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Acta Physico-Chimica Sinica  2009, Vol. 25 Issue (08): 1703-1707    DOI: 10.3866/PKU.WHXB20090818
Article     
Preparation and Characterization of Bi1-xGdxVO4 Photocatalyst and Its Application toWater Splitting
WANG Qi-Zhao, JIANG Li, LIU Hui, YUAN Jian, CHEN Ming-Xia, SHI Jian-Wei, SHANGGUAN Wen-Feng
Research Center for Combustion and Environment Technology, Shanghai Jiaotong University, Shanghai 200240, P. R. China|College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
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Abstract  

Bi1-xGdxVO4(x=0, 0.1, 0.2, 0.3, 0.5, 0.7, 0.9, 1.0) solid oxide solutions were synthesized by a solid state reaction at high temperature and characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), BET surface area and scanning electron microscopy (SEM). XRD analysis of the Bi1-xGdxVO4 system showed the existence of two structures. For 0.3≤x≤1.0, the structure was of zircon-tetragonal type while the structure was scheelite-monoclinic when x=0. For 0.1<x<0.3, tetragonal and monoclinic structures were observed. Bi1-xGdxVO4 can split water into hydrogen when loaded with 0.3%(w) Pt. Furthermore, while Bi0.5Gd0.5VO4 was found to act as a photocatalyst for overall water splitting under UV light when loaded with RuO2, Pt/Cr2O3 and Rh/Cr2O3 we found that the photocatalyst loaded with Rh/Cr2O3 had the best photocatalytic property. The amounts of hydrogen and oxygen produced were about 48.22 and 24.13 μmol·h-1 under UV light irradiation, respectively. The photocatalytic activity for water splitting under visible light was also examined. This study indicated that the formation of a solid solution was a feasible method to adjust the conduction band and valence band to obtain a visible-light-driven photocatalyst.



Key wordsPhotocatalysis      Bi1-xGdxVO4      Visible      Water splitting      Solid solution     
Received: 07 February 2009      Published: 23 June 2009
MSC2000:  O643  
Corresponding Authors: SHANGGUAN Wen-Feng     E-mail: shangguan@sjtu.edu.cn
Cite this article:

WANG Qi-Zhao, JIANG Li, LIU Hui, YUAN Jian, CHEN Ming-Xia, SHI Jian-Wei, SHANGGUAN Wen-Feng. Preparation and Characterization of Bi1-xGdxVO4 Photocatalyst and Its Application toWater Splitting. Acta Physico-Chimica Sinica, 2009, 25(08): 1703-1707.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20090818     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2009/V25/I08/1703

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