Synthesis and Characterization of Silver-Titanium Nanocomposite via Horizontal Vapor

Phase Growth (HVPG) Technique

Muhammad A. Muflikhun1, Gil N. Santos2, Alvin Y. Chua1

1 Mechanical Engineering Department, De La Salle University, Manila 2 Physics Department, De La Salle University, Manila

Background

• Silver and Titanium dioxide well-known as material that commonly used in medical applications because of its anti-bacterial property.

• Existing methods applied to synthesis Silver or Titanium dioxide as single material already published in many journals and paper presentations.

• Silver Nanomaterials can be synthesized by Green synthesis, Electrospinning method, Microwave heating method, Facile synthesis methods, and Electrochemical method.

• Titanium dioxide Nanomaterials also can be synthesized by Sol-gel method, the Micelle and Inverse Micelle method, the Sol Method, the Hydrothermal method, the Solvothermal method, the Direct Oxidation (DO) method, the Chemical Vapor Deposition (CVD) method, the Physical Vapor Deposition (PVD) method, the Electrodeposition method, the Sonochemical method, and the Microwave method.

Background

• Existing synthesis methods have disadvantages in term of :

1. Process (Uses multi process)

2. Non solid state (deposit in the liquid form)

3. Price (Expensive compare with amount of nanomaterials produced)

4. Have pollutants in the final result

HVPG (Horizontal Vapor Phase Growth)

• HVPG methods is a new methods uses 2 materials of synthesis nanomaterials in a single process.

• HVPG have advantages in term of:

1. Process (Use Single Process)

2. Price (Cheaper compare with others methods)

3. The result is a pure materials as same as source materials

4. Non pollutants result

Methodology

• HVPG Technique Methods

1. A mixture of 17.5 mg of Silver (Ag) powder and 17.5 mg of Titanium dioxide (TiO2) powder.

2. Loaded 2 materials in 9 Different tubes.

3. Each tube the evacuated in Thermionic High Vacuum System (THVC) with a pressure around 10-6 Torr (133.32μPa).

4. Sealed the tube using LPG-Oxygen blowtorch.

5. Baked tubes in Horizontal Furnace.

6. The morphology and Chemical composition will characterized by Scanning Electron Microscopy (SEM) and Elemental Dispersive X-ray (EDX) analysis using a JEOL JSM-5310 Scanning Electron Microscope.

HVPG Technique

Parameter of Study • This study containing 9 parameters base from Temperature

and Time baking

No.

Tubes Temp. (°C) Baking Time (h)

1 800 4

2 800 6

3 800 8

4 1000 4

5 1000 6

6 1000 8

7 1200 4

8 1200 6

9 1200 8

Result and Discussion (Tube 1, Tube 2, and Tube 3)

Result and Discussion (Tube 4 and Tube 5)

Result and Discussion (Tube 6)

In tube 6 there are plenty of nanorods with sharp edges in tube 6, the tube baked at 1000°C for 8 hours.

Result and Discussion (Tube 7)

Result and Discussion (Tube 8 and Tube 9)

Result and Discussion

• Range size of nanomaterials in different tube

Tubes Result Size (µm)

1 Micro-Nano Composite 0.16 - 7.37

2 Micro-Nano Composite 0.3 - 3.57

3 Micro-Nano Composite 0.82 - 3.32

4 Micro-Nano Composite 0.34 - 1.43

5 Nano-composite 0.45 - 0.69

6 Nano-composite 0.38 - 0.67

7 Micro-Nano Composite 0.84 - 7.69

8 Micro-Nano Composite 0.52 - 4.79

9 Micro-Nano Composite 0.6 - 8.43

Conclussion

• This research presents the successful synthesis of Silver-titanium dioxide micro- and nano- composite nanomaterials at different growth temperatures and growth times.

• The method employed was the Horizontal Vapor Phase Growth (HVPG) technique.

• The result of materials form are nanoparticles, nanosphere, nanotriangulars, and nanorods, also reveal micro- materials such as microtriangulars, microparticles and microrods.

Acknowledgements

• The authors state their gratitude to Solid State Physisc Lab, Physics Department, Mechanical Engineering Department De La Salle University also from AUN SEED NET Founding for supported this paper.