A new route for degradation of volatile organic compounds under visible light:: Using the bifunctional photocatalyst Pt/TiO2-xNx in H2-O2 atmosphere

被引：80

作者：

Li, Danzhen ^{[1
]}

Chen, Zhixin ^{[1
]}

Chen, Yilin ^{[1
]}

Li, Wenjuan ^{[1
]}

Huang, Hanjie ^{[1
]}

He, Yunhui ^{[1
]}

Fu, Xianzhi ^{[1
]}

机构：

[1] Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Breeding Base Photocatalysis, Fuzhou 350002, Peoples R China

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2008年 / 42卷 / 06期

关键词：

D O I：

10.1021/es702465g

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The bifunctional photocatalyst Pt/TiO2-xNx has been successfully prepared by wet impregnation. The properties of Pt/TiO2-xNx have been investigated by diffuse reflectance spectra, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, a photoluminescence technique with terephthalic acid, and electric field induced surface photovoltage spectra. The photocatalytic activity of the sample was evaluated by the decomposition of volatile organic pollutants (VOCs) in a H-2-O-2 atmosphere under visible light irradiation. The results demonstrated that nitrogen-doped and platinum-modified TiO2 in a H-2-O-2 atmosphere could enormously increase the quantum efficiency of the photocatalytic system with excellent photocatalytic activity and high catalytic stability. The increased quantum efficiency can be explained by enhanced separation efficiency of photogenerated electron-hole pairs, higher interface electron transfer rate, and an increased number of surface hydroxyl radicals in the photocatalytic process. A mechanism was proposed to elucidate the degradation of VOCs over Pt/TiO2-xNx in a H-2-O-2 atmosphere under visible light irradiation.

引用

页码：2130 / 2135

页数：6

共 34 条

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