吸附
材料科学
复合数
化学工程
多孔性
离子液体
金属有机骨架
露点
分子
复合材料
有机化学
化学
催化作用
热力学
物理
工程类
作者
Xingping Gu,Guopeng Han,Qingyuan Yang,Dahuan Liu
标识
DOI:10.1002/admi.202102354
摘要
Abstract Water adsorption based on porous materials is of fundamental importance in atmospheric water harvesting and dehumidification. Herein, a [BOHmim][Zn 2 Cl 5 ]@MIL‐101(Cr) composite with multiple adsorption sites is designed to enhance the water adsorption capacity. It is interesting to observe that there is a water‐responsive confinement–unconfinement transformation of ionic liquids (ILs) during the water adsorption and release process. Thus, it can simultaneously overcome the limitation of pore volume in traditional porous materials, and the problem of mass transfer in pure ILs. As a result, the obtained IL@MOF composite achieves a high water adsorption capacity (477 wt%) at 298 K and RH = 95%, which can be released under relatively mild operating conditions (313 K, RH = 40%). This work provides a general way to develop adsorbents for the capture of molecules with high polarity and low dew‐point in combination with the advantages of ILs and metal–organic frameworks (MOFs).
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