Fe2O3掺杂对WO3光催化降解有机染料X3B的影响

doi:10.3866/PKU.WHXB201205113

物理化学学报 >> 2012, Vol. 28 >> Issue (07): 1777-1782.doi: 10.3866/PKU.WHXB201205113

Fe₂O₃掺杂对WO₃光催化降解有机染料X3B的影响

毕冬琴, 许宜铭

浙江大学化学系, 杭州 310027

收稿日期:2012-03-27 修回日期:2012-05-11 发布日期:2012-06-07
通讯作者: 许宜铭 E-mail:xuym@css.zju.edu.cn
基金资助:
国家自然科学基金(20873124)和国家重点基础研究发展规划项目(973) (2011CB936003)资助

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

BI Dong-Qin, XU Yi-Ming

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).

摘要/Abstract

摘要：

发展高效的可见光催化剂是太阳能化学利用的一个挑战. 本文采用简单的混合方法, 制备了WO₃和Fe₂O₃的混合物, 研究了该复合氧化物在H₂O₂存在下光催化降解有机染料X3B的活性. 实验表明, 催化剂的光催化活性与其煅烧温度和Fe₂O₃含量有关. 最佳煅烧温度和Fe₂O₃含量分别等于400 °C 和1.0% (w). 根据自由基捕获电子顺磁共振(EPR)波谱分析, 复合氧化物产生羟基自由基的量远高于Fe₂O₃和WO₃. 我们推测, 这种协同效应来源于WO₃和Fe₂O₃之间的电荷转移, 从而加快半导体光生载流子的分离和X3B的光催化降解.

关键词: 光催化, 氧化钨, 氧化铁, 协同效应, 有机染料, 降解

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

毕冬琴, 许宜铭. Fe₂O₃掺杂对WO₃光催化降解有机染料X3B的影响[J]. 物理化学学报, 2012, 28(07): 1777-1782.

BI Dong-Qin, XU Yi-Ming. Influence of Iron Oxide Doping on the Photocatalytic Degradation of Organic Dye X3B over Tungsten Oxide[J]. Acta Phys. -Chim. Sin., 2012, 28(07): 1777-1782.

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Fe₂O₃掺杂对WO₃光催化降解有机染料X3B的影响

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

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