| TiO2光催化氧化苯酚动力学研究 |
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| 引用本文： | 胡春,王怡中,汤鸿霄.TiO2光催化氧化苯酚动力学研究[J].环境科学,1997,18(4):1-4. |
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| 作者姓名： | 胡春 王怡中 汤鸿霄 |
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| 作者单位： | 中国科学院生态环境研究中心环境水化学国家重点实验室 |
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| 摘 要： | 以中压汞灯为光源，研究了苯酚在ＴｉＯ２水悬浮液中降解动力学，考察了苯酚在起始浓度，气相氧浓度，催化剂投加量（ＴｉＯ２）光强度以及催化剂煅烧温度对苯酚光解速率的影响，揭示了苯酚多相光催化氧化反应的特点，反应过程符合表现一级动力学规律，气相氧的影响为一级，苯酚初始浓度的影响为负一级，在一定光强度下，催化剂的投加量存在一最值值，说明有效光强度，气相氧以及催化剂投加量是光催化氧化反应的关键因素，适当地热处
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| 关 键 词： | 光催化 动力学 苯酚 TiO2 氧化 光解速率 |
| 收稿时间： | 1/8/1997 12:00:00 AM |
Kinetics of Photocatalytic Oxidation of Phenol on TiO2 |
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| Hu Chun,Wang Yizhong and Tang Hongxiao.Kinetics of Photocatalytic Oxidation of Phenol on TiO2[J].Chinese Journal of Environmental Science,1997,18(4):1-4. |
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| Authors: | Hu Chun Wang Yizhong and Tang Hongxiao |
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| Institution: | State Key Laboratory of Environmental Aquatic Chemistry, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;State Key Laboratory of Environmental Aquatic Chemistry, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;State Key Laboratory of Environmental Aquatic Chemistry, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 |
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| Abstract: | The kinetics of the photo degradation of phenol were studied in TiO2 aqueous suspensions under mercury lamp irradiation. The effects of initial concentration(c0)of phenol, oxygen patial pressure(Po2), light intensity(I), the amountof catalyst and calcination temperature of catalyston photodeg radation of phenol have been investigated. The charact eristics of photo catalytic oxidation of phenol were verified, the reaction apparently proceeded according to the first-order kinetics with the apparent rate constant dependencing on c0, Po2, I and TiO2]. Photo catalytic activity can be improved by suitable calcination. The experimental results indicates that the oxygen patial pressure, light intensity and dose of catalysts were important parameters in the deg radation process. A chemical kinetic equation was proposed, which could be in agreement with experimental results. |
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| Keywords: | photocatalytic kinetics phenol TiO2 photocatalytic oxidation |
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