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A Review on Anion-Pillared Metal Organic Framework (Apmof) and its Composites with the Balance of Adsorption Capacity and Separation Selectivity for Efficient Gas Separation

2022; RELX Group (Netherlands); Linguagem: Inglês

10.2139/ssrn.4076661

1556-5068

Xufei Li, Hui Bian, Weiqiu Huang, Baoyou Yan, Xinya Wang, Bing Zhu,

Covalent Organic Framework Applications

Metal organic framework (MOF) materials have gained widespread attention in many fields, especially in gas adsorption and separation. However, traditional MOFs always suffer from a trade-off (i.e., adsorption capacity and separation selectivity) effect when separating some challenging and similar gas mixtures. As one type of promising MOFs, anion-pillared MOF (APMOF) materials are designed by introducing a third member of anion pillar with abundant hydrogen-bonding acceptors (e.g., F, O and H), which are capable of overcoming the technical bottleneck of the trade-off owing to novel synergistic effects combined pore size/shape and chemistry. With the dramatic increase in the number of reported APMOFs, a comprehensive review of their structures and properties is necessary to better understand this hot topic. In this review, various type of APMOFs with diversity topologies and building blocks are categorised by anions, such as MFSIX, POXF, DICRO, BSF, MOFOUR, and the like. In addition, recent progresses for gas separation on APMOFs and their composites are also comprehensively focused on, including CO 2 separation, C 2 H 4 purification, C 3 H 6 purification, C 4 isomers separation, C 5 olefins separation, xylene isomers separation, and Xe/Kr separation. Furthermore, some important issues concerning the design strategies and corresponding applications are emphasized, which should attract more and more attentions in the future.