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Photochemical preparation of CdS hollow microspheres at room temperature and their use in visible-light photocatalysis |
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| Authors: | Yuying Huang Fengqiang Sun Tianxing Wu Zhong Huang Zihe Zhang |
| Institution: | a School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China b Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation in GuangDong Universities, Guangzhou 510006, PR China c Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (Ministry of Education), South China Normal University, Guangzhou 510006, PR China d School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, PR China |
| Abstract: | CdS hollow microspheres have been successfully prepared by a photochemical preparation technology at room temperature, using polystyrene latex particles as templates, CdSO4 as cadmium source and Na2S2O3 as both sulphur source and photo-initiator. The process involved the deposition of CdS nanoparticles on the surface of polystyrene latex particles under the irradiation of an 8 W UV lamp and the subsequent removal of the latex particles by dispersing in dichloromethane. Photochemical reactions at the sphere/solution interface should be responsible for the formation of hollow spheres. The as-prepared products were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. Such hollow spheres could be used in photocatalysis and showed high photocatalytic activities in photodegradation of methyl blue (MB) in the presence of H2O2. The method is green, simple, universal and can be extended to prepare other sulphide and oxide hollow spheres. |
| Keywords: | Photochemical preparation CdS hollow microspheres Photocatalysis |
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