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Issue 48, 2019
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Thioether-based recyclable metal–organic frameworks for selective and efficient removal of Hg2+ from water

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Abstract

Hg2+ is highly toxic and hazardous and widely found in polluted water. To remove mercury ions from wastewater, there is an urgent need to investigate and develop new adsorbents. Herein, we synthesized three novel thioether-based metal–organic frameworks (MOFs) through a facile diffusion method or a solvothermal strategy, i.e. [(ZnCl2)3(L1)2·χ(solvent)]n (1), [(Cu2I3O2)4(CH4N0.5)4(L1)4(DMA)4·3(H2O)·χ(solvent)]n (2) and [(CuBr2)2(L2)2 CH3CN·χ(solvent)]n (3), where L1 = 1,3,5-tris((pyridin-4-ylthio)methyl)benzene and L2 = 2,4,6-trimethoxy-1,3,5-tris((pyridin-4-ylthio)methyl)benzene. The obtained thioether-based MOFs were characterized by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis and thermogravimetric analysis. Further studies revealed that they could remove Hg2+ from water. They have high adsorptivity (up to 362 mg g−1) and are highly efficient in removing Hg2+ (up to 95%). Besides, these MOFs can be recycled and can selectively remove Hg2+ from water in the presence of other metal ions. Consequently, these MOFs are highly promising candidates for the selective absorption and removal of mercury ions from water.

Graphical abstract: Thioether-based recyclable metal–organic frameworks for selective and efficient removal of Hg2+ from water

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Publication details

The article was received on 18 Sep 2019, accepted on 18 Nov 2019 and first published on 19 Nov 2019


Article type: Paper
DOI: 10.1039/C9DT03714D
Dalton Trans., 2019,48, 17800-17809

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    Thioether-based recyclable metal–organic frameworks for selective and efficient removal of Hg2+ from water

    K. Li, J. Li, N. Zhao, T. Xie, B. Di and L. Xu, Dalton Trans., 2019, 48, 17800
    DOI: 10.1039/C9DT03714D

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