Synthesis of Self-Pillared Zeolite Nanosheets by Repetitive Branching

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Hierarchical zeolites are a class of microporous catalysts and adsorbents that also contain mesopores, which allow for fast transport of bulky molecules and thereby enable improved performance in petrochemical and biomass processing. We used repetitive branching during one-step hydrothermal crystal growth to synthesize a new hierarchical zeolite made of orthogonally connected microporous nanosheets. The nanosheets are 2 nanometers thick and contain a network of 0.5-nanometer micropores. The house-of-cards arrangement of the nanosheets creates a permanent network of 2- to 7-nanometer mesopores, which, along with the high external surface area and reduced micropore diffusion length, account for higher reaction rates for bulky molecules relative to those of other mesoporous and conventional MFI zeolites.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2012-06
Language
English
Article Type
Article
Keywords

HETEROEPITAXIAL GROWTH; INTERGROWTH; MEMBRANES; NANOCRYSTALS; PRECURSOR; MEL

Citation

SCIENCE, v.336, no.6089, pp.1684 - 1687

ISSN
0036-8075
DOI
10.1126/science.1221111
URI
http://hdl.handle.net/10203/103763
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