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Journal of Nanomaterials
Volume 2012, Article ID 621254, 6 pages
http://dx.doi.org/10.1155/2012/621254
Research Article

Effect of Preparation Parameters on Photoactivity of BiVO4 by Hydrothermal Method

State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received 19 June 2012; Revised 12 August 2012; Accepted 18 August 2012

Academic Editor: Jiaguo Yu

Copyright © 2012 Qingyun Chen 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

Bismuth vanadate (BiVO4) was synthesized from a mixture of aqueous Bi(NO3)3 and NH4VO3 solutions by using hydrothermal method. Via conducting the orthogonal experiments and single-factor experiments, the best synthetic parameters were determined. The physical and photophysical properties of the as-obtained samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-Vis diffusion reflectance spectroscopy (UV-Vis). The result showed that the best experimental parameters of monoclinic BiVO4 were ,  °C, and  h. The catalytic performance of BiVO4 was evaluated by reducing carbon dioxide to methane under visible light irradiation. It was found that the methane production reached 145 μg/g-cat after 5 h irradiation with the catalyst dosage of 0.15 g in 200 mL mixed solution of 0.1 M NaOH and 0.1 M Na2SO3.