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Acta Chimica Sinica >

2012 , Vol. 70 >Issue 23: 2419 - 2424

DOI: https://doi.org/10.6023/A12080533

Article

Synthesis of Zeolite/Mesoporous Silica Composite Microspheres by Microemulsion Method

  • Sun Bo ,
  • Guo Yong ,
  • Xu Le ,
  • Huang Zhehao ,
  • Wu Peng ,
  • Che Shunai
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  • a School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240;
    b Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062

Received date: 2012-08-09

  Online published: 2012-11-05

Supported by

Project supported by the National Natural Science Foundation of China (Nos. 20890121, 20925310 and U1162102) and Ministry of Science and Technology (Nos. 2009CB930403 and 2012BAE05B02).

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Abstract

Zeolite/mesoporous silica composite microspheres (ZMMS) have been prepared by self-assembling mesoporous silica phase with Y or Ti-MWW zeolites crystallites in a simple microemulsion system. The synthesis process involved the formation of a stable O/W microemulsion from silica precursor of tetrabutyl orthosilicate and cationic quaternary ammonium surfactants as well as a simultaneous assembling of zeolite into the oil phase by their hydrophobic interaction, in which mesoporous silica was formed by self-assembling of surfactant and silica source. Through optimizing synthesis conditions, the ZMMS materials were prepared to possess controllable mass ratio of zeolite to mesoporous silica (0—2.3) and sphere diameter (186—965 μm). The mesopore sizes of the ZMMSs were 3.75 (zeolite-Y/MMSs) and 3.98 nm (Ti-MWW/MMSs). In the liquid-phase ammoximation of cyclohexanone, Ti-MWW/mesoporous silica microspheres showed a high mechanical stability and a catalytic activity comparable to the parent Ti-MWW powders.

Key words： zeolite microsphere; micro/mesoporous composite; microemulsion; zeolite-Y; Ti-MWW

Cite this article

Sun Bo , Guo Yong , Xu Le , Huang Zhehao , Wu Peng , Che Shunai . Synthesis of Zeolite/Mesoporous Silica Composite Microspheres by Microemulsion Method[J]. Acta Chimica Sinica, 2012 , 70(23) : 2419 -2424 . DOI: 10.6023/A12080533

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