| TiO_2光催化降解氯酚类有机污染物的反应机理 |
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| 引用本文： | 王兆慧,马万红,陈春城,籍宏伟,赵进才.TiO_2光催化降解氯酚类有机污染物的反应机理[J].中国科学:化学,2011(8):1286-1297. |
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| 作者姓名： | 王兆慧 马万红 陈春城 籍宏伟 赵进才 |
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| 作者单位： | 北京分子科学国家实验室中国科学院化学研究所;东华大学环境科学与工程学院; |
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| 基金项目： | 国家重点基础研究发展计划(973计划,2010CB933503,2007CB613306); 国家自然科学基金(20920102034,21077110,20907056); 东华大学校青年基金项目(113-10-0044049)资助 |
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| 摘 要： | 氯酚类有机污染物具有较高毒性、难生物降解和强生物累积性等特点,成为较受关注的一类优先控制污染物.我们总结了氯酚TiO2光催化降解机理研究方面的最新进展,阐述了直接光解、·OH氧化、1O2氧化、O(3P)氧化、O2·氧化、导带电子还原和表面络合物电子转移等氯酚光降解途径与机理.重点讨论了O2在氯酚吸附、光催化降解乃至矿化过程中的重要作用.
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| 关 键 词： | 氯酚 光催化 机理 活性氧物种 自由基反应 |
Photodegradation mechanism of chlorophenols pollutants by TiO_2 photocatalysis |
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| WANG ZhaoHui ,MA WanHong ,CHEN ChunCheng ,JI HongWei & ZHAO JinCai Beijing National Laboratory for Molecular Sciences.Photodegradation mechanism of chlorophenols pollutants by TiO_2 photocatalysis[J].Scientia Sinica Chimica,2011(8):1286-1297. |
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| Authors: | WANG ZhaoHui MA WanHong CHEN ChunCheng JI HongWei & ZHAO JinCai Beijing National Laboratory for Molecular Sciences |
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| Institution: | WANG ZhaoHui 1,2,MA WanHong 1,CHEN ChunCheng 1,JI HongWei 1 & ZHAO JinCai 1 1 Beijing National Laboratory for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China 2 College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China |
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| Abstract: | Chlorophenols constitute a particular group of priority toxic pollutants listed by many countries,due to their high toxicity,resistance to biodegradation and ability to bioaccumulate in organisms.This paper reviews the current advance in mechanistic aspects of photocatalytic degradation of chlorophenols.The photodegradation mechanism of direct photolysis,· OH oxidation,1 O 2 oxidation,O（3 P） oxidation,O 2 ·-oxidation,photoreductive dechlorination and charge-transfer of surface complex are introduced respectively.In particular,the roles of molecular oxygen in chlorophenols adsorption,photodegradation and even mineralization are discussed. |
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| Keywords: | chlorophenols photocatalysis mechanism reactive oxygen species free radical reaction |
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