Facilitate Gas Transport through Metal-Organic Polyhedra Constructed Porous Liquid Membrane
Facilitate Gas Transport through Metal-Organic Polyhedra Constructed Porous Liquid Membrane
复制标题
通过金属有机多面体构造的多孔液膜促进气体传输
DOI：
10.1002/smll.201907016
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发表时间：
2020-03-01
期刊：
影响因子：
13.3
通讯作者：
Peng, Xinsheng
中科院分区：
文献类型：
--
作者：
Deng, Zheng;Ying, Wen;Peng, Xinsheng
第二类多孔液体被证明是有前途的多孔材料。然而，多孔基质的种类非常有限。在这里，一个多孔的主机金属有机多面体（MOP-18）的报道，以构建II型多孔液体。将MOP-18溶解于15-冠-5中作为单个笼（5 nm）。分子动力学模拟和实验重力CO2溶解度测试表明，MOP-18在多孔液体中的内腔未被15-冠-5占据，并且可以进入CO2。因此，所制备的多孔液体显示出增强的气体溶解性。此外，制备的多孔液体封装到氧化石墨烯（GO）纳米狭缝，形成GO支撑的多孔液膜（GO-SPLM）。由于MOP-18单元笼在多孔液体中的空腔降低了气体扩散屏障，GO-SPLM显著提高了气体的渗透性。
Type II porous liquids are demonstrated to be promise porous materials. However, the category of porous hosts is very limited. Here, a porous host metal-organic polyhedra (MOP-18) is reported to construct type II porous liquids. MOP-18 is dissolved into 15-crown-5 as an individual cage (5 nm). Both the molecular dynamics simulations and experimental gravimetric CO2 solubility test indicate that the inner cavity of MOP-18 in porous liquids is unoccupied by 15-crown-5 and is accessible to CO2. Thus, the prepared porous liquids show enhanced gas solubility. Furthermore, the prepared porous liquid is encapsulated into graphene oxide (GO) nanoslits to form a GO-supported porous liquid membrane (GO-SPLM). Owing to the empty cavity of MOP-18 unit cages in porous liquids that reduces the gas diffusion barrier, GO-SPLM significantly enhances the permeability of gas.