Citation: BI Dong-Qin, XU Yi-Ming. Influence of Iron Oxide Doping on the Photocatalytic Degradation of Organic Dye X3B over Tungsten Oxide[J]. Acta Physico-Chimica Sinica, ;2012, 28(07): 1777-1782. doi: 10.3866/PKU.WHXB201205113 shu

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 Date: 27 March 2012
Available Online: 11 May 2012
Fund Project: 国家自然科学基金(20873124) (20873124)国家重点基础研究发展规划项目(973) (2011CB936003)资助 (973) (2011CB936003)

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.
- Photocatalysis,
- Tungsten oxide,
- Iron oxide,
- Synergism,
- Organic dye,
- Degradation
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