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    Ultra-Permeable Dual-Mechanism-Driven Graphene Oxide Framework Membranes for Precision Ion Separations

    95753.pdf (1.542Mb)
    Access Status
    Open access
    Authors
    Guo, J.
    Zhang, Y.
    Yang, F.
    Mamba, B.B.
    Ma, J.
    Shao, L.
    Liu, Shaomin
    Date
    2023
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Guo, J. and Zhang, Y. and Yang, F. and Mamba, B.B. and Ma, J. and Shao, L. and Liu, S. 2023. Ultra-Permeable Dual-Mechanism-Driven Graphene Oxide Framework Membranes for Precision Ion Separations. Angewandte Chemie - International Edition. 62 (23): pp. e202302931-.
    Source Title
    Angewandte Chemie - International Edition
    DOI
    10.1002/anie.202302931
    ISSN
    1433-7851
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP180103861
    http://purl.org/au-research/grants/arc/IH170100009
    URI
    http://hdl.handle.net/20.500.11937/95989
    Collection
    • Curtin Research Publications
    Abstract

    Two-dimensional graphene oxide (GO) membranes are gaining popularity as a promising means to address global water scarcity. However, current GO membranes fail to sufficiently exclude angstrom-sized ions from solution. Herein, a de novo “posterior” interfacial polymerization (p-IP) strategy is reported to construct a tailor-made polyamide (PA) network in situ in an ultrathin GO membrane to strengthen size exclusion while imparting a positively charged membrane surface to repel metal ions. The electrostatic repulsion toward metal ions, coupled with the reinforced size exclusion, synergistically drives the high-efficiency metal ion separation through the synthesized positively charged GO framework (PC-GOF) membrane. This dual-mechanism-driven PC-GOF membrane exhibits superior metal ion rejection, anti-fouling ability, good operational stability, and ultra-high permeance (five times that of pristine GO membranes), enabling a sound step towards a sustainable water-energy-food nexus.

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