【摘要】 以十六烷基三甲基溴化铵为模板剂、廉价的工业级硅酸钠为硅源,采用水热合成法制备了掺杂V的中孔分子筛V-MCM-41,考察其制备条件对苯乙烯催化氧化反应的影响。实验结果表明最佳制备条件为:采用先加钒源后加硅源,n(Si)∶n(CTAB)∶n(V)=1∶0.2∶0.08的配比,在pH=9.5条件下晶化48 h,制备的V-MCM-41对苯乙烯具有较好的催化活性,BET比表面积为1003 m2/g,平均孔径为3.944 nm,经800℃热处理12 h,其比表面积和孔径保留率分别为81.6%和58.6%,XRD谱图进一步证实此中孔分子筛具有较好的热稳定性。更多还原

【Abstract】 By hydrothermal method,using hexadecyltrimethylammonium bromide as template agent,industrial Na₂O·（3.3～3.5） SiO₂ as cheap silica source,adding V⁵⁺ in the synthesis process,the mesoporous molecular sieves containing vanadium were synthesized.The oxidation of styrene was studied as a model reaction and proper parameters were selected: n（Si）∶n（CTAB）∶n（V）=1∶0.2∶ 0.08,pH=9.5,crystallizing time 48 h.Mesoporous molecular sieve V-MCM-41 with surface area（BET） = 1003 m²/g and average pore size of 3.944 nm was synthesized.After thermaltreating at 800 ℃ for 12 h,the surface area（BET） and pore diameter remain 81.6% and 58.6%.The good thermal stability of the mesoporous molecular sieves V-MCM-41were proved by BET data and XRD spectra.更多还原