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  • Title: Growing ZIF-8 Seeds on Charged COF Substrates toward Efficient Propylene-Propane Separation Membranes.
    Author: Pu Y, Zhao M, Liang X, Wang S, Wang H, Zhu Z, Ren Y, Zhang Z, He G, Zhao D, Jiang Z.
    Journal: Angew Chem Int Ed Engl; 2023 May 22; 62(22):e202302355. PubMed ID: 36971597.
    Abstract:
    We report a covalent organic framework (COF) induced seeding strategy to fabricate metal-organic framework (MOF) membranes. Contrary to graphene oxide nuclei-depositing substrate, COF substrate has uniform pore size, high microporosity and abundant functional groups. We designed a series of charged COF nanosheets to induce the formation of ZIF-8@COF nanosheet seeds with high aspect ratio over 150, which were readily processed into a compact and uniform seed layer. The resulting ZIF-8 membranes with thickness down to 100 nm exhibit an ultrahigh C3 H6 /C3 H8 separation performance and superior long-term stability. Our strategy is also validated by fabricating ultrathin ZIF-67 and UiO-66 membranes.
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