Amino-functionalized metal–organic framework for adsorption and separation of dichloromethane and trichloromethane
Amino-functionalized metal–organic framework for adsorption and separation of dichloromethane and trichloromethane
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用于吸附和分离二氯甲烷和三氯甲烷的氨基功能化金属有机框架
DOI：
10.1039/c6ra07637h
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发表时间：
2016-07
期刊：
影响因子：
3.9
通讯作者：
Yunlin Chen
中科院分区：
文献类型：
--
作者：
Fengming Tian;Xinghua Zhang;Yunlin Chen
成功合成了锌基金属有机骨架MOF-5及其氨基功能化形式IRMOF-3，并对其吸附和分离二氯甲烷（DCM）和三氯甲烷（TCM）的性能进行了表征和评价。测定了DCM和TCM在298 K、308 K和318 K下的吸附平衡和动力学。尽管IRMOF-3的孔隙率降低，但DCM和TCM的吸附量比MOF-5分别提高了24.5%和27.4%。因此，MOF中额外的氨基赋予了MOF额外的吸附能力。利用理想吸附溶液理论（IAST）方法预测了DCM和TCM的二元吸附选择性和扩散选择性。在298 K和2.8 kPa下，DCM/TCM在IRMOF-3上的吸附选择性和扩散选择性分别为5.62和3.88，均高于MOF-5。对IRMOF-3（含氨基）的吸附能力、吸附选择性和扩散选择性的增强可能是由于DCM和TCM与MOF上氨基的相互作用增强所致。
Zinc-based metal organic framework MOF-5, and its amino-functionalized form IRMOF-3 were successfully synthesized, characterized, and evaluated for the adsorption and separation of dichloromethane (DCM) and trichloromethane (TCM). Adsorption equilibria and kinetics of DCM and TCM on the two samples were measured at 298 K, 308 K, and 318 K. In spite of the reduced porosity of IRMOF-3, the adsorption capacities of DCM and TCM were improved up to 24.5% and 27.4% when compared with MOF-5. Therefore, the additional amino group in the MOF imparts extra adsorption capability on the MOF. The binary adsorption selectivity and diffusion selectivity of DCM and TCM were predicted via the Ideal Adsorbed Solution Theory (IAST) method. The adsorption selectivity and diffusion selectivity of DCM/TCM on the IRMOF-3 were about 5.62 and 3.88 at 298 K and 2.8 kPa, which were higher than those of MOF-5. The improved adsorption capacity and enhanced adsorption selectivity and diffusion selectivity over IRMOF-3 (with amino group) could be attributed to the improved interaction of DCM and TCM with the amino group on the MOF.
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