硅源对纯硅MCM-41介孔分子筛结构性能的影响  

Effect of Silica Source on the Structure of Pure Silica MCM-41 Mesoporous Molecular Sieves

作　　者：刘雷[1] 张高勇[1] 董晋湘[2] 冯尚华[1] 

机构地区：[1]中国日用化学工业研究院表面活性剂国家工程研究中心,山西太原030001 [2]太原理工大学精细化工研究所,山西太原030024

出　　处：《精细化工》2004年第2期95-97,118,共4页Fine Chemicals

基　　金：国家自然科学基金重点资助项目(20233010)

摘　　要：分别采用正硅酸乙酯(TEOS)、气相法白炭黑、硅溶胶为硅源,十六烷基三乙基溴化铵(CTEAB)为结构导向剂,在100℃用水热晶化法在碱性(NaOH)介质中反应5d,合成出MCM-41介孔分子筛样品。通过XRD、N2吸附-脱附测试手段对不同硅源合成的样品进行了对比表征分析,实验结果表明,相对于TEOS作为硅源,气相法白炭黑和硅溶胶制得的MCM-41具有较大的孔径(>4nm)和孔容(>1cm3/g)以及高的比表面积(1000m2/g),在制备大孔径的介孔MCM-41时,气相法白炭黑和硅溶胶是两种比较好的硅源。Using tetraethyl orthosilicate (TEOS),silicasol and fumed-silica as silica sources,and cetyltriethylammonium bromide as templating agent,the mesoporous molecular sieves MCM-41 were synthesized by hydrothermal method in basic medium at 100 ℃ for 5 days.The synthesized samples were characterized by XRD and N_2 adsorption-desorption.Experimental results show that,compared with samples synthesized by tetraethyl orthosilicate,the samples synthesized with silicasol and fumed-silica have larger pore diameter (>4 nm) and pore volume (>1 cm^3/g) and higher specific surface area (1000 m^2/g).Thus,for preparing large pore mesoporous MCM-41,silicasol and fumed-silica may be the preferred silica sources.

关 键 词：介孔分子筛 MCM-41 水热合成 硅源 模板剂 

分 类 号：O613.7[理学—无机化学]