用于二氧化碳吸附的离子液体功能化沸石咪唑酯骨架材料

Song Xuyan, Yu Jialin, Wei Min, Li Ran, Pan Xi, Yang Guoping, Tang Haolin

Technology Centre of Hubei China Tobacco Industry Co., LTD., Wuhan 430051, China.

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.

Materials (Basel). 2019 Jul 25;12(15):2361. doi: 10.3390/ma12152361.

Ionic-liquid-functionalized zeolitic imidazolate frameworks (ZIF) were synthesized using the co-ligands of 2-methylimidazole and amine-functionalized ionic liquid during the formation process of frameworks. The resulting ionic-liquid-modified ZIF had a specific surface area of 1707 m·g with an average pore size of about 1.53 nm. Benefiting from the large surface area and the high solubility of carbon dioxide in ionic-liquid moieties, the synthesized materials exhibited a carbon dioxide adsorption capacity of about 24.9 cm·g, whereas it was 16.3 cm·g for pristine ZIF at 25 °C under 800 mmHg. The results demonstrate that the modification of porous materials with ionic liquids could be an effective way to fabricate solid sorbents for carbon dioxide adsorption.

在框架形成过程中，使用2-甲基咪唑和胺功能化离子液体的共配体合成了离子液体功能化的沸石咪唑酯骨架（ZIF）。所得的离子液体改性ZIF的比表面积为1707 m·g，平均孔径约为1.53 nm。得益于大表面积以及二氧化碳在离子液体部分中的高溶解性，合成材料在25℃、800 mmHg下表现出约24.9 cm·g的二氧化碳吸附容量，而原始ZIF的该容量为16.3 cm·g。结果表明，用离子液体对多孔材料进行改性可能是制备用于二氧化碳吸附的固体吸附剂的有效方法。