Zeolitic imidazolate frameworks-based porous liquids with low viscosity for CO2 and toluene uptakes
Zeolitic imidazolate frameworks-based porous liquids with low viscosity for CO2 and toluene uptakes
复制标题
基于沸石咪唑酯骨架的多孔液体，具有低粘度，可吸收二氧化碳和甲苯
DOI：
10.1016/j.cej.2021.129239
复制
发表时间：
2021-03-16
影响因子：
15.1
通讯作者：
Li, Mingtao
中科院分区：
文献类型：
--
作者：
Li, Xiaoqian;Wang, Dechao;Li, Mingtao
Porous liquids (PLs) as a novel class of materials combine the permanent porosity of microporous solids, the rapid mass transfer of liquids, and fluidity, thus exhibiting extraordinary promise for gas capture and separation. However, the practical application of PLs was severely restricted by their undesirable relative high viscosity and melting temperature. In this work, the symmetric dicationic ionic liquids [C(6)BIm(2)][NTf2](2) was synthesized as a steric hindrance solvent to construct a type of low viscosity zeolitic imidazolate frameworks (ZIFs)-based PLs. Specifically, the ZIF-67-PLs-2 (i.e., ZIF-67 loading of 2.0% in PLs) presented a low viscosity with 543.4 mPa.S at 25 degrees C, which was about 20 times lower than that of type III PLs reported previously. Meanwhile, ZIF-67-PLs showed long-term stability even over 180 days and broke the fluidity limitation down to 64 degrees C, broadening the work conditions. Moreover, ZIF-67-PLs-10 (i.e., ZIF-67 loading of 10.0% in PLs) achieved 55 times CO2 and 7 times toluene adsorption capacity more than those of the corresponding pure DILs, respectively. Remarkably, the fascinating features of ZIF-67-PLs including lower viscosity, wide liquid range and higher adsorption pave a new way for the optimal design of novel PLs towards gas uptake and separation.
