TiO₂负载四羧基苯基卟啉光催化降解有机污染物

TiO 2 负载四羧基苯基卟啉光催化降解有机污染物 Degradation of Organic Pollutants by Photocatalyst 5,10,15, 20-Tetrakis-（4-Carboxylphenyl）Porphyrin Loaded on TiO 2 彭一茱 PENG Yizhu 1 2 first-author 王攀 WANG Pan 1 方艳芬 FANG Yanfen 1 2 汪淑廉 WANG Shulian 1 2 贾漫珂 JIA Manke 1 2 黄应平 HUANG Yingping 1 2 三峡地区地质灾害与生态环境湖北省协同创新中心 三峡地区地质灾害与生态环境湖北省协同创新中心 Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area 三峡大学三峡库区生态环境教育部工程研究中心 三峡大学三峡库区生态环境教育部工程研究中心 Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region,Ministry of Education, China Three Gorges University Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region,Ministry of Education, China Three Gorges University 分别采用水热法和机械搅拌方式制备了TiO2负载四羧基苯基卟啉（TCPP）光催化剂Hydro-TiO2@TCPP和Stir-TiO2@TCPP,运用红外吸收光谱（IR）和紫外可见漫反射吸收光谱（DRS）及X射线光电子能谱（XPS）对其进行了表征.Hydro-TiO2@TCPP和Stir-TiO2@TCPP分别通过共价键和氢键的方式使TCPP有效负载在TiO2上,它们循环降解RhB五次的降解率仍能分别达到92.0%和68.3%.两种负载型催化剂Hydro-TiO2@TCPP和Stir-TiO2@TCPP较TiO2均有更高的可见光催化活性,光照1.5h使RhB完全褪色,Stir-TiO2@TCPP催化光照6h使BA降解92.7%.实验还考察了降解过程中羟基自由基（OH·）和H2O2的变化,发现降解是由于OH·的进攻所致. Two catalysts named Hydro-TiO2 @TCPP and Stir-TiO2 @TCPP were prepared by loading porphyrin（TCPP）on TiO2 using hydrothermal and stirring method,respectively,and characterized by infrared absorption spectroscopy（IR）,ultraviolet-visible diffuse reflectance spectrum（DRS）and X-ray photoelectron spectroscopy（XPS）. For Hydro-TiO2 @TCPP and Stir-TiO2 @TCPP,TCPP was easily loaded on TiO2 by covalent and non-covalent hydrogen band.The stabilities of the two catalysts in the photo-catalytic process were also discussed and the results showed that the degradation rates of RhB were 92.0% and 68.3%,respectively,after 5cycles.The supported catalyst Hydro-TiO2 @TCPP and Stir-TiO2 @TCPP had higher photo-catalytic activity under visible light than that of TiO2. RhB was completely decolorized after 1.5h,and 92.7% BA was degraded by Stir-TiO2 @TCPP after 6h.To propose the degradation mechanism,intermediate reactive oxygen species hydroxyl radical（OH·）and H2 O2 generated during the oxidative process was detected and the results demonstrated that OH·was involved. 卟啉 TiO2 负载 可见光催化降解 porphyrin TiO2 load photo-catalytic degradation 10.14188/j.1671-8836.2014.01.008 X703.1 国家自然科学基金（21177072,21207079,21307073,21377067）;湖北省高校优秀中青年创新团队计划（T200703）;湖北省自然科学基金创新群体项目（2009CDA020）;中国科学院生态环境研究中心开放基金（KF2011-07） 2014-01-01 2021-04-01 1 60