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A MOF Glass Membrane for Gas Separation
Author(s) -
Wang Yuhan,
Jin Hua,
Ma Qiang,
Mo Kai,
Mao Haizhuo,
Feldhoff Armin,
Cao Xingzhong,
Li Yanshuo,
Pan Fusheng,
Jiang Zhongyi
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201915807
Subject(s) - membrane , crystallite , materials science , porous glass , porosity , chemical engineering , nanopore , vitrification , metal organic framework , gas separation , phase (matter) , quenching (fluorescence) , fabrication , ceramic , nanotechnology , chemistry , composite material , organic chemistry , metallurgy , adsorption , biochemistry , engineering , medicine , physics , alternative medicine , quantum mechanics , fluorescence , pathology , andrology
Metal–organic framework (MOF) glasses are promising candidates for membrane fabrication due to their significant porosity, the ease of processing, and most notably, the potential to eliminate the grain boundary that is unavoidable for polycrystalline MOF membranes. Herein, we developed a ZIF‐62 MOF glass membrane and exploited its intrinsic gas‐separation properties. The MOF glass membrane was fabricated by melt‐quenching treatment of an in situ solvothermally synthesized polycrystalline ZIF‐62 MOF membrane on a porous ceramic alumina support. The molten ZIF‐62 phase penetrated into the nanopores of the support and eliminated the formation of intercrystalline defects in the resultant glass membrane. The molecular sieving ability of the MOF membrane is remarkably enhanced via vitrification. The separation factors of the MOF glass membrane for H 2 /CH 4 , CO 2 /N 2 and CO 2 /CH 4 mixtures are 50.7, 34.5, and 36.6, respectively, far exceeding the Robeson upper bounds.