Sonochemical synthesis of core/Shell structured CdS/TiO2 nanocrystals composites |
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Authors: | Zhiyu Wang Zhongping Yu Bo Liu Bo Ye Guodong Qian Xianping Fan |
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Affiliation: | (1) Department of Chemical Engineering, Inha University, 253 Yonghyundong, Namgu, Incheon, 402–751, South Korea;(2) Korea Institute of Materials Science, 531 Changwondaero, Changwon, Gyeongnam, 641–841, South Korea; |
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Abstract: | 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. |
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