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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (10): 1093-1097. 上一篇    下一篇

研究论文

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

沈绍典*,a 蔡华强b 朱晓东c 凌龙云a 罗秋玲d
万全云a 毛东森a 卢冠忠*,a,d

  

  1. (a上海应用技术学院化工系工业催化研究所 上海 200235)
    (b复旦大学化学系 上海 200433)
    (c思百吉中国有限公司帕纳科业务部 上海 200233)
    (d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 上海 200237)

  • 投稿日期:2008-09-18 修回日期:2008-12-20 发布日期:2009-05-28
  • 通讯作者: 沈绍典

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

Shen, Shaodian *,a Cai, Huaqiang b Zhu, Xiaodong c Ling, Longyun a
Luo, Qiuling d Wan, Quanyun a Mao, Dongsen a Lu, Guanzhong *,a,d
  

  1. (a Research Institute of Applied Catalysis, Department of Chemical Engineering, Shanghai Institute of Technology,
    Shanghai 200235)
    (b Department of Chemistry, Fudan University, Shanghai 200433)
    (c Spectris Instrumentation & Systems Shanghai Ltd., Shanghai 200233)
    (d Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science
    and Technology, Shanghai 200237)
  • Received:2008-09-18 Revised:2008-12-20 Published:2009-05-28
  • Contact: Shen, Shaodian

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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(550 cm2/g), 较大的孔体积(BJH 0.20 cm3/g)和孔径(BJH 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

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 cm2/g, large BJH pore volume of 0.20 cm3/g and BJH pore size of 2.4 nm.

Key words: single crystal, mesoporous silica, rhombic dodecahedron, cubic, morphology control