Ag@ AgCl等离子体负载TiO_2光催化剂的制备及其对氯霉素的降解研究  

Preparation of Ag@ AgCl Supported TiO_2 Plasma Photocatalysts and Photocatalytic Degradation of Chloramphenicol

作　　者：钮金芬[1] 姚秉华[1] 魏佳[1] 余晓皎[1] 

机构地区：[1]西安理工大学理学院,陕西西安710048

出　　处：《西安理工大学学报》2011年第4期451-455,共5页Journal of Xi'an University of Technology

基　　金：陕西省科技厅社发攻关基金资助项目(2011K17-03-02);高等学校博士点学科专项科研基金资助项目(20096118110008);西安市科技创新支撑计划基金资助项目(CXY09025(1));陕西省教育厅基金资助项目(09JK674);西安理工大学优秀博士学位论文研究基金资助项目(108-211005);西安理工大学青年科学研究计划基金资助项目(108-211011)

摘　　要：采用蒸汽热法制备锐钛矿相TiO2,利用沉积-沉淀法和光化学反应将AgCl分散到TiO2上,通过光化学反应将Ag+还原,获得Ag@AgCl等离子体负载TiO2光催化剂。通过XRD、TEM、UV-vis漫反射吸收光谱(DRS)对产物进行表征,研究光催化剂对氯霉素的光催化降解性能。结果表明,Ag@AgCl等离子体负载TiO2光催化剂对氯霉素具有良好的光催化活性,其在高压汞灯下30 min的降解率可达95%,在Xe灯下180 min的降解率可达60%。The anatase TiO2 was prepared by steam heating method.AgCl nanoparticles were then loaded onto the TiO2 via deposition-precipitation,and some of the Ag＋ particles were reduced to Ag particles by photo reduction method.Ag@AgCl supported TiO2 plasma photocatalysts can be obtained.The products are characterized by XRD,TEM and DRS spectroscopy.The photocatalytic activity is evaluated using chloramphenicol（CAP） degradation under UV and visible light irradiation.The results indicate that the Ag@AgCl supported TiO2 plasma photocatalysts significantly improve the photocatalytic degradation of CAP performance.The degradation rate is about 95% after high-pressure mercury lamp irradiation of CAP solution of 50 mg/L for 30 min,and 60% after Xe lamp irradiation of CAP solution of 50 mg/L for 180 min.

关 键 词：光催化 TIO2 AG 等离子体 氯霉素 降解 

分 类 号：O646[理学—物理化学]