浸渍法制备Ag_2O-TiO_2纳米纤维及其光催化活性  

Preparation and Their Photocatalytic Activity of Ag_2O-TiO_2 Nanofibers by Immersion Method

作　　者：游洋[1,2] 张世英[1,2] 万隆[2] 许第发[1] 

机构地区：[1]长沙学院,湖南长沙410003 [2]湖南大学,湖南长沙410082

出　　处：《稀有金属材料与工程》2010年第S2期332-335,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50872014);长沙学院科研基金(SF030505)

摘　　要：采用浸渍法制备直径约20nm,长度达到微米级,且形态分布均匀的Ag2O-TiO2纳米纤维。以TEM、XRD、DRS及XPS手段对样品晶型结构、微观形貌以及化学组成进行表征,探讨掺杂对TiO2纤维结构和性质的影响。结果表明:未掺杂纤维表面平滑,浸渍法制备的Ag2O-TiO2纤维表面有明显的球状颗粒存在,颗粒直径为2～5nm,分布均匀,且其XRD谱出现Ag2O的衍射峰。与未掺杂样品相比,掺杂纤维的DRS谱线发生蓝移,光催化降解亚甲基蓝实验表明Ag2O-TiO2纤维光催化活性较高。Ag2O-TiO2 nanofiber was prepared by immersion method, whose length was about 1000 nm and whose diameter was about 20 nm. It was observed that the Ag2O-TiO2 nanofiber distributed uniformly. The Ag2O-TiO2 nanofibers were characterized by means of transmission electron microscope (TEM), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS) and diffuse reflection spectra (DRS). The XRD patterns display the diffraction peak of Ag2O. Obviously, there were some small particles absorbed on the surface of nanofiber and the diameter of the particle was 2-5 nm. In the pattern of DRS, the absorb-strip of the adulterated sample generated blue-shift compared with that of the non-adulteration nanofiber, which indicate that the photocatalytic activity of Ag2O-TiO2 nanofiber is higher than that of TiO2 nanofiber.

关 键 词：Ag2O-TiO2 浸渍法 纳米纤维 光催化 

分 类 号：O643.36[理学—物理化学]