Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 24, Pages 7673-7680Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b03348
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Funding
- National Natural Science Foundation of China [21390394, 21261130584, 21471065]
- National Basic Research Program of China [2012CB821700]
- 111 project [B07016]
- Micro-Green project [ANR-12-IS08-0001-01]
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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 H-2/CO, 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 H-2/CO2 gas pair and are among the best gas separation MOF membranes reported thus far.
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