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Acta Physico-Chimica Sinica  2010, Vol. 26 Issue (01): 79-86    DOI: 10.3866/PKU.WHXB20100131
CATALYSIS AND SURFACE STRUCTURE     
Influence of Sol-Gel and Dip-Hydrothermal Preparation Methods on Structure and Performance of TiO2/AC Photocatalysts
XU Xin, WANG Xiao-Jing, HU Zhong-Hua, LIU Ya-Fei, WANG Chen-Chen, ZHAO Guo-Hua
Department of Chemistry, Tongji University, Shanghai 200092, P. R. China; School of Sciences, Hebei University of Science and Technology, Shijiazhuang 500018, P. R. China
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Abstract  

TiO2 catalysts deposited on activated carbon (TiO2/AC) were prepared by sol-gel and dip-hydrothermal methods to investigate the effect of preparation methods on the structure and catalytic performance of TiO2/AC catalysts. The samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, and nitrogen adsorption. Results show that the TiO2 produced by the sol-gel method consists of irregular fragments coated onto the carbon surface and that the dip-hydrothermal method leads to nanorods being deposited onto the AC surface. The mesoporous and microporous specific surface areas of the TiO2/AC samples prepared by the dip-hydrothermal method were larger than those of the sol-gel samples, and the diameters of the TiO2 particles prepared by the former method were smaller. The performance of the TiO2/AC composite photocatalysts was evaluated by the degradation of methyl orange (MO). We found that 600 ℃ was the optimal temperature for the calcination of TiO2. Furthermore, the photocatalytic activities of TiO2/AC samples prepared by the dip-hydrothermal method were obviously better than those prepared by the sol-gel method.



Key wordsTiO2      Photocatalysis      Activated carbon support      Sol-gel method      Dip-hydrothermal method     
Received: 27 July 2009      Published: 02 December 2009
MSC2000:  O641  
  O433  
Corresponding Authors: HU Zhong-Hua     E-mail: huzh@tongji.edu.cn
Cite this article:

XU Xin, WANG Xiao-Jing, HU Zhong-Hua, LIU Ya-Fei, WANG Chen-Chen, ZHAO Guo-Hua. Influence of Sol-Gel and Dip-Hydrothermal Preparation Methods on Structure and Performance of TiO2/AC Photocatalysts. Acta Physico-Chimica Sinica, 2010, 26(01): 79-86.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20100131     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2010/V26/I01/79

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