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Formation of Morphologically Confined Nanospace via Self-assembly of Graphene and Nanospheres for Selective Separation of Lithium

Abstract

Selective separation of lithium ions is crucial to recycle lithium from saline lakes. Here, a novel organic-inorganic multilayer framework membrane has been constructed based on graphene and sulfonated amino-polystyrene nanospheres (rGO@SAPS) through a self-assembly process. 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 nanospace, which are applicable for the selective separation of Li+ under an electric field. In view of the similar properties of metal ions, separating Mg2+ and K+ is a key process in Li+ extraction from saline lakes. Due to the difference in binding affinity to sulfonate groups, which causes differences in ion exchange capacity and size sieving effects, the synthesized rGO@SAPS membranes have an outstanding selectivity for Li+.

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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, Accepted Manuscript
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    Formation of Morphologically Confined Nanospace 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, Accepted Manuscript , DOI: 10.1039/C8TA06945J

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