Commensurate stacking within confined ultramicropores boosting acetylene storage capacity and separation efficiency  

作　　者：Zhenghui Huang Kungang Chai Chengjun Kang Rajamani Krishna Zhaoqiang Zhang 

机构地区：[1]Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China [2]Department of Chemical and Biomolecular Engineering,National University of Singapore,Singapore 117585,Singapore [3]Van’t Hoff Institute for Molecular Sciences,University of Amsterdam,Park 904,Amsterdam 1098 XH,The Netherlands

出　　处：《Nano Research》2023年第5期7742-7748,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.21868002);Dean Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology(No.2021Z010).

摘　　要：Developing advanced porous materials possessing both a high storage capacity and selectivity for acetylene(C_(2)H_(2))remains challenging but a sought-after endeavor.Herein we show a strategy involving synergic combination of spatial confinement and commensurate stacking for enhanced C_(2)H_(2)storage and capture via maximizing the host–guest and guest–guest interactions.Two ultramicroporous metal-organic frameworks(MOFs),MIL-160 and MOF-303 are elaborately constructed to exhibit ultrahigh C_(2)H_(2)uptakes of 235 and 195 cm^(3)·g^(−1),respectively,due to the confinement effect of the suitable pore sizes and periodically dispersed molecular recognition sites.Specially,C_(2)H_(2)capacity of MIL-160 sets a new benchmark for C_(2)H_(2)storage.The exceptional separation performances of two materials for C_(2)H_(2)over both CO_(2)and ethylene(C_(2)H_(4)),which is rarely observed,outperform most of the benchmark materials for C_(2)H_(2)capture.We scrutinized the origins of ultrahigh C_(2)H_(2)loading in the confined channels via theoretical investigations.The superior separation efficiency for C_(2)H_(2)/CO_(2)and C_(2)H_(2)/C_(2)H_(4)mixtures with unprecedented C_(2)H_(2)trapping capacity(>200 L·kg^(−1))was further demonstrated by dynamic breakthrough experiments.

关 键 词：adsorption and separation acetylene storage commensurate stacking gas cluster metal-organic frameworks 

分 类 号：O64[理学—物理化学]