The synthesis of 3D Bi2WO6/TiO2 heterojunction photocatalysts and enhanced photocatalytic activity

被引：0
作者：
Zhu, Zhen-Feng [1 ]
Wang, Yu [1 ]
Li, Jun-Qi [1 ]
Li, Guang-Jun [1 ]
Guo, Zhan-Yun [1 ]
机构：
[1] School of Materials Science and Engineering, Shaanxi University of Science and Technology
来源：
Gongneng Cailiao/Journal of Functional Materials | 2013年 / 44卷 / 16期
关键词：
Flower-like Bi[!sub]2[!/sub]WO[!sub]6[!/sub; Heterojunction; Immersion method; Photocatalysis; RhB;
D O I：
10.3969/j.issn.1001-9731.2013.16.008
中图分类号：
学科分类号：
摘要：
3D multicomponent Bi2WO6/TiO2 composite heterojunction photocatalysts were prepared by the dipping method and followed by TiO2 particles layer-by-layer deposited on the surface of flower-like Bi2WO6 superstructures. The prepared TiO2, Bi2WO6 and Bi2WO6/TiO2 heterojunction photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis diffuse reflectance spectra, and photoluminescence(PL), respectively. Meanwhine, the photocatalysts activity of the prepared catalysts was evaluated by photocatalytic degradation of RhB solution under 500W Xe lamp light irradiation. The results show that the photocatalytic activity of Bi2WO6/TiO2 heterojunction photocatalytic was superior to that of pure TiO2 and Bi2WO6. When the content was 15wt%TiO2, the composite photocatalyst most effectively promote the separation of electrons and holes and result in an increase with photocatalytic activity. The special interface of the formation of heterojunction can significantly reduce the recombination of photogenerated electron and hole pairs and show the higher light-harvesting ability.
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页码：2324 / 2328
页数：4
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