Synthesis of Vanadium-mesoporous Hollow Spheres

Vanadium-containing mesoporous silica with hollow spherical morphology was successfully synthesized by using CTAB,SDS and P123 as co-template.The influences of vanadium content and reaction conditions on the formation of the materials were also studied.Results indicated that the hollow spheres could not be shaped as molar ratio of V to Si was lower than 0.05 while excess vanadium content led large amount of vanadium oxides existed in the materials.The adequate molar ratio of V to Si was 0.1.The optimal synthesis conditions were reacted at 45℃ for 2 h under pH value of 5.The products with regular structure and morphology exhibited high catalytic activity on the selective oxidation of styrene by hydrogen peroxide.