Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (05): 1330-1336.doi: 10.3866/PKU.WHXB20100520

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Synthesis and Photocatalytic Activity of Highly Dispersed TiO2/SBA-15

ZHANG Shu-Cui, JIANG Dong, TANG Tao, LI Jun-Hua, XU Yao   

  1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China; Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2009-12-10 Revised:2010-01-13 Published:2010-04-29
  • Contact: JIANG Dong, XU Yao E-mail:xuyao@sxicc.ac.cn; jdred@sxicc.ac.cn

Abstract:

Highly dispersed TiO2/SBA-15 photocatalysts were successfully synthesized by solvothermal treatment using titanium n-butoxide (TB) and carboxylate-modified SBA-15 (COOH/SBA-15) as raw materials. The good dispersive carboxyl groups of COOH/SBA-15 coordinated with TB molecules to anchor them. After solvothermal treatment, the TB molecules were transformed into TiO2 nanoparticles and finally formed the TiO2/SBA-15 products. The products were calcined to improve the crystallization of TiO2 and to remove the organic compounds. As-obtained TiO2/SBA-15 photocatalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption, Fourier transform infrared (FI-IR) spectroscopy, and transmission electron microscopy (TEM). Analytical results showed that the as-obtained TiO2/SBA-15 photocatalysts possessed a better mesoporous structure and a larger specific surface area. The highly crystalline anatase TiO2 nanocrystals dispersed well on the surface of SBA-15. RhodamineB (RhB), as a photodegradation target, was used to evaluate photocatalytic performance under UV light irradiation. The as-obtained TiO2/SBA-15 photocatalysts exhibited much better photocatalytic activity compared with the photocatalysts prepared by a post-synthesis impregnation method.

Key words: Photocatalysis, Carboxylate-modified, TiO2, SBA-15, Solvothermal

MSC2000: 

  • O643