Ag、N共掺杂TiO2漂浮型催化剂的光催化性能  

PREPARATION AND ACTIVITY EVALUATION OF EXPANDED PERLITE SUPPORTED Ag-N CO-DOPED TiO2 PHOTOCATALYST

作　　者：姜雅[1] 周宇澄 薛红波[1] 尹微琴[1] 侯建华[1,2] 王圣森 封克[1,2] 王小治 JIANG Ya;ZHOU Yu-cheng;XUE Hong-bo;YIN Wei-qin;HOU Jian-hua;WANG Sheng-sen;FENG Ke;WANG Xiao-zhi(College of Environmental Science and Engineering,Yangzhou University,Yangzhou 225127,China;Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing 210095,China;Institutes of Agricultural Science and Technology Development,Yangzhou University,Yangzhou 225127,China)

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]江苏省有机固体废弃物资源化协同创新中心,南京210095 [3]扬州大学农业科技发展研究院,江苏扬州225127

出　　处：《环境工程》2019年第7期114-118,共5页Environmental Engineering

基　　金：江苏省社会发展项目(BE2015661);江苏省现代农业项目(BE2018328);江苏省六大人才高峰项目(2018-TD-JNHB-012);江苏省青蓝工程项目

摘　　要：采用溶胶-凝胶法,制备出银氮共掺杂TiO2负载膨胀珍珠岩的催化剂,通过电子显微镜扫描(SEM)、比表面积及孔径分析(BET)和X射线衍射(XRD)对其结构进行表征,并以罗丹明B溶液为目标降解物,研究所制备催化剂的光催化性能。结果表明:复合材料成功负载了Ag和N元素,且掺杂增强了TiO2对可见光的响应能力;复合材料存在少量的微孔和大孔,同时存在大量的介孔;掺杂氮后材料的光催化活性大幅度提高,继续掺杂Ag后光催化活性进一步提高,当n(Ag)∶n(Ti)=0.50%时光催化性能最佳,4h内处理罗丹明B降解率可达99.3%,材料的光催化反应符合一级反应动力学方程,表明其在环境净化实际应用中的巨大潜力。In this paper,a photocatalyst was prepared,co-doped with Ag,N and TiO 2,loaded on expanded perlite by sol-gel method.The as-synthesized materials were characterized by scanning electron microscopy(SEM),Brunauer-Emmett-Teller(BET)and X-ray diffraction(XRD)for their structures.The photocatalytic properties of the as-synthesized materials were studied with RhB as the target degrading substance.The results confirmed that both Ag and N were present in the nanocomposites.The batch catalytic experiment revealed that Ag and N increased the photolytic capacity of TiO 2 under visible light exposure.There were a small number of micropores and macropores in the composites,and a large amount of mesoporous materials.After doping nitrogen,the photocatalytic activity of the materials increased greatly,and the photocatalytic activity increased further with the doping of silver.The optimized catalytic performance was achieved with the mole ratio of silver to titanium at 0.50%,then the degradation rate of Rhb could reach 99.3% after 4 hours reaction.The RhB degradation course followed the first order kinetic model.The test result revealed its great potential for environmental purification in practical application.

关 键 词：溶胶-凝胶法 银氮共掺杂 TIO2 光催化剂 

分 类 号：O643.36[理学—物理化学]