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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 170148, 7 pages
http://dx.doi.org/10.1155/2014/170148
Research Article

Photocatalytic Degradation of Methylene Blue Using TiO2 Impregnated Diatomite

1School of Material Science and Technology, China University of Geosciences, Beijing 100083, China
2Geosciences Department, University of Wisconsin-Parkside, Kenosha, WI 53144, USA

Received 6 March 2014; Accepted 12 May 2014; Published 11 June 2014

Academic Editor: Hanlie Hong

Copyright © 2014 Ranfang Zuo 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

Nano-TiO2 showed a good catalytic activity, but it is easy to agglomerate, resulting in the reduction or even complete loss of photocatalytic activity. The dispersion of TiO2 particles on porous materials was a potential solution to this problem. Diatomite has high specific surface and absorbability because of its particular shell structure. Thus, TiO2/diatomite composite, prepared by loading TiO2 on the surface of diatomite, was a good photocatalyst, through absorbing organic compounds with diatomite and degrading them with TiO2. Scanning electron microscopy (SEM), energy dispersive spectrum (EDS), X-ray diffraction (XRD), chemical analysis, and Fourier transform infrared spectrometry (FTIR) indicated that TiO2 was impregnated well on the surface of diatomite. Furthermore, TiO2/diatomite was more active than nano-TiO2 for the degradation of methylene blue (MB) in solution. MB at concentrations of 15 and 35 ppm can be completely degraded in 20 and 40 min, respectively.