Photochemical Characterization and Photocatalytic Properties of a Nanostructure Composite <mml:math id="E1" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mtext>TiO</mml:mtext></mml:mrow><mml:mtext mathvariant="bold">2</mml:mtext></mml:msub></mml:mrow></mml:math> Film

Habibi, Mohammad Hossein; Esfahani, Mojtaba Nasr; Egerton, Terry A.

doi:https://doi.org/10.1155/2007/13653

International Journal of Photoenergy

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Research Article | Open Access

Volume 2007 | Article ID 013653 | https://doi.org/10.1155/2007/13653

Photochemical Characterization and Photocatalytic Properties of a Nanostructure Composite TiO2 Film

Mohammad Hossein Habibi,¹Mojtaba Nasr Esfahani,¹and Terry A. Egerton²

Academic Editor: Sabry Abdel-Mottalab

Received28 Mar 2006

Revised11 Jul 2006

Accepted09 Oct 2006

Published21 Dec 2006

Abstract

An efficient and new composite titania film photocatalyst was fabricated by sol-gel technique, using precalcined nanopowder titanium dioxide filler mixed with a sol, spin coating, and heat treatment. The structural and photocatalytic properties of these films were characterized using SEM, XRD, and UV/Vis spectroscopies. Problems of film inhomogenity and defects which caused peeling and cracking during calcination because of film shrinkage were overcome by using methylcellulose (MC) as a dispersant. Composite films heat-treated at approximately 500∘C have the greatest hardness values. Surface morphology of composite deposits by scanning electron microscopy (SEM) showed that the composite films have much rougher surface than films made without MC. Photocatalytic activities of the composites film were evaluated through the degradation of three commercial diazo textile dyes, Light Yellow X6G (C.I. Reactive Yellow 2), Solophenyl red 3BL (C.I. Direct 80), and Tertrodirect light blue R (C.I. Direct blue 71) as a model pollutant.

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Copyright © 2007 Mohammad Hossein Habibi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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