Increasing the catalytic activities of iodine doped titanium dioxide by modifying with tin dioxide for the photodegradation of 2-chlorophenol under visible light irradiation

被引：42

作者：

He, Zhiqiao ^{[1
]}

Wang, Cheng ^{[1
]}

Wang, Hongyu ^{[2
]}

Hong, Fangyue ^{[1
]}

Xu, Xinhua ^{[3
]}

Chen, Jianmeng ^{[1
]}

Song, Shuang ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Biol & Environm Engn, Hangzhou 310032, Zhejiang, Peoples R China

[2] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou 310032, Zhejiang, Peoples R China

[3] Zhejiang Univ, Coll Environm & Resource Sci, Hangzhou 310029, Zhejiang, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 189卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

TiO2; SnO2; Iodine; Photocatalysis; 2-Chlorophenol; PHOTOCATALYTIC DEGRADATION; AZO-DYE; TIO2; PHOTOCATALYST; DECOMPOSITION; NANOPARTICLES; PHENOL; RATES; MECHANISM; PLATINUM; PHASE;

D O I：

10.1016/j.jhazmat.2011.02.077

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

The photocatalytic degradation of 2-chlorophenol (2-CP) irradiated with visible light over iodine doped TiO2 (IT) modified with SnO2 (SIT) nanoparticles has been investigated in this study. The structure and optical properties of the SIT catalysts have been well characterized by X-ray diffraction, the Brunauer-Emmett-Teller method, transmission electron microscopy, UV-visible absorption spectra and X-ray photoelectron spectroscopy. The effects of preparation conditions, such as SnO2 content and calcination temperature, on the photocatalytic degradation efficiency have been surveyed in detail. The improved photocatalytic activity of SIT is derived from the synergistic effect between the SnO2 and IT, which promoted the efficiency of migration of the photogenerated carriers at the interface of the catalysts and thereby enhanced the efficiency of photon harvesting in the visible region. The action of scavengers (fluoride ion, iodide ion, tert-butyl alcohol, and persulfate ion), as well as N-2 purging on the photodegradation rate reveal that the valence band hole is mainly responsible for the effective photocatalytic removal of 2-CP and the corresponding TOC reduction. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：595 / 602

页数：8

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