Issue 18, 2019

Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation

Abstract

An extremely simple one-step method was discovered to synthesize defect-free zeolitic imidazolate framework-8 (ZIF-8) films in aqueous solution by utilizing dopamine as a modulator. In situ dopamine polymerization is considered to inhibit the homogenous nucleation of ZIF-8 and slow down its heterogeneous nucleation, whilst the formed polydopamine facilitates the counter-diffusion growth of the ZIF-8 layer and patches the possible defects simultaneously. The designed ZIF-8 composite membrane exhibits exceptional separation performance with a H2/C3H8 permselectivity of 6688 and a C3H6/C3H8 permselectivity of 99, which can realize hydrogen and other energy-efficient continuous gas separation processes for sustainable clean energy.

Graphical abstract: Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation

Supplementary files

Article information

Article type
Communication
Submitted
06 dec 2018
Accepted
25 mar 2019
First published
25 mar 2019

J. Mater. Chem. A, 2019,7, 10898-10904

Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation

X. Jiang, S. Li, Y. Bai and L. Shao, J. Mater. Chem. A, 2019, 7, 10898 DOI: 10.1039/C8TA11748A

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