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Citation: JIN Zheng-Wei, WANG Xiao-Dong. Mechanism of Acidity-Induced Mesostructure Transformation for Highly Ordered Mesoporous Silica Materials and Their Functionalizations[J]. Acta Physico-Chimica Sinica, ;2008, 24(08): 1519-1523. doi: 10.3866/PKU.WHXB20080833 shu

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

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 Date: 21 February 2008
Available Online: 5 June 2008

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 hexa nal 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.
- Mesoporous silica material; Acidity-induced; Mesostructure transformation; Surface modification
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沈阳化工大学材料科学与工程学院沈阳 110142

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