Structure and properties of flouroalkylsilane treated nano-titania

Pazokifard, Shahla, Mirabedini, Seyed Mojtaba, Esfandeh, Masoud and Farrokhpay, Saeed (2011). Structure and properties of flouroalkylsilane treated nano-titania. In: Chemeca 2011 Proceedings. Chemeca 2011: Australasian Conference on Chemical Engineering, Sydney, Australia, (1-10). 18-21 September 2011.

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Author Pazokifard, Shahla
Mirabedini, Seyed Mojtaba
Esfandeh, Masoud
Farrokhpay, Saeed
Title of paper Structure and properties of flouroalkylsilane treated nano-titania
Conference name Chemeca 2011: Australasian Conference on Chemical Engineering
Conference location Sydney, Australia
Conference dates 18-21 September 2011
Proceedings title Chemeca 2011 Proceedings
Place of Publication Barton, ACT, Australia
Publisher Engineers Australia
Publication Year 2011
Sub-type Fully published paper
ISBN 9780858259225
Start page 1
End page 10
Total pages 10
Collection year 2012
Language eng
Abstract/Summary Nano-TiO2 was treated with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (fluorosilane) as a hydrophobic specious, under different pH conditions. The treated particles were characterized using Fourier transform infrared technique, Thermal gravimetric analysis, X-ray photoelectron and transmission electron spectroscopy, and zeta potential measurements. Morphology of the adsorbed fluorosilane is studied by X-ray diffraction spectroscopy. Reflectance spectra were obtained using diffuse reflectance spectroscopy and band gap energy of the various nanoparticles. Then the fluorosilane treated TiO2 nanoparticles were added to acrylic polymer to make self-clean facade paint. The results showed that fluorosilane is adsorbed on the surface of TiO2 nanoparticles in both neutral and basic media. A very low concentration of fluorosilane (about 0.5 mmol/g TiO2) is needed to provide hydrophobicity on the surface of the nanoparticle. The values of band gap energy for all fluorosilane treated nanoparticles were almost identical, in the range of 3.10-3.18 eV. Photocatalytic activity of the coating films were also studied by photo-activated degradation reaction of Rhodamine B dyestuff on the surface of the coating films.
Keyword TiO2 nanoparticles
Fluoroalkylsilane
Surface treatment
Photocatalysis
Hydrophobic
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 22 Sep 2011, 13:52:34 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre