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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201900855
|2 doi
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|a pubmed24n0990.xml
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|a DE-627
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|a eng
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|a Babu, Deepu J
|e verfasserin
|4 aut
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| 245 |
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|a Restricting Lattice Flexibility in Polycrystalline Metal-Organic Framework Membranes for Carbon Capture
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Although polycrystalline metal-organic framework (MOF) membranes offer several advantages over other nanoporous membranes, thus far they have not yielded good CO2 separation performance, crucial for energy-efficient carbon capture. ZIF-8, one of the most popular MOFs, has a crystallographically determined pore aperture of 0.34 nm, ideal for CO2 /N2 and CO2 /CH4 separation; however, its flexible lattice restricts the corresponding separation selectivities to below 5. A novel postsynthetic rapid heat treatment (RHT), implemented in a few seconds at 360 °C, which drastically improves the carbon capture performance of the ZIF-8 membranes, is reported. Lattice stiffening is confirmed by the appearance of a temperature-activated transport, attributed to a stronger interaction of gas molecules with the pore aperture, with activation energy increasing with the molecular size (CH4 > CO2 > H2 ). Unprecedented CO2 /CH4 , CO2 /N2 , and H2 /CH4 selectivities exceeding 30, 30, and 175, respectively, and complete blockage of C3 H6 , are achieved. Spectroscopic and X-ray diffraction studies confirm that while the coordination environment and crystallinity are unaffected, lattice distortion and strain are incorporated in the ZIF-8 lattice, increasing the lattice stiffness. Overall, RHT treatment is a facile and versatile technique that can vastly improve the gas-separation performance of the MOF membranes
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|a Journal Article
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|a CO2 capture
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|a defect engineering
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4 |
|a lattice flexibility
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|a metal-organic frameworks
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4 |
|a molecular sieving
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1 |
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|a He, Guangwei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hao, Jian
|e verfasserin
|4 aut
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1 |
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|a Vahdat, Mohammad Tohidi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Schouwink, Pascal Alexander
|e verfasserin
|4 aut
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|a Mensi, Mounir
|e verfasserin
|4 aut
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| 700 |
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|a Agrawal, Kumar Varoon
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 31(2019), 28 vom: 22. Juli, Seite e1900855
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:31
|g year:2019
|g number:28
|g day:22
|g month:07
|g pages:e1900855
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|u http://dx.doi.org/10.1002/adma.201900855
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