Amyloid-intercalated graphene oxide membranes for enhanced nanofiltration

LIN, AC, XIE, F, CHANG, R, BEAVER, N, DREWERY, Claire, COLLINS, C, LEHR, C, JONES, EM and ZHANG, S (2021). Amyloid-intercalated graphene oxide membranes for enhanced nanofiltration. Carbon Trends, 5: 100135, p. 100135.

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Link to published version:: https://doi.org/10.1016/j.cartre.2021.100135
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    Abstract

    We report on fast pressure-driven nanofiltration of strong GO membranes intercalated by protein amyloid fibrils. We investigate the effect of protein amyloid fibril loading on membrane properties including the membrane stability, microstructure, reflux rate, permeance, rejection rate and fouling resistance. With increasing amyloid fibrils, the membrane becomes smooth and resilient and can be reused for many times with little disintegration. Microstructure analysis shows that amyloid fibrils enable expansion of the interlayer spacing between GO sheets, leading to around 100% increase in average water permeance of the 100 nm thick membrane (15.6 L⋅m−2⋅hr−1⋅bar−1) compared to the neat GO membrane (8.8 L⋅m−2⋅hr−1⋅bar−1). The hybrid membranes display improved moderate ion rejection (44–51%) of heavy metal salts and high molecular rejection (>97%) of organic dyes. Antifouling performance is evaluated in terms of flux recovery ratio and fouling ratios. The incorporation of amyloid fibrils enable GO membranes to change from irreversible fouling to reversible fouling and the hybrid membrane exhibits significantly enhanced flux recovery (>95%). A possible nanofiltration mechanism is proposed to explain the observations.

    Item Type: Article
    Identification Number: https://doi.org/10.1016/j.cartre.2021.100135
    Page Range: p. 100135
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 30 Jun 2022 11:29
    Last Modified: 30 Jun 2022 11:29
    URI: http://shura.shu.ac.uk/id/eprint/30397

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