We have developed a simple synthetic method to prepare the hybrid microspheres of CdS nanoparticles on the surface of silica microspheres modified by（3-mercaptopropyl）trimethoxysilane（MPS）. The —SH groups of MPS can bind with the Cd 2+ ions on the surface of SiO 2 . When thioacetamide releases H 2 S, the nanosized CdS particles（1—6 nm） will successfully be generated on the silica surface under the experimental conditions. The size of the CdS na-noparticles was found to be related to the concentration of Cd2+ feed and the size of silica spheres, the higher the concentration of Cd2+ and the larger of silica microspheres, the bigger the size of CdS nanoparticles. Techniques including UV, PL, TEM and XPS were used to characterize the CdS-SiO2 hybrid microspheres.
HAN Kun XIANG Zheng WANG Zheng WANG Chun-lei LI Min-jie ZHANG Jun-hu YANG Bai
