【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。更多还原

【Abstract】 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 N₂ 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 cm³/g） and higher specific surface area （1000 m²/g）.Thus,for preparing large pore mesoporous MCM-41,silicasol and fumed-silica may be the preferred silica sources.更多还原