物理化学学报 >> 2009, Vol. 25 >> Issue (01): 150-154.doi: 10.3866/PKU.WHXB20090127

研究论文 上一篇    下一篇

pH对两步法非离子模板合成MSU-X类硅基介孔结构的影响

金政伟; 刘长玲; 梁浩   

  1. 天津科技大学包装与印刷工程学院, 天津 300222; 吉林化工学院化工与材料工程学院, 吉林 吉林 132022; 北京化工大学制药工程系, 北京 100029
  • 收稿日期:2008-08-13 修回日期:2008-09-16 发布日期:2008-12-31
  • 通讯作者: 金政伟 E-mail:jzhengw@tust.edu.cn

Effects of pH on the Structure of Non-Ionically Templated MSU-X Mesoporous Silica via a Two-Step Synthesis

JIN Zheng-Wei; LIU Chang-Ling; LIANG Hao   

  1. School of Packaging and Printing Engineering, Tianjin University of Science and Technology, Tianjin 300222, P. R. China; College of Chemical and Materials Engineering, Jilin Institute of Chemical Technology, Jilin 132022, Jilin Province, P. R. China; Department of Pharmaceutical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2008-08-13 Revised:2008-09-16 Published:2008-12-31
  • Contact: JIN Zheng-Wei E-mail:jzhengw@tust.edu.cn

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摘要： 采用两步法以非离子型表面活性剂Tween 20为模板剂合成硅基介孔材料, 研究了pH对介孔材料结构的影响. 结果表明, 没有氟离子存在且模板剂浓度较低(约为2%(w))的条件下, 在弱酸性环境中(pH=3.32-4.26)可以制备有序的MSU-X类硅基介孔材料, 本研究中的简单合成体系有助于查明MSU-X合成机理. 对所得介孔材料测试表明, 在同样的合成体系中, 随着体系pH的变化, 所得硅基介孔材料的形貌和孔壁结构都发生了变化.

关键词: 两步法, MSU-X, 硅基介孔, Tween 20

Abstract: Highly ordered MSU-X type mesoporous silica was synthesized by using ethoxylated derivatives of fatty esters of sorbitan (Tween 20) as template via a two-step pathway under mildly acidic conditions (pH=3.32-4.26) without the addition of fluoride. The template concentration (ca 2% (w)) is much lower than for conventional synthetic routes and the synthetic medium is much simpler than that used for other two-step pathways. The obtained materials have high specific surface areas, large pore volumes, and thick pore walls. Transformations of exterior morphologies and inner structure of mesoporous silica were found by varying the pH and keeping all other conditions constant.

Key words: Two-step synthesis, MSU-X, Mesoporous silica, Tween 20