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International Journal of Photoenergy
Volume 2007, Article ID 13653, 8 pages
http://dx.doi.org/10.1155/2007/13653
Research Article

Photochemical Characterization and Photocatalytic Properties of a Nanostructure Composite TiO2 Film

1Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
2School of Chemical Engineering and Advanced Materials, University of Newcastle upon Tyne, Bedson Building, Newcastle NE1 7RU, UK

Received 28 March 2006; Revised 11 July 2006; Accepted 9 October 2006

Academic Editor: Sabry Abdel-Mottalab

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.

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 500C 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.