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Issue 39, 2018
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Formation of morphologically confined nanospaces via self-assembly of graphene and nanospheres for selective separation of lithium

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Abstract

Selective separation of lithium ions is crucial to recycle lithium from saline lakes. Here, a novel multilayer framework membrane was constructed based on graphene oxide and sulfonated amino-polystyrene nanospheres (rGO@SAPS) via amide condensation reaction and self-assembly. With the large specific surface area of these nanospheres and the anchored multitudinous sulfonate groups and amino groups, the synthesized rGO@SAPS formed unique membranes with morphologically confined nanospaces, and are applicable for the selective separation of Li+ under an electric field. It was estimated that in an electrodialysis system (solution velocity 250 mL min−1, current density 12.73 mA cm−2 and membrane thickness 10 μm), the selective separation efficiency parameter (retention or separation parameter between two different ions) of Mg2+/Li+ and K+/Li+ of rGO@SAPS-2 in 20 min is 46.13% and 9.90%, respectively.

Graphical abstract: Formation of morphologically confined nanospaces via self-assembly of graphene and nanospheres for selective separation of lithium

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Publication details

The article was received on 18 Jul 2018, accepted on 12 Sep 2018 and first published on 13 Sep 2018


Article type: Communication
DOI: 10.1039/C8TA06945J
Citation: J. Mater. Chem. A, 2018,6, 18859-18864
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    Formation of morphologically confined nanospaces via self-assembly of graphene and nanospheres for selective separation of lithium

    Y. Zhao, C. Zhou, J. Wang, H. Liu, Y. Xu, J. W. Seo, J. Shen, C. Gao and B. Van der Bruggen, J. Mater. Chem. A, 2018, 6, 18859
    DOI: 10.1039/C8TA06945J

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