| Effect of Chemical Treatment on TiO2 Particles by IMPS |
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| 作者姓名： | 尹峰 林原 林瑞峰 李学萍 肖绪瑞 |
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| 作者单位： | CenterforMolecularScience,InstituteofChemistry,ChineseAcademyofSciences,Beijing100080,china |
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| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .2 98730 5 7) ,NationalResearchFundforFoundamentalKeyProject (No .G2 0 0 0 0 2 82 0 5 )andtheInnovativeFoundationofChineseAcademyofSciences (No .KGCX2 30 3 0 2) |
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| 摘 要： | The photodegradation reaction rate of CHCl3 in TiO2 particulate suspension was imperoved significantly by HCl-treatment.The effect of HCl-treatment on the photocatalytic activity of TiO2 was strdied in a PEC cell by using Intensity-Modulated Photocurrent Spectroscopy(IMPS).The magntude of photocurrent response and the characteristic frequencies of the upper and lower semicircles in the complex plane of IMPS response were analyzed,and the ccathodic and anodic reaction processes of photogenerated holes and electrons were discussed.The increases in the cathodic and anodic photocurrent response and in the time constants of both cathodic and anodic reaction processes of photogenerated holes and electrons were discussed.The increases in the cathodic and anodic photocurrent response and in the time constants of both cathodic and anodic reaction processes indicate that HCl-treatment leads to the improvement of the photocatalytic activity of TiO2 and a change of the photocatalytic kinetic mechanism.
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| 关 键 词： | TiO2 IMPS 二氧化钛晶体 三氯甲烷 化学处理 催化剂 氯化氢 |
Effect of Chemical Treatment on TiO_2 Particles by IMPS |
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| YIN,Feng LIN,Yuan LIN,Rui-Feng LI,Xue-Ping XIAO,Xu-Rui Center for Molecular Science.Effect of Chemical Treatment on TiO2 Particles by IMPS[J].Chinese Journal of Chemistry,2002,20(10):978-982. |
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| Authors: | YIN Feng LIN Yuan LIN Rui-Feng LI Xue-Ping XIAO Xu-Rui Center for Molecular Science |
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| Institution: | YIN,Feng LIN,Yuan LIN,Rui-Feng LI,Xue-Ping XIAO,Xu-Rui Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China |
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| Abstract: | The photodegradation reaction rate of CHCl 3 in TiO 2 particulate suspension was improved significantly by HCl-treatment. The effect of HCl-treatment on the photocatalytic activity of TiO 2 was studied in a PEC cell by using Intensity-Modulated Photocurrent Spectroscopy (IMPS). The magnitude of photocurrent response and the characteristic frequencies of the upper and lower semicircles in the complex plane of IMPS response were analyzed, and the cathodic and anodic reaction processes of photogenerated holes and electrons were discussed. The increases in the cathodic and anodic photocurrent response and in the time constants of both cathodic and anodic reaction processes indicate that HCl-treatment leads to the improvement of the photocatalytic activity of TiO 2 and a change of the photocatalytic kinetic mechanism. |
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| Keywords: | photodegradation TiO 2 particulate suspension photocatalytic activity HCl-treatment IMPS |
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