吸附
化学
溴化物
离子液体
金属有机骨架
金属
化学工程
无机化学
催化作用
物理化学
有机化学
工程类
作者
TingTing Wang,B. Meng,Yang Zhou,Yuan Wang,Lei Wang,Lifeng Ding,Yu Zhou,Jun Wang
摘要
Abstract High tunability of both ionic liquids (ILs) and metal organic frameworks (MOFs) enables great opportunity in the rational designation of IL/MOF composites for physical adsorption and separation. Traditionally, cations and anions of ILs as an entirety are combined with MOFs either inside or outside the microchannels. Herein, organic cations of ILs were confined into Cu‐BTC and the champion adsorbent is obtained by using 1‐propionic acid‐3‐vinylimidazole bromide as the precursor with a moderate loading amount, exhibiting higher CO 2 uptakes of 8/5 mmol g −1 than Cu‐BTC (6.0/3.5 mmol g −1 ) at 273/298 K and 100 kPa, associating with significantly improved CO 2 /N 2 (CH 4 ) selectivities. The organic cations are interacted with two adjacent CuII 2 (CRO 2 ) 2 paddle wheel units of Cu‐BTC, expanding the CuO bond to strengthen the CO 2 affinity of open Cu sites and also serving as an additive CO 2 adsorptive site. The promotion of CO 2 capture ability is further reflected in the dynamic column breakthrough experiment.
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