Mesoporous silica molecular sieve Ce-SO
4
2--SBA-15 was synthesized via incipient-wetness impregnation. Characterization was done by X-ray diffraction (XRD), IR spectroscopic, nitrogen adsorption techniques . The results show that cerium has been incorporated into SBA-15 molecular sieve．The prepared materials keep the highly ordered mesoporous two-dimensional hexagonal structure and the mesoporous channel structure．The acid strength (pH=1.8 ) on catalyst surface was determined by mean of Hammett indication method,and attribute to solid acid.The catalyst prepared by impregnating SBA-15 in solution of 0.1 mol/L ceric sulfate and being calcined at 300 ℃ for 3 h showed best catalytic activity in synthesis of n-butyl acetate. The yield of n-butyl acetate was up 95.7% under the optimum conditions.
2008, 21 (1):
46-50.
