Fabrication of COF-MOF Composite Membranes and Their Highly Selective Separation of H 2 /CO 2

作者：Jingru Fu, Saikat Das, Guolong Xing, Teng Ben, Valentin Valtchev, Shilun Qiu · 发表于：Journal of the American Chemical Society · 年份：2016 · DOI：10.1021/jacs.6b03348 · 被引用次数：616 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Covalent Organic Framework Applications、Membrane Separation and Gas Transport

The search for new types of membrane materials has been of continuous interest in both academia and industry, given their importance in a plethora of applications, particularly for energy-efficient separation technology. In this contribution, we demonstrate for the first time that a metal-organic framework (MOF) can be grown on the covalent-organic framework (COF) membrane to fabricate COF-MOF composite membranes. The resultant COF-MOF composite membranes demonstrate higher separation selectivity of H2/CO2 gas mixtures than the individual COF and MOF membranes. A sound proof for the synergy between two porous materials is the fact that the COF-MOF composite membranes surpass the Robeson upper bound of polymer membranes for mixture separation of a H2/CO2 gas pair and are among the best gas separation MOF membranes reported thus far.