二元阴阳离子表面活性剂法合成介孔氧化硅囊泡

来源 :高等学校化学学报 | 被引量 : 0次 | 上传用户:xszr1112
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以十二烷基磺酸钠(SDS)和十六烷基三甲基溴化铵(CTAB)为表面活性剂,在SDS与CTAB的摩尔比为1.0~2.3时,以正硅酸乙酯(TEOS)为硅源,在氨水-水体系中于68℃下合成介孔氧化硅囊泡.通过透射电子显微镜(TEM)、X射线衍射仪(XRD)、热重分析仪(TGA)和氮气吸附-脱附实验仪对合成的产物进行表征.结果表明,合成的产物为介孔氧化硅囊泡聚集体,孔径约为4 nm,样品的Brunauer-Emmett-Teller(BET)比表面积为826 m^2/g.对介孔氧化硅囊泡的形成机理做了初步探讨.
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