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Issue 30, 2014
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Bulk crystal seeding in the generation of mesopores by organosilane surfactants in zeolite synthesis

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Abstract

Zeolites of MOR, CHA, and FAU-X topologies were conventionally synthesized using Na+ or an organic structure-directing agent, except that organosilane surfactants were added as a mesopore-generating agent. The organosilanes were represented by the structural formula (CH3O)3Si–C3H6–N+(CH3)2CnH2n+1, where n was varied from 12 to 16 and 18. Each zeolite synthesis was seeded with a small amount of bulk zeolites of the same structure type. The synthesis result indicated that the bulk zeolite seeds disappeared completely from the zeolite products, indicating their disintegration into tiny fragments that were undetectable by high-resolution transmission electron microscopy. Nevertheless, the zeolite seeding caused a dramatic decrease in synthesis time. More importantly, crystal seeding, in comparison to unseeded synthesis, was highly effective in extending the organosilane-directed mesopore-generating strategy to a wide range of mesoporous and zeolite structures.

Graphical abstract: Bulk crystal seeding in the generation of mesopores by organosilane surfactants in zeolite synthesis

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Publication details

The article was received on 19 Apr 2014, accepted on 15 May 2014 and first published on 16 May 2014


Article type: Paper
DOI: 10.1039/C4TA01948B
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J. Mater. Chem. A, 2014,2, 11905-11912

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    Bulk crystal seeding in the generation of mesopores by organosilane surfactants in zeolite synthesis

    J. Kim, C. Jo, S. Lee and R. Ryoo, J. Mater. Chem. A, 2014, 2, 11905
    DOI: 10.1039/C4TA01948B

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