聚乙烯吡咯烷酮修饰的CdS纳米晶:多元醇合成、表征和可见光活性(英文)  

Poly(N-vinyl-2-pyrrolidone)-capped CdS Nanocrystals: Polyol Synthesis, Characterization and Visible-light Photocatalysis

作　　者：陈崇启 詹瑛瑛[1] 郑远辉[1] 林性贻[1] 郑起[1] 

机构地区：[1]福州大学化肥催化剂国家工程研究中心,福州350002

出　　处：《无机化学学报》2008年第4期605-609,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No20771025);福建省重大专项项目(No2005H201-2)资助

摘　　要：采用溶剂热法合成了具有不同晶粒尺寸的聚乙烯吡咯烷酮(PVP)修饰的CdS纳米晶,并运用XRD,N2物理吸附,TEM,IR,UV-Vis等手段进行表征。结果表明,所制得的样品均为聚乙烯吡咯烷酮(PVP)修饰的CdS纳米晶;添加四甲基氢氧化铵(TMAH)有利于获得晶粒尺寸较小的CdS纳米晶;受纳米晶粒尺寸的影响,CdS纳米晶的吸收边发生蓝移且可见光催化活性明显提高。Poly （N-vinyl-2-pyrrolidone）-capped CdS nanocrystals with different crystalline sizes were synthesized through a simple solvothermal method. The structures of the as-synthesized samples were characterized by XRD, N2 physisorption, TEM, IR spectroscopy, and UV-Vis spectroscopy. The results show that the as-synthesized samples are poly（N-vinyl-2-pyrrolidone）-capped CdS nanohybrid materials; the grain size of CdS nanocrystals is smaller when tetramethylammonium hydroxide（TMAH） is introduced in the reaction system. In addition, it is also found that the bandgap of CdS nanocrystals is blue shifted and the visible-light photocatalytic activity of the sample synthesized in the presence of TMAH increases due to the size effect.

关 键 词：溶剂热 PVP修饰的CdS纳米晶 半导体 可见光催化 

分 类 号：O614.242[理学—无机化学]