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    A porous graphene composite membrane intercalated by halloysite nanotubes for efficient dye desalination

    Access Status
    Fulltext not available
    Authors
    Zhu, L.
    Wang, H.
    Bai, J.
    Liu, Jian
    Zhang, Y.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhu, L. and Wang, H. and Bai, J. and Liu, J. and Zhang, Y. 2017. A porous graphene composite membrane intercalated by halloysite nanotubes for efficient dye desalination. Desalination. 420: pp. 145-157.
    Source Title
    Desalination
    DOI
    10.1016/j.desal.2017.07.008
    ISSN
    0011-9164
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/71956
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Elsevier B.V. Porous reduced graphene oxide (PRGO) was obtained by making pores on graphene oxide layers. Halloysite nanotubes, modified by Poly (sodium-p-styrenesulfonate) (PSS), were used to enlarge the interlayer spacing of PRGO. These two materials were immobilized on membrane surface through a time-saving, facile solvent evaporation method. The sandwich structure, formed through solvent evaporation process, provided additionally continuous pathway for water and salts, thus improving the water permeability of the composite membranes. Comprehensive characterizations of the materials were characterized by FT-IR, TEM, Raman, EDS and XRD. The composite membranes were characterized by SEM, FT-IR and EDS. The composite membranes exhibited a higher separation effect for salts and dye (i.e. 4.7% for MgSO4, 4.7% for MgCl2, 6.8% for NaCl, and 14.3% for Na2SO4; up to 97.9% for Reactive Black 5). The pure water permeation of composite membranes could reach as high as 8.8 L/(m2h bar). Hence, the graphene-based hybrid membranes presented a potential application in separation for salts and dyes.

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