The gas-photocatalytic degradation of trichloroethylene without water

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• 作者：Hong ; Liu ; Shao'an ; Cheng ; Jianqing ; Zhang ; Chunan ; Cao ; Weichuan ; Jiang
• 关键词：Gas Photocatalysis ; Trichloroethylene ; Degradation
• 刊名：Chemosphere
• 出版年：1997
• 期刊代码：15_00456535
• 类别：env
• 出版时间：December, 1997
• 卷：35
• 期：12
• 页码：2881-2889
• 文件大小：349 K

摘要

The photocatalytic degradation of gaseous trichloroethylene (TCE) without water has been studied. The degradation products were determined to be CO₂, HCl and Cl₂, and the reaction stoichiometry was described as C₂HCl₃ + 2O₂ HCl + 2CO₂ + Cl₂. The degradation rate was found to be linear with 0.16 power of the illumination intensity. When the TCE concentration was low (10⁻⁴ mol L⁻¹ or a little more), its degradation rate model could be considered as first order kinetics. A mechanism of valence band hole oxidation was proposed.