紫外光还原法制备Ag负载的TiO_2纳米管阵列及其光催化性能的研究  

UV-assisted Synthesis of Ag-loaded TiO_2 Nanotube Arrays and their Photocatalytic Performance

作　　者：胡嘉清[1] 羊华睿[1] 罗书昌[1] 冯华杰[1] 李高楠[1] 孙振范[1] 雷炳新[1] 

机构地区：[1]海南师范大学化学与化工学院,海南海口571158

出　　处：《海南师范大学学报（自然科学版）》2013年第1期40-43,共4页Journal of Hainan Normal University（Natural Science）

基　　金：海南省自然科学基金项目(212013);海南师范大学博士科研启动基金资助项目

摘　　要：采用恒电位阳极氧化法,用含氟的二甘醇溶液作为电解液,制备了分离的TiO2纳米管阵列,并结合紫外光还原法,制备Ag纳米颗粒负载的TiO2纳米管阵列.用SEM、XRD和紫外可见吸收光谱对Ag-TiO2纳米管进行表征,并以甲基橙为污染物测定其光催化性能.结果表明:随硝酸银浓度的增大,TiO2纳米管表面被银覆盖的面积更多,紫外吸收强度增强,光催化效率增强.We report the fabrication of self-organized TiO2 nanotube arrays comprised of separated, discrete nanotubes by Ti anodization in fluoride ion containing diethylene glycol （DEG） electrolytes. Ag nanoparticles loaded TiO2 nano- tube arrays （Ag-TiO2） were successfully fabricated by an UV irradiation method. The synthesized samples were charac- terized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and UV-vis absorption spectroscopy. Fur- thermore, photocatalytic activity of the materials was investigated under Xe light irradiation in the process of methyl or- ange decomposition. The results showed that the loaded Ag nanoparticles significantly enhanced photocatalytic degrada- tion rate of TiO2 nanotube arrays which was increasing with the increase of AgNO3 concentration. The highest photocata- lytic degradation rate of the Ag-TiO2 nanotube arrays can reach 98.5%.

关 键 词：二氧化钛 纳米管 银 光催化 

分 类 号：O643-36[理学—物理化学]