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Issue 11, 2017
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High-permeance metal–organic framework-based membrane adsorber for the removal of dye molecules in aqueous phase

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Abstract

This paper reports on a novel membrane adsorber comprising metal–organic frameworks (MOFs) for water treatment. Two types of MOF (ZIF-8 and ZIF-L) were grown within a porous α-alumina support to form a membrane for the adsorption of a dye molecule, rose bengal, in aqueous phase. The external surface of ZIF-L was shown to exhibit strong affinity for rose bengal. We also observed that small crystals (with a large external surface area) are beneficial to adsorption. The surfactant CTAB was used in the synthesis of ZIF-L-based membrane adsorbers in order to reduce the size of ZIF-L particles and increase the loading of ZIF-L within the membrane. The membrane adsorber synthesized with the highest concentration of CTAB achieved the highest dynamic adsorption capacity. The ZIF-L-based membrane adsorbers exhibited water permeance (approximately 2 × 104 L m−2 bar−1 h−1) far exceeding that of most existing membrane adsorbers.

Graphical abstract: High-permeance metal–organic framework-based membrane adsorber for the removal of dye molecules in aqueous phase

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Publication details

The article was received on 13 Jul 2017, accepted on 12 Sep 2017 and first published on 13 Sep 2017


Article type: Paper
DOI: 10.1039/C7EN00639J
Citation: Environ. Sci.: Nano, 2017,4, 2205-2214
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    High-permeance metal–organic framework-based membrane adsorber for the removal of dye molecules in aqueous phase

    H. Ting, H. Chi, C. H. Lam, K. Chan and D. Kang, Environ. Sci.: Nano, 2017, 4, 2205
    DOI: 10.1039/C7EN00639J

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