsivity of studied

specimens has been qualitatively and comparatively tested, against and Staphylococcus

aureus and Escherichia coli. A relevant efficient biostatic efficacy has been highlighted

against Escherichia Coli bacile.

XRD patterns of studied samples

Acknowledgements Authors are grateful to the financial support provided by the Romanian National Authority for

Scientific Research, CNCS – UEFISCDI, through project number PN-II-RU-TE-2012-3-0202

[1] Wendrler, F., Meister, F., Montigny, R., Wagener, M. (2007). Antimikrobielle Silber-

Lyocell,Fibers Textiles Eastern Europe, 15, 41.

[2] Bendak, A., Allam O. G., Gabry, L. K. El. (2010). Treatment of Polyamides Fabrics with Cyclodextrins to Improve Antimicrobial and Thermal Stability Properties, Open Textile J, 3, 6.

3. Chen, C., Chiang, C. (2008). Preparation of cotton fibers with antibacterial silver nanoparticles,

Material Lett, 62, 3607


AdvPhotoCat2015



25

Synthesis and characterization of ZnO-SnO2nanocomposites and

photocatalytic degradation of Rhodamine B dye P. Pascariu

1, A. Airinei

1, N. Olaru

1, L. Olaru

1 and V. Nica

2

1”Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, Iaşi 700487, Romania 2Faculty of Physics “Al. I. Cuza” University, Iaşi 700506, Romania

[email protected]

Nowadays, nanostructured based metal-oxide semiconductors attracted a great deal of

interest due to their potential applications in environmental purification and solar energy

transformation. Electrospinning can provide a versatile and efficient technique to prepare

metal oxide nanofibers with a high surface-to-volume ratio and porous fibrous

morphology.

In this work, ZnO-SnO2 nanofibers were fabricated via electrospinning technique

combined with calcination at 600oC. The crystallinity, structure and morphology of the

electrospunZnO-SnO2 nanofibers were discussed. The structural and morphological

properties of ZnO-SnO2ceramic nanofibers were analyzed using x-ray diffraction and

scanning/transmission electron microscopy. Their photocatalytic activity was investigated

by the degradation of Rhodamine B (RhB)dye invisible light and the results of UV−vis

analysis are reported. The photocatalytic activity of pure zinc oxide and ZnO-

SnO2nanofibercompositeswith different molar ratio, prepared using the same raw materials

and conditions, comparatively was discussed. All the RhB dye samples were investigated

for six hours of degradation and and the highest efficiency was obtained for Zn/Sn molar

ratio of 1:0.0078(Fig 1b).

Fig. 1 Properties of ZnO-SnO2ceramic nanofibers: (a) TEM microstructure obtained after

calcination at 600oC; (b) Electronic absorbtion spectra of Rhodamine B degradation at various times of exposure; (c) Yield of Rhodamine B degradation with modification Sn concentration.


AdvPhotoCat2015



26

Photocatalytic performance of TiO2 on inorganic polymeric matrices Narcisa Vrinceanu

a,c, Ioan Valentin Tudose

a,b Mirela Petruta Suchea

a,b,

a “Al.I.Cuza” University of Iasi, Romania b Center of Materials Technology and Laser, School of Applied Technology, Electrical Engineering

Department, Technological Educational Institute of Crete, Heraklion, Greece c”L.Blaga” University from Sibiu, Department of Industrial Machines and Equipments, Romania

The present study has as objective the development of new TiO2 based photocatalytic

coating onto polymeric matrices for filters playing the major role of dye contamination

removal from wastewaters. This research, approaches two methodologies: One is the direct growth of the photoactive component onto inorganic polymeric matrix

and its optimization with respect the contaminant substance target; the second is the

photocatalytic activity enhancement using the functionalization of the polymeric matrix as

well as using the transparent inorganic textile fabric as substrate and optimization with

respect of substrate properties such as texture of polymeric support, fiber thickness etc.

The expected results of this research is to obtain photocatalytic inorganic polymeric

matrices with high performance in decontamination of wastewaters derived from textile

industry.

Photocatalytic activity of studied samples,

using 365 nm UV lamp

XRD patterns of studied samples

Acknowledgements Authors are grateful to the financial support provided by the Romanian National Authority

forScientific Research, CNCS – UEFISCDI, through project number PN-II-RU-TE-2012-3-0202

[1] Jorge Medina-Valtierra et al. J. Mex. Chem. Soc. 2006, 50(1) [2] J. Lee, M. Kim, B. Kim, Water Research 2002, 36, 1776-1782

[3] N. Kaliwoh, J. Zhang, I. W. Boyd, Appl. Surf. Science 2002, 186, 241-248

[4] H. Yu, Journal of Molecular Catalysis A: Chemical 246 (2006) 206–211

AdvPhotoCat2015



27

Cr doped TiO2 thin films

C. Adomnitei, D. Mardare "Alexandru Ioan Cuza" University, Faculty of Physics, 11 Carol I Blvd., 700506 Iasi Romania

In this paper we have investigated the hydrophilic properties of the titania films doped with

chromium in increased quantities (from 2.1 at.% till 4.0 at.%). Cr-doping induces an

increase in the rutile weight percentages, a more compact structure, and a significant red

shift of the TiO2 absorption edge, the last property being very important in the self

cleaning applications. Unfortunately, for the chosen Cr concentrations, the films did not

show promising hydrophilic properties. To improve them, we have applied a novel surface

modification method, reported in literature mainly for powders, namely, surface

metallization. We have observed that, by depositing Pt islands on the film with the highest

Cr content, its hydrophilic properties improve for a certain metal coverage area. The

explanation was based on FT-IR and XPS analysis, performed on the UV irradiated and

non-irradiated films, which gives information on the relationship between hydrophilicity

and the amount of the adsorbed hydroxyl groups.

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28

Photocatalysis: General concepts and examples Cristina Coromelci

a, Maria Ignat

a,b

a Laboratory of Materials Chemistry, Department of Chemistry, ”Al. I. Cuza” University, Boulevard, Carol

I, No 11, 700506, Iasi, Romania b ”Petru Poni” Institute of Macromolecular Chemistry, 41A, Gr. Ghica Voda Alley, 700487 Iasi, Romania

Recently, a field of research with a high potential for various industrial applications has

been rapidly developed. This field refers to a hybrid concept of a photon-driven catalytic

process, named photocatalysis that has been applied in production of renewable fuels,

water/air disinfection, mineralization of organic pollutants, and organic synthesis. The

world authority on chemical nomenclature, IUPAC, describes the terminology

photocatalysis as a catalytic reaction involving light absorption by a catalyst. This article is

focusing on the introductory notions of photocatalytic processes and enlightening some

aspects on the reaction mechanism. The definition of the photocatalysis and types of such

processes will be first discussed, followed by the fundamental concepts with emphasis

given on the electronic characteristics of materials involved in a photocatalytic process. As

well, the evolution of knowledge of photcatalytic materials in terms of photocatalyst

generations will be described. Afterward, some examples of the photocatalytic reactions

and their practical applications will be given.

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29

Thickness influence on physical properties of TiO2 and Ti(Nb)O2 thin

films M. Suchea

a,b, I V. Tudose

a,b, F. Iacomi

a and E. Koudoumas

b

a“Al.I.Cuza” University of Iasi, 11 Bulevard Carol I, Iasi, 700506, Romania, Romania bCenter of Materials Technology and Laser, School of Applied Technology, Electrical Engineering

Department, Technological Educational Institute of Crete, Heraklion, Greece

corresponding author email: [email protected]

TiO2 and Ti(Nb)O2 thin films with thickness in the range 50 to 1000nm were grown onto

Corning 1737F glass and silicon substrates in an 100% argon atmosphere and deposition

constant parameters: total pressure (8×10-3 mbar), the substrate temperature at 25 oC (RT)

and plasma current I=0.45A. Structural investigations carried out by X-ray Diffraction

showed that films are amorphous and Atomic Force Microscopy (AFM) characterization

showed a strong influence of thickness variation on the film surface properties the film

roughness, the grain shape and dimensions. UV-VIS transmittance versus thickness and

hydrophobic to hydrophilic transition under UV exposure were also studied as a function

of thickness. The results proves the possibility of growth of very good thin films using one

of the most suitable large area growth techniques as well as that some of the TiO2 thin

films properties may be enhanced by Nb doping.

AFM images of TiO2 films with different thickness a) 50nm b) 100nm c) 200nm d) 1μm and

Ti(Nb)O2 films e) 66nm f) 100nm. Scan size 2x2μm.

Acknowledgements

Part of the work was partially supported by a grant of the Romanian National Authority for

Scientific Research, CNCS – UEFISCDI, project number PN-II-RU-TE-2012-3-0202 and by the strategic grant POSDRU/159/1.5/S/133652, co-financed by the European Social Fund within the

Sectorial Operational Program Human Resources Development 2007 – 2013.


AdvPhotoCat2015



30

Surface recombination processes in silicon with nanostructured porous

layers formed by photocatalysis V.P. Kostylyov, V.V. Chernenko, D.V. Khomenko, R.M. Korkishko, T.V. Slusar,

V.M. Vlasyuk V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine

41, Nauka Ave., Kyiv 03680, Ukraine; tel: (+038044)525-57-88, e-mail: [email protected]

For the last years, the researches of nanostructured porous silicon and its optical and

passivating properties are conducted with great interest. It is caused by wide using of these

layers for photocatalytic reactions and due to that the optical properties of these layers

(effective refractive index, thickness) can be changed in a wide range by varying the

parameters of electrochemical process during their formation. Moreover, in the

electrochemical reaction hydrogen is released and can form covalent Si-H bonds with

surface atoms. Thus, extremely low values of surface recombination velocity can be

obtained. Consequently, there is a possibility at the same time to improve optical and

passivation properties of SC by forming nanostructured layers of porous silicon on its

surface. In this work the latter statement is experimentally investigated. The porous films

were formed on the front surface of back-contact back-junction silicon SC also called

interdigitated back contact (IBC) SC by photocatalysis using alcohol solutions of

hydrofluoric acid. IBC SC experimental samples were manufactured on n-type float-zone

silicon wafers with resistivity of 2 Ω⋅cm. Initially the front surface of the samples was

protected and passivated by a thermal SiO2 layer with thickness of 110 nm. The

illuminated current-voltage characteristics at AM1,5 standard test conditions and

photocurrent spectral dependencies at constant monochromatic power mode in the

wavelength range 400-1200 nm were measured on the IBC SC experimental samples. The

effective thickness and refractive index of formed porous layer were determined by

ellipsometry.

It was experimentally shown that the effective surface recombination velocity Sef on

silicon surface coated with thermal SiO2 film is high enough and this causing significant

recombination loss of light generated electron-hole pairs. Removing SiO2 film in an

aqueous HF solution does not affect significantly on the value of Sef, although the short-

circuit current Isc of IBC SC decreases by increasing the light reflection coefficient.

Formation of microporous silicon films on the front surface of IBC SC results in surface

recombination velocity decreasing due to the surface recombination centers neutralization

by hydrogen atoms released during the electrochemical reaction. The neutralization effect

becomes more pronounced with increasing of micropores depth, reducing their diameter,

as well as reducing the time interval between the electrochemical formation process and

photoelectric measurements. On the other hand, on the IBC SC surface with microporous

silicon film the depletion layer with reduced majority carrier’s concentration is formed,

where in case of small radiation powers the recombination velocity is significantly

increased. Increasing of the light intensity leads to the decreasing of recombination

velocity in space charge region and to the corresponding Isc increasing. Thus, applying the

nanoporous silicon films as passivation layers can only be effective for IBC SC operating

at medium and high irradiation levels.


AdvPhotoCat2015



31

Encapsulated Co(II) homodinuclear coordinative compound with

terephthalate bridge for styrene catalytic oxidation C. Blegescu

1, D. Ganju

1, S. Shova

2, D. Humelnicu

1*,

1„Al.I. Cuza” University of Iasi, Faculty of Chemistry, Romania 2State University, Chisinau, Moldova

Corresponding author e-mail: [email protected]

Homodinuclear coordinative compound of Co(II) with terephthalate bridge and o-

phenantroline has been synthesized1. The coordinative compound was characterized by

FT-IR and UV-Vis spectroscopy, thermal analysis and molecular structure was established

by single crystal X – ray diffraction technique. The resulted compound was immobilized

on functionalized silica with tiol groups and tested from point of view of catalytic activity

in oxidation of styrene. The catalyst has been tested for the oxidation of styrene in presence

of H2O2 as oxidation reagent.

Fig.1. Crystal packing of [Co2(TF)(o-phen)4](TF).

The catalytic activity of the synthesized compound encapsulated on the functionalized

silica matrix was evaluated in the oxidation of the double bond neighboring benzene ring

in styrene molecule2. It is noted that the selectivity of the reaction is maintained

approximately 10 hours after the production of the benzoic aldehyde combined with the

existence of an excess of oxidant in the system leads to benzoic acid and 2-phenyl-ethan-1-

ol as by-products.

1. P. Oliveira, A. Machado, A.M. Ramos, I. Fonseca, F.M. Braz Fernandes, A.M. Botelho do

Rego, J. Vital, Microp. and Mesop. Mat. 120 (2009) 432–440

2. S. Rao, K.N.Munshi, N.N. Rao Journal of Molecular Catalysis A: Chemical 156 (2000), 205-211


AdvPhotoCat2015



32

Flexible electroconductive layers as current collectors for photovoltaic

and photoelectrochemical devices Ilona Senyk, Viacheslav Barsukov, Bogdan Savchenko, Yurii Shpak, Dmytro Drahan

Department for Electrochemical Power Engineering & Chemistry

Kyiv National University of Technologies and Design

Nemirovich-Danchenko street, 2 Kyiv 01011, Ukraine

E-mail:[email protected]

The different multilayer’s optical devices need a flexible and strong electro-conductive

layer as a current collector. It is especially actual now for organic solar cells (OSC), some

photovoltaic (PV), photocatalytical (PC) and photoelectrochemical (PE) devices.

We have synthesized and studied a fairly wide range of composite materials in order to

ensure quite high conductivity, mechanical and chemical stability, adhesion ability to

formation of further photo-sensitive, catalytically active and other functional layers in

multilayer photovoltaic devices.

For this target we have studied the following two groups of composite materials: (1) PVC

composites filled with various carbon-containing fillers (graphene, graphite, thermally

expanded graphite, acetylene black, graphitized carbon black, carbon nanotubes). A

concentration of filler was ranged in diapason from 5 to 20%;

(2) carbon cloth: a standard and modified by some nano-metal particles (e.g., by

nanoparticles of Fe, Ni, Cu, Ag, etc.).

Besides the direct measurements of conductivity, the samples of materials were fixed

between the horn antennas of transmitter and receiver of electromagnetic radiation at

certain distances. Evaluating the effectiveness of the electromagnetic energy absorption,

which depends on conductivity, was carried out by comparing the measured values of the

transmittance and reflectance modules.

Our investigations have shown that the electronic conductivity of the materials of group (2)

is significantly higher than the conductivity of group (1). It is easy to understand, taking

into account the presence of reliable, quite conductive and stable internal skeleton of

conductivity in carbon cloth. Carbon-containing fillers (graphene, graphite, thermally

expanded graphite, acetylene black, graphitized carbon black, carbon nanotubes) also

forms so called “percolation cluster” under the definite content of filler, but conductivity of

such cluster is usually lower than conductivity and durability of mechanically interlaced

fibers of carbon cloth. Nevertheless, even electric conductivity of the conventional carbon

cloth is usually insufficient to photovoltaic devices, particularly at high current densities,

where part of the energy consumed in heating the fabric.

We have shown, that modification of carbon cloth by some nanometal particles can

increase its conductivity sufficiently. Such modification could be made by the consecutive

impregnation of the conventional carbon cloth from the solutions, which contain such

nano-metal particles.

We suppose that such flexible, strong and quite electroconductive layers, based on the

carbon cloth modified by nanometal particles, could find a practical application for OSC,

PV, PC, and PE devices.

AdvPhotoCat2015



33

Development of novel multilayered textile support for organic solar cells V. Vlasenko, S. Arabuli, I. Senik

Kiev National University of Technologies and Design / Kiev, Ukraine

[email protected]

Advantages of textile substrate are: flexibility; possibility to use textile technologies of

production (for example, roll-to-roll); possibility to get organic solar cells (OSCs) of

considerable sizes; OSCs on textile supports are easy in use and in storage.

The main tasks of the work are: to define the requirements to basic performances of textile

support for OSCs; to develop the approach to creation of textile substrate for OSCs; to

consider some possible methods to bring the conductive layer on textile substrate (for

example, vacuum deposition of metals or polyaniline deposition; thin knitting fabric from

metallic wires).

Textiles suitable as a substrate for OSCs must satisfy the following requirements:

– high physical and mechanical properties and isotropy of these properties;

– resistance to atmospheric conditions;

– high chemical resistance;

– sufficient flexibility;

– the surface of the textile must be suitable for putting necessary layers that provide

photovoltaic properties (satisfactory adhesion to the surface modifying layers);

– hydrophobicity (low water absorption) waterproof (for the top layer).

We suggest using as a substrate for solar cells multilayered composite polyester (PES)

textile materials. Our investigations have shown, multilayered substrates provide isotropy

of physic-mechanical properties, opportunity (if necessary) to modify intermediate layers;

textiles of PES have a high chemical stability, are resistant to different weather conditions

and compared with polypropylene fibers are wetted better.

In principle, the multilayered textile structures for PV-application allow modification one

or two surfaces of each layer before bonding. It is also important that is possible to use for

modification the different methods:

– vacuum deposition of metals (Ag, Cu, Fe, Al) on different fabrics;

– deposition of polyaniline on different fabrics;

– dispersion of metals in some liquid medium (for example, melt of surface-active

substances by method an electric arc; by subsequent introduction of this dispersion in the

fiber forming polymer melt before fiber spinning);

– using of knitting fabric from metallic thin wires;

– deposition of photo-active substance on the first layer.

We consider that multilayered textile structures (textile composite materials) are

perspective for using as organic SCs supports. The investigations in this direction we

consider as potential fruitful.


AdvPhotoCat2015



34

List of participants Surname Name Afiliation Email

Adomnitei Catalin Faculty of Physics, Alexandru

Ioan Cuza University of Iași,

Romania

[email protected]

Adomnitei Paula

Gabriela

FEEA Alexandru Ioan Cuza

University of Iași, Romania [email protected]

Barsukov Viacheslav Department for

Electrochemical Power

Engineering & Chemistry, Kyiv

National University of

Technologies and Design,

Nemirovich-Danchenko street,

2 Kyiv 01011, Ukraine

[email protected]

Bucur Stefan Faculty of Chemistry,

Alexandru Ioan Cuza

University of Iași, Romania

[email protected]

Carja Gabriela Department of Chemical

Engineering, Faculty of

ChemicalEngineering and

Environmental Protection,

Technical University “Ghe.

Asachi” of Iasi, Bd. D.

Mangeron no 71, Iasi, 700554,

Romania,

[email protected]

Chiarello Gian Luca Dipartimento di Chimica,

Università degli Studi di

Milano, via Golgi 19, 20133

Milano, Italy

[email protected]

Coromelci Cristina Laboratory of Materials

Chemistry, Department of

Chemistry, ”Al. I. Cuza”

University, Boulevard, Carol I,

No 11, 700506, Iasi, Romania

Dancilă Annette-

Madelene

University POLITEHNICA of

Bucharest, Faculty of Applied

Chemistry and Materials

Science, 1-7 Polizu Street,

011061, Bucharest Romania

Dillert Ralf Institut für Technische Chemie,

Gottfried Wilhelm Leibniz

Universität Hannover Callinstr.

3, 30167 Hannover, Germany

[email protected]

Dîrţu Alin Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Dîrţu Daniela Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Enachescu Cristian Faculty of Physics, Alexandru


Romania

[email protected]

Geru Ion Institute of Chemistry of the

Academy of Sciences of

Moldova, Chishinau, Moldova

[email protected]

Hernadi Klara Research Group of

Environmental Chemistry,

Institute of Chemistry,

University of Szeged

[email protected]

Humelnicu Doina Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Humelnicu Ionel Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]














AdvPhotoCat2015



35

Iacomi Felicia

Iacomi

Faculty of Physics, Alexandru


Romania

[email protected]

Ignat Maria Ignat Petru Poni” Institute of

Macromolecular Chemistry,

41A, Gr. Ghica Voda Alley,

700487 Iasi, Romania si

UAIC

[email protected]

Katsarakis Nikolaos Institute of Electronic Structure

and Laser, Foundation for

Research & Technology-Hellas,

Crete, Greece

[email protected]

Korkishko R.M. V. Lashkaryov Institute of

Semiconductor Physics, Nat.

Acad. of Sci. of Ukraine

[email protected]

Mangalagiu Ionel Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

McCormack Declan E. Centre for Research in

Engineering Surface

Technology (CREST), FOCAS

Institute, Dublin Institute of

Technology, Kevin St, Dublin 8,

Ireland

[email protected]

Mocanu Alexandra University Politehnica of

Bucharest, Department of

Bioresources and Polymer

Science

[email protected]

Orbeci Cristina University POLITEHNICA of





[email protected]

Pal Iuliana Nitech

Papadimitriou Vassileios C. Laboratory of Photochemistry

and Kinetics, Department of

Chemistry, University of Crete,

71003 Heraklion, Crete, Greece

[email protected]

Pascariu Petronela ”Petru Poni” Institute of

Macromolecular Chemistry,

41A Gr. Ghica Voda Alley, Iaşi

700487, Romania

[email protected]

Pemble Martyn Tyndall National Institute

University College Cork, ‘Lee

Maltings’ Dyke Parade, Cork,

Ireland

[email protected]

Popescu Sebastian Faculty of Physics, Alexandru


Romania

[email protected]

Prodan Ioana Deputy chairman ASDB,

Multidisciplinary

Coordinator EFdeN

Project (EFdeN-Solar

Decathlon Europe 2014),

Romania

[email protected]

Pui Aurel Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Reli Martin Institute of Environmental

Technology, VŠB-TU Ostrava,

17. listopadu 15/2172, 708 33,

Ostrava, Czech Republic

[email protected]
















AdvPhotoCat2015



36

Remediakis Ioannis N. Dept. of Materials Science and

Technology, University of

Crete, 71003 Heraklion, Greece

and Institute of Electronic

Structure and Laser (IESL),

Foundation for Research and

Technology Hellas (FORTH),

71110 Heraklion, Greece

[email protected]

Rimbu Cristina Agricultural Sciences and

Veterinary Medicine University,

Faculty of Veterinary Medicine,

Iasi

[email protected]

Rusen Edina Department of Bioresources

and Polymer Science,

University Politehnica of

Bucharest

[email protected]

Senyk Ilona Department for

Electrochemical Power

Engineering & Chemistry, Kyiv

National University of

Technologies and Design,

Nemirovich-Danchenko street,

2 Kyiv 01011, Ukraine

[email protected]

Şuchea Mirela Faculty of Chemistry,

Alexandru Ioan Cuza

University of Iași, Romania and

Center of Materials Technology

and Laser, School of Applied

Technology, Electrical

Engineering Department,

Technological Educational

Institute of Crete, Heraklion,

Greece

[email protected]

Ştefan Daniela

Simina

University POLITEHNICA of





Tavares Carlos Jose Centre of Physics, University of

Minho, Guimarães, Portugal [email protected]

Tudose I. V. Faculty of Chemistry,

Alexandru Ioan Cuza


Center of Materials Technology


Technology, Electrical

Engineering Department,

Technological Educational

Institute of Crete, Heraklion,

Greece

[email protected]

Vatră Vasile Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Vatră Angela Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Vernardou Dimitra Center of Materials Technology


Technology, Technological

Educational Institute of Crete,

710 04 Heraklion, Crete,

Greece

[email protected]

Vesborg Peter C. K. Experimental surface - and

nanomaterials physics,

Department of Physics,

Technical University of

Denmark

[email protected]












AdvPhotoCat2015



37

Vîrlan Constantin Faculty of Chemistry,

Alexandru Ioan Cuza


[email protected]

Vlasenko V. Kiev National University of

Technologies and Design /

Kiev, Ukraine

[email protected]

Vrinceanu Narcisa Faculty of Chemistry,

Alexandru Ioan Cuza


”Lucian Blaga” University

from Sibiu, Department of

Industrial Machines and

Equipments, Romania

[email protected]

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