V-MCM-41杂原子中孔分子筛的合成及苯乙烯催化氧化

Synthesis of Mesoporous Molecular Sieves V-MCM-41 and Their Performances for Styrene Catalytic Oxidation

作者：许俊强(四川大学化学工程学院，四川成都 610065)；储伟(四川大学化学工程学院，四川成都 610065)；黄利宏(四川大学化学工程学院，四川成都 610065)

Author：(School of Chem. Eng., Sichuan Univ., Chengdu 610065, China)；(School of Chem. Eng., Sichuan Univ., Chengdu 610065, China)；(School of Chem. Eng., Sichuan Univ., Chengdu 610065, China)

收稿日期：2005-07-08 年卷（期）页码：2006,38(2):60-64

期刊名称：工程科学与技术

Journal Name：Advanced Engineering Sciences

关键字：V-MCM-41杂原子中孔分子筛；水热合成；催化氧化；苯乙烯

Key words：heteroatom V-MCM-41; hydrothermal synthesis; catalytic oxidation; styrene

基金项目：四川大学科技创新基金资助项目(2005CF07）

中文摘要

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。

英文摘要

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 thermal-treating 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.

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论文摘要

V-MCM-41杂原子中孔分子筛的合成及苯乙烯催化氧化

Synthesis of Mesoporous Molecular Sieves V-MCM-41 and Their Performances for Styrene Catalytic Oxidation