Abstract: In order to improve the photocatalytic activity of BiVO4， BiVO4/SBA-15 photocatalyst was prepared by impregnation method of BiVO4 loaded on SBA-15 mesoporous molecular sieve. The samples were characterized and analyzed by XRD，N2 adsorption-desorption and FT-TR techniques. Under the irradiation of 400 W metal halide lamps, the oxidation of styrene was conducted with BiVO4/ SBA-15 and BiVO4 as catalyst to investigate the influence of reaction conditions on the oxidation performance. The results showed that the load of BiVO4 did not destroy the mesoporous structure of SBA-15 and it uniformly dispersed on the surface and that BiVO4/SBA-15 photocatalytic activity was significantly improved compared with BiVO4. The conversion of styrene and the selectivity of benzaldehyde reached 90.31% and 70.65%, respectively when Styrene:Acetone:Hydrogen peroxide (molar ratio)= 1: 2: 3.5, reaction temperature 70℃ and reaction time 2.5 h.

Key words: BiVO4/SBA-15, photocatalysis, oxidation, styrene, performance