三头季铵盐阳离子表面活性剂合成菱形十二面体介孔二氧化硅单晶  

Synthesis of Mesoporous Silica Single Crystal of Rhombic Dodecahedron Using Tri-head Group Quarternary Ammonium Cationic Surfactant

作　　者：沈绍典 蔡华强[2] 朱晓东 凌龙云 罗秋玲[4] 万全云 毛东森 卢冠忠[1,4] 

机构地区：[1]上海应用技术学院化工系工业催化研究所 [2]复旦大学化学系 [3]思百吉中国有限公司帕纳科业务部 [4]结构可控先进功能材料及其制备教育部重点实验室华东理工大学催化研究所 [5]上海应用技术学院化工系工业催化研究所上海200235

出　　处：《化学学报》2009年第10期1093-1097,共5页Acta Chimica Sinica

基　　金：上海市科委(Nos.08ZR1418800;06JC14095);上海市教委(No.08YZ165)资助项目

摘　　要：由于介孔二氧化硅单晶规整的外观形貌和有序的内部孔道结构性能,使其在微激光器件领域具有十分重要的潜在应用.试着用高电荷密度的阳离子三头季铵盐表面活性剂(C18-2-3-1)作模板剂,用正硅酸四乙酯作无机前驱体,在硫酸介质中通过调变有机-无机物种之间的协同组装作用,成功地合成了具有简单立方相Pm3n结构的介孔二氧化硅单晶.扫描电子显微镜(SEM)观察到这种介孔二氧化硅单晶具有菱形十二面体形貌,X射线衍射(XRD)和透射电子显微镜(TEM)测试结果证实这种介孔单晶属于简单立方Pm3n对称结构.氮气吸附数据测得这种单晶具有较大的BET比表面积(550cm2/g),较大的孔体积(BJH0.20cm3/g)和孔径(BJH2.4nm).Mesoporous single crystals have a great potential application to a micro-laser device due to their regular external morphology and ordered internal pore channel connectivity. The mesoporous silica single crystal with a cubic Pm3n structure has been synthesized successfully using a highly charged density tri-head group quaternary ammonium surfactant （C18-2-3-1） as a template and tetraethyl orthosilicate （TEOS） as an inorganic precursor in an acid medium through organic-inorganic cooperative assembly interaction. Scanning electron microscopy （SEM） observed that the mesoporous silica single crystal had a regular rhombic dodecahedron morphology with a uniform particle size of 5 μm. X-ray diffraction （XRD） and transmission electron microscopy confirmed that the calcined mesoporous single crystal had a cubic structure with Pm3n symmetry, and N2-sorption approach measured that the single crystal had a large BET surface area of 550 cm^2/g, large BJH pore volume of 0.20 cm^3/g and BJH pore size o f 2.4 nm.

关 键 词：单晶 介孔二氧化硅 菱形十二面体 立方相 形貌控制 

分 类 号：O613.72[理学—无机化学]