YIN Bo, LIU Xiao-jun*, WANG Ji-tong, QIAO Wen-ming, LING Li-cheng
(State key Laboratory of Chemical Engineering, East china University of Science and Technology, Shanghai 200237, China)
Abstract: The TiO2/PSAC composites were prepared by sol-gel method and impregnation-calcination method, respectively, with tetrabuty tinanate as titanium source and pitch-based spherical activated carbon (PSAC) as carrier. The composite catalysts were characterized by XRD, SEM, EDS, TGA. The photocatalytic degradation activity and cyclic reaction of samples were studied using methyl orange as probe. The results indicated that the samples synthesized from the two methods exhibits microporous structure and shows high photocatalytic activity. The composite prepared by sol-gel method sintered at 450℃ in a N2 atmosphere has an anatase crystal model coating on the surface of carrier, and its photocatalytic activities for MO can reach 96.7% after cycle reaction, 84.0% after third cycle, while the activities of composite sample prepared by impregnation-calcination method can just reach 90.1% and 69.1%, respectively, superior to pure PSAC just about 55.0%.
Key words: PSAC; titanium dioxide; composites; photocatalytic degradation
E-mail: liuxj@ecust.edu.cn
Journal of Molecular Catalysis, Vol. 25, Issue 3, 2011, 254~261
