Details
| Original language | English |
|---|---|
| Pages (from-to) | 10094-10098 |
| Number of pages | 5 |
| Journal | Journal of the American Chemical Society |
| Volume | 140 |
| Issue number | 32 |
| Early online date | 18 Jul 2018 |
| Publication status | Published - 15 Aug 2018 |
Abstract
Covalent organic frameworks (COFs) have been proposed as alternative candidates for molecular sieving membranes due to their chemical stability. However, developing COF membranes with narrowed apertures close to the size of common gas molecules is a crucial task for selective gas separation. Herein, we demonstrate a new type of a two-dimensional layered-stacking COF-COF composite membrane in bilayer geometry synthesized on a porous support by successively regulating the growth of imine-based COF-LZU1 and azine-based ACOF-1 layers via a temperature-swing solvothermal approach. The resultant COF-LZU1-ACOF-1 bilayer membrane has much higher separation selectivity for H2/CO2, H2/N2, and H2/CH4 gas mixtures than the individual COF-LZU1 and ACOF-1 membranes due to the formation of interlaced pore networks, and the overall performance surpasses the Robeson upper bounds. The COF-LZU1-ACOF-1 bilayer membrane also shows high thermal and long-time stabilities.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Chemical Engineering(all)
- Colloid and Surface Chemistry
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In: Journal of the American Chemical Society, Vol. 140, No. 32, 15.08.2018, p. 10094-10098.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Covalent Organic Framework-Covalent Organic Framework Bilayer Membranes for Highly Selective Gas Separation
AU - Fan, Hongwei
AU - Mundstock, Alexander
AU - Feldhoff, Armin
AU - Knebel, Alexander
AU - Gu, Jiahui
AU - Meng, Hong
AU - Caro, Jürgen
N1 - Publisher Copyright: © 2018 American Chemical Society. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/8/15
Y1 - 2018/8/15
N2 - Covalent organic frameworks (COFs) have been proposed as alternative candidates for molecular sieving membranes due to their chemical stability. However, developing COF membranes with narrowed apertures close to the size of common gas molecules is a crucial task for selective gas separation. Herein, we demonstrate a new type of a two-dimensional layered-stacking COF-COF composite membrane in bilayer geometry synthesized on a porous support by successively regulating the growth of imine-based COF-LZU1 and azine-based ACOF-1 layers via a temperature-swing solvothermal approach. The resultant COF-LZU1-ACOF-1 bilayer membrane has much higher separation selectivity for H2/CO2, H2/N2, and H2/CH4 gas mixtures than the individual COF-LZU1 and ACOF-1 membranes due to the formation of interlaced pore networks, and the overall performance surpasses the Robeson upper bounds. The COF-LZU1-ACOF-1 bilayer membrane also shows high thermal and long-time stabilities.
AB - Covalent organic frameworks (COFs) have been proposed as alternative candidates for molecular sieving membranes due to their chemical stability. However, developing COF membranes with narrowed apertures close to the size of common gas molecules is a crucial task for selective gas separation. Herein, we demonstrate a new type of a two-dimensional layered-stacking COF-COF composite membrane in bilayer geometry synthesized on a porous support by successively regulating the growth of imine-based COF-LZU1 and azine-based ACOF-1 layers via a temperature-swing solvothermal approach. The resultant COF-LZU1-ACOF-1 bilayer membrane has much higher separation selectivity for H2/CO2, H2/N2, and H2/CH4 gas mixtures than the individual COF-LZU1 and ACOF-1 membranes due to the formation of interlaced pore networks, and the overall performance surpasses the Robeson upper bounds. The COF-LZU1-ACOF-1 bilayer membrane also shows high thermal and long-time stabilities.
UR - http://www.scopus.com/inward/record.url?scp=85050347993&partnerID=8YFLogxK
U2 - 10.1021/jacs.8b05136
DO - 10.1021/jacs.8b05136
M3 - Article
C2 - 30021065
AN - SCOPUS:85050347993
VL - 140
SP - 10094
EP - 10098
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 32
ER -