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Acta Phys. -Chim. Sin.  2008, Vol. 24 Issue (11): 2071-2076    DOI: 10.3866/PKU.WHXB20081123
Article     
Photocatalytic Properties of Composite of SiO2 and Pt-Cd0.53Zn0.47S Solid Solutions
HU Yuan-Fang; LI Yue-Xiang; PENG Shao-Qin; LV Gong-Xuan; LI Shu-Ben
Department of Chemistry, Nanchang University, Nanchang 330031, P. R. China; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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Abstract  Cd0.53Zn0.47S was prepared by a coprecipitation method. Pt was loaded onto Cd0.53Zn0.47S by photodeposition method. SiO2 was deposited onto Cd0.53Zn0.47S by hydrolysis of the tetraethylorthosilicate (TEOS), and the effect of the hydrolysis pH on the activity of the catalysts was studied. The samples were characterized by X-ray diffraction (XRD), BET surface area, photoluminescence (PL), UV-Vis diffusive reflectance spectroscopy (UV-Vis DRS), and scanning electron microscope (SEM) techniques. The composite SiO2 prevented effectively photocorrosion and coalescence of Pt-Cd0.53Zn0.47S nanoparticles during the photocatalytic reaction, and improved the charge separation of photogenerated electrons and holes. Therefore, the stability and the activity of Pt-Cd0.53Zn0.47S for photocatalytic hydrogen generation
under visible light irradiation were improved greatly.

Key words： Photocatalyst      SiO2/Pt-Cd0.53Zn0.47S      Hydrogen production      Solid solution     
Received: 04 May 2008      Published: 26 September 2008
MSC2000:  O643  
  O644  
Corresponding Authors: LI Yue-Xiang     E-mail: liyx@ncu.edu.cn
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Cite this article:

HU Yuan-Fang; LI Yue-Xiang; PENG Shao-Qin; LV Gong-Xuan; LI Shu-Ben. Photocatalytic Properties of Composite of SiO2 and Pt-Cd0.53Zn0.47S Solid Solutions. Acta Phys. -Chim. Sin., 2008, 24(11): 2071-2076.

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http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20081123     OR     http://www.whxb.pku.edu.cn/Y2008/V24/I11/2071

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