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International Journal of Chemical Engineering
Volume 2012 (2012), Article ID 215373, 5 pages
http://dx.doi.org/10.1155/2012/215373
Research Article

Effect of Additives on Characterization and Photocatalytic Activity of T i o ๐Ÿ /ZnO Nanocomposite Prepared via Sol-Gel Process

1Department of Chemistry, Tehran North Branch, Islamic Azad University, Tehran 1913674711, Iran
2Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran

Received 1 December 2011; Accepted 6 January 2012

Academic Editor: Donald L. Feke

Copyright © 2012 Shahram Moradi 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

TiO2/ZnO nanocomposites were prepared by the sol-gel method with and without addatives such as carboxy methyl cellulose (CMC), poly(ethylene glycol) (PEG), polyvinylpyrrolidon, (PVP), and hydroxylpropylcellulose (HPC). The characteristics of the prepared TiO2/ZnO nanocomposites were identified by IR spectra, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) methods. The additives have a significant effect on the particle size distribution and photocatalytic activity of TiO2/ZnO nanocomposites. The photocatalytic activity of the synthesized nanocomposites was investigated for decolorization of methyl orange (MO) in water under UV-irradiation in a batch reactor and the results showed that the photocatalytic activity of the nanocomposites have been increased by CMC, PEG, PVP, and HPC, respectively. SEM has shown that the particle size distribution of TiO2/ZnO nanocomposite in the presence of HPC was better than the other samples.