inorganic and hybrid organic-inorganic materials for ...€¦ · inorganic and hybrid...
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Inorganic and Hybrid
Organic-Inorganic Materials
for Energy Saving
LABORATORIO DI SINTESI DI MATERIALI
INORGANICI
Massimiliano D’Arienzo
Barbara Di Credico
Roberto Scotti
2 0 n m2 0 n m 2 0 n m 2 0 0 n m
1 0 n m
5 0 n m 2 0 0 n m
5 n m0 . 2 µ m 2 0 n m
0 . 2 µ m
2 0 n m
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2
Argomenti di tesi
Oxide nanomaterials forphotocatalytic applications and gas sensing
Role of the Structure, Size and Morphology in
Upgrading the Functional Properties and
the Technological applications of Oxide Materials
New nanofillers forrubber reinforcement in tires
In collaboration withPirelli Tyre
Polymeric hybrid materials with dielectric properties
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Struttura della tesi
• Functional
properties
• Electronic and magnetic properties
Synthesis ofthe material
Structural & Morphological
characterization
Functionalcharacterization
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Oxide nanomaterials forPhotocatalytic application
and sensing
Synthesis
Solvothermal synthesis
Sol-gel synthesis
Characterizations Functional properties& Applications
XRD diffraction, SEM & TEM microscopySurface area
Shape-controlled TiO2
NOx abatement in air
Organic pollutant in water
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New nanofillers for rubber reinforcement in tires Characterizations Applications
XRD diffraction, SEM and TEM microscopy
In-situ and ex-situsynthesis (sol-gel, hydrothermal)
Stress-strain measurementsViscoelastic properties
Resistenza al rotolamento
Aderenza sul bagnatoResistenza all’abrasione
Aderenza sul bagnato
HD-Silica
Carbon Black
Rolling resistance
Abrasion resistance Wet gripAbrasion resistance
IMMOBILIZED RUBBER
NS-SilSepS9
•Synthesis of shape controlled silica NPs as filler for rubber reinforcement
•Anysotropic filler for rubber reinforcement (Phyllosilicates)
Synthesis
Aim: high-performance rubber composites
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•Synthesis of ZnO decorated silica NPs as activator for rubber vulcanization
2 0 n m 5 n m5 0 n m
100 nm100 nm
a) b) c)
d) e) f)
5 n m
d =0.26 nm
S8
curing additives
+
heating
ZnO
SiO2
rubber
•Silica based nanofiller-latex composites for green tyres compounds
Layered silicates in latex natural rubber
TEM
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Polymeric hybrid materials with dielectric properties
Advanced “molecular” fillers for rubber reinforcement
Nanocomposites enclosing PSQs with controlled cage-like or ladder-like structure and reactivefunctionalities (thiol or methacryl groups), which enable to modulate both the dielectric and thereinforcement properties of the composites
POSS/ladder-like nanounits with tailored structure and highly
reactive functional groups (-SH or methacryl)
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0,0 0,2 0,4 0,6 0,8 1,0
0
5
10
15
20
25
30
35
40
0 10 20 30
0,0000
0,0005
0,0010
0,0015
0,0020
0,0025
0,0030
Pore
volu
me / (
cm
3g
-1nm
-1)
Pore diameter / nm
Vo
lum
e a
dso
rbe
d S
TP
(cm
3 g
-1)
Relative pressure (P/P0)
Determination of the specific surface area (BET)
Pore size distribution (BJH)
Thermal decomposition and
weight loss
Other characterization techniques available
TGA-MSNitrogen Physisorption
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Proprietà elettroniche e magnetiche: Spettroscopia ESR
Vo
O2-
Vo Vo + e-
2 O2 + VO + e- 2 O2
-
SnO2
3250 3300 3350 3400 3450 3500 3550
R=100%
A=52% R=48%
A=39% R=61%
A=80% R=20%
H(Gauss)
A=100%
gain x 10
TiO2 + h → e-CB + h+
VB
Ti4+ + e-CB → Ti3+
O2- + h+VB → O-
TiO2
Ti3+
O- • The type, abundance and
stability of the paramagnetic
centers are relatable to
photocatalytic efficacy and to
the sensing properties
Info about catalytic and
sensing mechanisms