Enhanced Photocatalytic Degradation of Methylene Blue over Hexagonal WO3/Graphene under Visible-Light Irradiation
- 作者: Wu D.1, Su X.1, Guo W.1
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隶属关系:
- School of Chemistry and Chemical Engineering
- 期: 卷 58, 编号 6 (2017)
- 页面: 710-719
- 栏目: Article
- URL: https://journals.rcsi.science/0023-1584/article/view/163519
- DOI: https://doi.org/10.1134/S0023158418010159
- ID: 163519
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详细
A series of composites containing hexagonal tungsten trioxide (h-WO3) and reduced graphene oxide (rGO) sheets are synthesized via a modified one-step hydrothermal route without assisted additive. The composites are characterized by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and UV-vis absorption spectroscopy. The new procedure made it possible to increase the reduction degree of GO. Based on the evidence presented hexagonal WO3 grows on the surface of graphene through chemical interactions with the surface. The visible-light photocatalytic degradation of methylene blue shows that the h-WO3/rGO composites exhibit superior photocatalytic performance of 96% with a maximum degradation rate achieved under visible-light irradiation for 6 h. The speculations concerning the mechanism of photocatalytic reactions are discussed. The improved photocatalytic activity can be accounted for by the increased adsorption toward chemical species, the enhanced light absorption and an efficient separation of photogenerated electron-hole pairs and transfer of charge carriers.
作者简介
Dongfang Wu
School of Chemistry and Chemical Engineering
编辑信件的主要联系方式.
Email: dfwu@seu.edu.cn
中国, Jiangning District, Nanjing, 211189
Xiaoxiao Su
School of Chemistry and Chemical Engineering
Email: dfwu@seu.edu.cn
中国, Jiangning District, Nanjing, 211189
Weiwei Guo
School of Chemistry and Chemical Engineering
Email: dfwu@seu.edu.cn
中国, Jiangning District, Nanjing, 211189
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