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OALib Journal期刊
ISSN: 2333-9721
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单分散纳米介孔二氧化硅的制备
Keywords: 无机非金属材料,纳米介孔二氧化硅mcm-41,单
Abstract:
？在温和碱性条件下,以十六烷基三甲基溴化铵为模板剂,正硅酸乙酯为硅源,三嵌段共聚物f127为助剂,制备出粒径为60-80nm的单分散纳米介孔二氧化硅mcm--41.研究了f127的用量对介孔结构和纳米粒子分散性的影响.结果表明,适量的非离子表面活性剂f127具有助模板剂的作用,可以有效地提高纳米介孔粉体的有序性;过量的f127阻碍六方介孔相的形成,降低样品的有序性.f127与十六烷基三甲基溴化铵的摩尔比在0.04-0.08范围内,可以得到有序性好、孔径均一和孔隙率大的单分散纳米介孔二氧化硅mcm--41.
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