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

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 heteroge...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (18), p.10898-10904
Main Authors: Jiang, Xu, Li, Songwei, Bai, Yongping, Shao, Lu
Format: Article
Language:English
Subjects:
Aqueous solutions
Clean energy
Counterdiffusion
Diffusion layers
Dopamine
Energy efficiency
Gas separation
Hydrogen-based energy
Membranes
Metal-organic frameworks
Nucleation
Paraffin
Paraffins
Polymerization
Purification
Separation processes
Zeolites
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Summary: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 H 2 /C 3 H 8 permselectivity of 6688 and a C 3 H 6 /C 3 H 8 permselectivity of 99, which can realize hydrogen and other energy-efficient continuous gas separation processes for sustainable clean energy.
ISSN:2050-7488
2050-7496
DOI:10.1039/C8TA11748A