Tailoring the Transport Properties of Zeolitic Imidazolate Frameworks by Post-Synthetic Thermal Modification

Chen Zhang, William J. Koros

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Understanding how to control transport properties of zeolitic imidazolate frameworks (ZIFs) is critical to extend ZIF-based membranes and adsorbents to a wide spectrum of gas and vapor separations. In this work, we report a facile post-synthetic thermal modification (PSTM) technique to tailor ZIFs' transport properties by balancing diffusivity and diffusion selectivity. With controllable dissociation of framework methyl groups from a precursor ZIF (ZIF-8), we have prepared thermally modified ZIFs showing substantially increased n-butane diffusivity and attractive n/iso-butane diffusion selectivity. Hybrid ZIF/polymer mixed-matrix membranes formed using these thermally modified ZIFs are expected to deliver attractive butane isomer separation performance. Membranes based on such materials can potentially be used to retrofit refinery alkylation units for producing premium gasoline blending stocks.
Original languageEnglish (US)
Pages (from-to)23407-23411
Number of pages5
JournalACS Applied Materials & Interfaces
Volume7
Issue number42
DOIs
StatePublished - 2015
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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