Sonochemical Synthesis of Core/Shell Structured CdS/TiO_2 Nanocrystals Composites  

作　　者：王智宇 

机构地区：[1]State Key Laboratory of Silicon Materials,Department of Materials Science and Engineering, Zhejiang University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2009年第5期698-701,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (Nos.50532030 and 50625206);the Zhejiang Provincial Natural ScienceFoundation of China (No. Z4080021)

摘　　要：A simple sonochemical route for the surface coating of titanium dioxide on cadmium sulfide nanocrystal was reported. After 2 h ultrasonic irradiation treatment, the mixture of CdS nanocrystals and tetrabutyl titanate in an aqueous medium yielded CdS/TiO2 nanocrystals composites with core/shell structure. The thickness of TiO2 layer with smooth interface could be easily controlled via changing the concentration of the precursors and the time of irradiation. The core/shell nanocrysrals were characterized by X-ray diffraction, transmission electron microscope and UV-vis spectrometry techniques. The prepared semiconductor composites with particular band structure present appealing properties especially in photochemical activity.A simple sonochemical route for the surface coating of titanium dioxide on cadmium sulfide nanocrystal was reported. After 2 h ultrasonic irradiation treatment, the mixture of CdS nanocrystals and tetrabutyl titanate in an aqueous medium yielded CdS/TiO2 nanocrystals composites with core/shell structure. The thickness of TiO2 layer with smooth interface could be easily controlled via changing the concentration of the precursors and the time of irradiation. The core/shell nanocrysrals were characterized by X-ray diffraction, transmission electron microscope and UV-vis spectrometry techniques. The prepared semiconductor composites with particular band structure present appealing properties especially in photochemical activity.

关 键 词：core/shell CDS/TIO2 SONOCHEMICAL photochemical activity 

分 类 号：TB383.1[一般工业技术—材料科学与工程]