Jump to main content
Jump to site search

Issue 37, 2009
Previous Article Next Article

Cyclic diquaternary ammoniums for nanocrystalline BEA, MTW and MFI zeolites with intercrystalline mesoporosity

Author affiliations

Abstract

3,10-Diazoniabicyclo[10.2.2]hexadeca-12,14,15-triene-3,3,10,10-tetramethyl-dichloride is an effective structure-directing agent for BEA zeolite under a high concentration of Na+. The pseudomorphic crystallization process led to nanocrystalline BEA particles possessing a large volume of intercrystalline mesopores. The synthesis of nanocrystalline zeolite has been extended to other cyclic diammonium compounds that can generate BEA, MTW and MFI zeolite structures. Phase diagrams for these nanocrystalline zeolites have been constructed using sodium silicate as a silica source. The nanocrystalline morphologies and intercrystalline mesoporosity have been characterized by electron microscopy and N2 adsorption. The result indicates that the pseudomorphic crystallization process is limited to BEA, and not MTW or MFI despite their nanocrystalline morphologies.

Graphical abstract: Cyclic diquaternary ammoniums for nanocrystalline BEA, MTW and MFI zeolites with intercrystalline mesoporosity

Back to tab navigation

Publication details

The article was received on 18 May 2009, accepted on 02 Jul 2009 and first published on 04 Aug 2009


Article type: Paper
DOI: 10.1039/B909792A
J. Mater. Chem., 2009,19, 6713-6719

  •   Request permissions

    Cyclic diquaternary ammoniums for nanocrystalline BEA, MTW and MFI zeolites with intercrystalline mesoporosity

    K. Na, M. Choi and R. Ryoo, J. Mater. Chem., 2009, 19, 6713
    DOI: 10.1039/B909792A

Search articles by author

Spotlight

Advertisements