Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (07): 1777-1782.doi: 10.3866/PKU.WHXB201205113

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Influence of Iron Oxide Doping on the Photocatalytic Degradation of Organic Dye X3B over Tungsten Oxide

BI Dong-Qin, XU Yi-Ming   

  1. Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
  • Received:2012-03-27 Revised:2012-05-11 Published:2012-06-07
  • Contact: XU Yi-Ming E-mail:xuym@css.zju.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20873124) and National Key Basic Research Program of China (973) (2011CB936003).

Abstract:

Development of a highly active visible-light-driven photocatalyst is a challenge for chemical use of solar energy. In this work, WO3 was simply mixed with Fe2O3, and used thereafter for the photocatalytic degradation of organic dye X3B in the presence of H2O2. It was observed that the composite activity was greatly influenced by the catalyst sintering temperature, and by Fe2O3 content in the mixed oxide. The optimum sintering temperature and Fe2O3 loading were 400 ° C and 1.0% (w), respectively. Through a spin trapping electron paramagetic spectroscopy, it was found that the composite produced a significantly larger amount of hydroxyl radicals, in relative to Fe2O3 and WO3. It is proposed that the observed synergistic effect between Fe2O3 and WO3 is due to the charge transfer between the two oxides, improving the separation of the photogenerated charge carriers, and thus accelerating the photocatalytic degradation of X3B.

Key words: Photocatalysis, Tungsten oxide, Iron oxide, Synergism, Organic dye, Degradation

MSC2000: 

  • O643