Aqueous One-Step Modulation for Synthesizing Monodispersed ZIF-8 Nanocrystals for Mixed-Matrix Membrane

Xu Jiang, Shanshan He, Gang Han, Jun Long, Songwei Li, Cher Hon Lau, Sui Zhang, Lu Shao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Enhancing the monodispersity and surface properties of nanoporous zeolitic imidazolate frameworks (ZIFs) are crucial for maximizing their performance in advanced nanocomposites for separations. Herein, we developed an in situ method to synthesize monodispersed ZIF-8 nanocrystals with unique dopamine (DA) surface decoration layer (ZIF-8-DA) in an aqueous solution at room temperature. Interestingly, the in situ formation of the monodispersed ZIF-8-DA nanocrystals experiences a triple-stage crystallization process, resulting in a rhombic dodecahedron architecture, which is greatly different from the synthesis of conventional ZIF-8. The crystallinity and abundant microporosity of ZIF-8-DA nanocrystals is well maintained even with the DA surface decoration. Owing to the advanced surface compatibility and pore properties of ZIF-8-DA, ZIF-8-DA/Matrimid mixed-matrix membranes exhibit both higher gas permeability and selectivity than the pristine Matrimid polyimide membrane, which breaks out the traditional "trade-off"phenomena between permeability and selectivity.

Original languageEnglish
Pages (from-to)11296-11305
Number of pages10
JournalACS Applied Materials and Interfaces
Issue number9
Early online date24 Feb 2021
Publication statusPublished - 10 Mar 2021

Keywords / Materials (for Non-textual outputs)

  • dopamine modulation
  • mixed-matrix membrane
  • monodispersity
  • nucleation
  • ZIF-8


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