Li Xiaoqian, Mao Zhuojun, He Zhongjie, Su Fangfang, Li Mingtao, Jiang Maogang, Chao Shuaijun, Zheng Yaping, Liang Jiahe
Department of Ultrasonic Medicine, 3D Printing Research Center, Tang Du Hospital, Air Force Medical University, No. 569 of Xin Si Road, Xi'an, Shaanxi 710038. P. R. China.
School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, P. R. China.
ACS Appl Mater Interfaces. 2023 Nov 8;15(44):51582-51592. doi: 10.1021/acsami.3c10874. Epub 2023 Oct 25.
Yolk-shell metal-organic framework (YS-MOF) liquids are candidate materials in large-size species with high-efficiency separation, owing to their hierarchical porosity, faster mass transfer, better compatibility, and higher solution processability than MOF liquids with micropores. Nevertheless, facile synthesis strategies of yolk-shell porous ionic liquids (YSPILs) with regulations of size and morphology are an ongoing challenge. Herein, we propose a general strategy to construct YSPILs based on Z67@PDA with tunable core sizes and morphologies. Benefiting from the unique hierarchical yolk-shell structure, as-prepared YSPILs exhibit promise in CH/CH capture and separation with the increased sizes of core in yolk-shell ZIF-67@PDA. Advanced YS-MOF liquids have improved the adsorption properties and increased our ability to tailor chemical composition and pore architecture. Impressively, the adsorption capacity of CH and CH of YSPILs exhibits an approximately 3-fold enhancement compared with that of the neat ILs, confirming that the accessible porosities are retained. Effective CH/CH separation performance of YSPILs over PILs based on ZIF-67, revealing the hierarchical porosity of YS-Z67@PDA liquids, benefits larger-size gas separation. Therefore, we believe that this work can not only help us to rationally design novel hierarchically porous ionic liquids but also promote candidate applications in large-size species separation, catalysis, and nanoreactors.
蛋黄壳金属有机框架（YS-MOF）液体因其具有分级孔隙率、更快的传质速率、更好的兼容性以及比具有微孔的MOF液体更高的溶液可加工性，而成为大尺寸物种中高效分离的候选材料。然而，具有尺寸和形态调控的蛋黄壳多孔离子液体（YSPIL）的简便合成策略仍是一个持续存在的挑战。在此，我们提出了一种基于Z67@PDA构建具有可调核心尺寸和形态的YSPIL的通用策略。受益于独特的分级蛋黄壳结构，所制备的YSPIL在CH/CH捕获和分离方面展现出潜力，随着蛋黄壳ZIF-67@PDA中核心尺寸的增加。先进的YS-MOF液体改善了吸附性能，并提高了我们定制化学成分和孔隙结构的能力。令人印象深刻的是，YSPIL对CH和CH的吸附容量与纯离子液体相比提高了约3倍，证实了可及孔隙率得以保留。YSPIL相对于基于ZIF-67的PIL具有有效的CH/CH分离性能，揭示了YS-Z6核壳结构的优势，有利于更大尺寸气体的分离。因此，我们相信这项工作不仅有助于我们合理设计新型分级多孔离子液体，还能促进在大尺寸物种分离、催化和纳米反应器中的候选应用。
