Thioether-based recyclable metal–organic frameworks for selective and efficient removal of Hg<sup>2+</sup> from water
作者:Kan Li、Jing-jing Li、Ni Zhao、Ting-ting Xie、Bin Di、Li-li Xu
DOI:10.1039/c9dt03714d
日期:——
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
Hg 2+具有剧毒和危险性,广泛存在于污水中。为了从废水中去除汞离子,迫切需要研究和开发新的吸附剂。在这里,我们通过一种简便的扩散方法或溶剂热策略合成了三种新颖的基于硫醚的金属有机骨架(MOF),即[(ZnCl 2)3(L 1)2 · χ(溶剂)] n(1),[ (Cu 2 I 3 O 2)4(CH 4 N 0.5)4(L 1)4(DMA)4 ·3(H 2 O)· χ(溶剂)] n(2)和[(CuBr 2)2(L 2)2 CH 3 CN· χ(溶剂)] n(3),其中L 1= 1,3,5-三((吡啶-4-基硫基)甲基)苯,L 2= 2,4,6-三甲氧基-1,3,5-三((吡啶-4-基硫基)甲基)苯。通过单晶X射线衍射,傅立叶变换红外光谱,元素分析和热重分析对所得的基于硫醚的MOF进行表征。进一步的研究表明,它们可以去除Hg 2+从水。它们具有高吸附性(最高达362 mg g -1),并且高效去除Hg