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Acta Physico-Chimica Sinica  2001, Vol. 17 Issue (01): 28-31    DOI: 10.3866/PKU.WHXB20010106
Article     
Effect of Sulfation on Structure and Photocatalytic Performance of TiO2
Su Wen-Yue;Fu Xian-Zhi;Wei Ke-Mei
Research Institute of Photocatalysis,Fuzhou University,Fuzhou 350002
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Abstract  TiO2 and /TiO2 photocatalysts were prepared by solgel method and characterized by Xray diffraction (XRD),BET N2 sorption analysis, IR spectroscopy and UVVis Diffuse Reflectance Spectroscopy (DRS).Photocatalytic degradation of CH3Br in air stream was studied over TiO2 and /TiO2 catalysts under various reaction conditions.The results indicated that the structural and photocatalytic properties of TiO2 were greatly improved by sulfation.The sulfated TiO2 (/TiO2) showed excellent reaction activity and stability for CH3Br photocatalytic decomposition even under the moist reaction conditions.It was found that both B acid sites and L acid sites exist on the /TiO2 catalyst,forming cooperative centers with superacidic characteristics.When compared to unmodified TiO2,the /TiO2 catalyst exhibited higher anatase content,smaller crystal size,higher specific surface area,centralized pore size distribution,and the blueshifted band edge of Uvvis adsorption spectra.

Key wordsTitania      Sulfation      Photocatalysis      Bromomethane     
Received: 04 April 2000      Published: 15 January 2001
Corresponding Authors: Fu Xian-Zhi     E-mail: xzfu@fzu.edu.cn
Cite this article:

Su Wen-Yue;Fu Xian-Zhi;Wei Ke-Mei. Effect of Sulfation on Structure and Photocatalytic Performance of TiO2. Acta Physico-Chimica Sinica, 2001, 17(01): 28-31.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20010106     OR     http://www.whxb.pku.edu.cn/Y2001/V17/I01/28

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