改性纳米二氧化钛可见光催化降解水体中五氯酚  

Photocatalytic degradation of pentachlorophenol by Fe doped TiO_2 nanoparticles synergized with ultrasound in visible light

作　　者：李乐[1,2] 丁德馨[2] 唐双阳[3] 胡南[2] 付平坤 赵维超[1] 辛馨[2] 谭琰[1] 

机构地区：[1]南华大学公共卫生学院,湖南衡阳421001 [2]南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳421001 [3]南华大学医学院,湖南衡阳421001

出　　处：《应用化工》2013年第12期2206-2209,共4页Applied Chemical Industry

基　　金：湖南省教育厅项目资助(11C1078);湖南省科技厅项目资助(2012SK3154)

摘　　要：采用共沉淀-浸渍法制备掺Fe的改性纳米TiO2光催化剂,以五氯酚(PCP)的光催化降解反应为模型,研究了不同光催化剂、不同光催化降解体系对水体中PCP降解效率。结果表明,适量Fe元素掺杂改性TiO2后,光催化剂为锐钛矿型,粒径变小,形貌规则,分散性能良好,且掺杂后可降低纳米TiO2光生电子-空穴对的复合几率,提升光催化剂对可见光子利用率。0.008%Fe-TiO2具有最佳的PCP可见光催化降解效率,降解率达90.3%,超声对光催化氧化降解水体PCP有良好协同作用。该降解反应体系简单、可直接利用可见光,成本低、便于推广。Fe Doped TiO2 nanoparticles were successfully prepared by coprecipitation precipitation meth- od. Using the reaction of photocatalytic degradation of pentachlorophenol （PCP） as a model, its photocata- lytic degradation efficiency utilizing visible light effectively was investigated with different photocatalytic and degradation system. Results indicate that the crystal form of photochemical catalyst is still anatase form,particle diameter smaller, specific surface area larger, and visible light enhanced as the proper Fe depositing on the TiO2 could reduce the recombination probability of photoinduced electron and hole ab- sorption after proper Fe depositing on the TiO2. 0. 008% Fe-TiO2 has the best efficiency of visible light catalytic degradation on PCP with the synergistic effect of ultrasound, and the degradation rate could reach 90.3%. The degradation reaction system is simple and low cost due to directly utilizing visible light ,easy to promote in practical treatment.

关 键 词：FE掺杂 TIO2 改性 光催化 五氯酚 

分 类 号：TQ034[化学工程]