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International Journal of Photoenergy
Volume 2012 (2012), Article ID 469178, 12 pages
http://dx.doi.org/10.1155/2012/469178
Research Article

Sol-Gel-Hydrothermal Synthesis of the Heterostructured - Composite with High-Visible-Light- and Ultraviolet-Light-Induced Photocatalytic Performances

1Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
2Department of Technology, Beijing Tongfang Puri-Tech Co., Ltd., Beijing 100083, China

Received 15 July 2011; Accepted 22 August 2011

Academic Editor: Jinlong Zhang

Copyright © 2012 Jiang Zhang 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

The heterostructured TiO2/N-Bi2WO6 composites were prepared by a facile sol-gel-hydrothermal method. The phase structures, morphologies, and optical properties of the samples were characterized by using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS), and UV-vis diffuse reflectance spectroscopy. The photocatalytic activities for rhodamine B of the as-prepared products were measured under visible and ultraviolet light irradiation at room temperature. The TiO2/N-Bi2WO6 composites exhibited much higher photocatalytic performances than TiO2 as well as Bi2WO6. The enhancement in the visible light photocatalytic performance of the TiO2/N-Bi2WO6 composites could be attributed to the effective electron-hole separations at the interfaces of the two semiconductors, which facilitate the transfer of the photoinduced carriers.