Photocatalytic hydrogen generation in the presence of chloroacetic acids over Pt/TiO2

被引：138
作者：
Li, Yuexiang [1 ]
Me, Yanzhao
Peng, Shaoqin
Lu, Gongxuan
Li, Shuben
机构：
[1] Nanchang Univ, Dept Chem, Nanchang 330047, Jiangxi, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
来源：
CHEMOSPHERE | 2006年 / 63卷 / 08期
关键词：
photocatalysis; hydrogen; organic pollutants; decomposition of chloroacetic acids;
D O I：
10.1016/j.chemosphere.2005.09.004
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In the presence of chloroacetic acids, the photocatalytic hydrogen evolution and decomposition of the pollutants over Pt/TiO2 have been investigated. The Pt/TiO2 was prepared by photodeposition. Monochloroacetic acid and dichloroacetic acid enhance photocatalytic hydrogen generation, whereas trichloroacetic acid does not. The photocatalytic oxidation of monochloroacetic acid and dichloroacetic acid mainly produces CO2, HCl and formaldehyde, whereas the photocatalytic oxidation of trichloroacetic acid mainly produces CO2 and HCl. The effect of the concentration of monochloroacetic acid and dichloroacetic acid on the hydrogen generation rate is consistent with a Langmuir-Hinshelwood kinetic model. A possible reaction mechanism was discussed. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：1312 / 1318
页数：7
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