硫化亚铜/四针状氧化锌晶须纳米复合材料的制备及其光催化性能(英文)  

Preparation and Photocatalytic Properties of Cu_2S/Tetrapod-Like ZnO Whisker Nanocomposites

作　　者：吴德智[1] 范希梅[1] 代佳[1] 刘花蓉[1] 刘红[1] 张冯章[1] 

机构地区：[1]西南交通大学材料科学与工程学院,材料先进技术教育部重点实验室,四川成都610031

出　　处：《催化学报》2012年第5期802-807,共6页

基　　金：国家高技术研究发展计划(863计划,2009AA03Z427);四川省科学基金(2006z02-006-3)~~

摘　　要：在聚乙烯吡咯烷酮的辅助下,采用多元醇法制备了不同铜/锌摩尔比的硫化亚铜/四针状氧化锌晶须纳米复合材料,并利用X射线衍射、场发射扫描电镜、X射线光电子能谱和紫外-可见漫反射光谱对样品进行了表征.结果表明,在紫外光照射下,样品对甲基橙的光降解效率优于纯ZnO晶须.在铜/锌摩尔比低于4%时,样品的光催化性能随着铜/锌摩尔比增加而增加,但随着铜/锌摩尔比的继续增加,样品的光催化性能下降.此外,还采用周期实验来评价催化剂的稳定性.结果表明,该催化剂具有优异的光催化稳定性.Nanocomposites of tetrapod-like ZnO whisker（T-ZnOw） with loaded Cu2S were synthesized with different Cu/Zn molar ratios with the assistant of poly（vinyl pyrrolidone）（PVP） by the polyol process.The composite samples were characterized by X-ray diffraction,field emission scanning electron microscopy,X-ray photoelectron spectroscopy,and UV-visible diffuse reflectance spectroscopy.The photocatalytic activities for the Cu2S/T-ZnOw nanocomposites increased with Cu/Zn molar ratio up to 4%,and then decreased with further increase of the Cu/Zn molar ratio up to 10%.The Cu2S/T-ZnOw nanocomposites exhibited higher activity than T-ZnOw for the photocatalytic degradation of methyl orange.Recycling experiments were also performed.The photocatalytic activity of the photocatalyst showed no decrease after three cycles,which demonstrated that the Cu2S/T-ZnOw photocatalyst had excellent stability.

关 键 词：氧化锌 硫化亚铜 多元醇法 光催化性能 甲基橙 

分 类 号：O643.36[理学—物理化学]