Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (08): 1519-1523.doi: 10.3866/PKU.WHXB20080833

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Mechanism of Acidity-Induced Mesostructure Transformation for Highly Ordered Mesoporous Silica Materials and Their Functionalizations

JIN Zheng-Wei; WANG Xiao-Dong   

  1. School of Packaging and Printing Engineering, Tianjin University of Science and Technology, Tianjin 300222, P. R. China; School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2008-02-21 Revised:2008-04-14 Published:2008-08-06
  • Contact: JIN Zheng-Wei

Abstract: Highly ordered mesoporous silica materials were synthesized by templating with a nonionic triblock copolymer (Pluronic P104(PEO27-PPO61-PEO27)) via a two-step pathway in mildly acidic conditions. The mechanism of this transformation was also investigated. It was found that a mesostructure transformation could be induced by adjusting acidity from the SBA-15 type 2-dimentional hexagonal channel mesostructure (pH=1.51-2.67) to the MSU-X type with 3-dimentional worm-like mesostructure (pH=3.93-4.56) in the same synthetic system. After modified by γ-(aminopropyl) triethoxysilane (APTES) under the same condition, it was indicated that the MSU-X type was more easily modified by APTES than SBA-15 type.

Key words: Mesoporous silica material, Acidity-induced, Mesostructure transformation, Surface modification


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