Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (02): 226-230. Previous Articles     Next Articles

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有序介孔碳的合成及其相转变机理的研究

李猛,俞建长*   

  1. (福州大学材料科学与工程学院 福州 350108)
  • 投稿日期:2010-07-04 修回日期:2010-08-20 发布日期:2010-09-26
  • 通讯作者: 李猛 E-mail:limeng42525@163.com
  • 基金资助:

    福建省自然科学基金

Synthesis and Phase Transition of Ordered Mesoporous Carbon

LI Meng, YU Jian-Chang   

  1. (College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108)
  • Received:2010-07-04 Revised:2010-08-20 Published:2010-09-26

Mesoporous silica materials have been synthesized at low temperature under alkaline condition using tetraethyl orthosilicate as the silica source and cetyltrimethylammonium bromide as the structure directing agent. And the ordered mesoporous carbon was synthesized by liquid impregnation method with sucrose as the carbon precursor and mesoporous silica as template. The resulting materials were characterized by X-ray di?raction, transmission electron microscopy and N2 adsorption-desorption. The results show that the mesoporous materials have highly ordered structure, high specific surface area (mesoporous silica, 992~1096 m2/g; mesoporous carbon, 930~1208 m2/g), large pore volume and narrow pore size distribution. In addition, with the rising of reaction temperature, the phase transformation of mesoporous silica from hexagonal p6mm to cubic Ia3d was observed, and the structure of mesoporous carbon replicated from silica template transformed from cubic Ia3d to tetragonal I41/a. The preliminary discussion on phase transition was carried on.

Key words: mesoporous silica, mesoporous carbon, phase transition

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