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Title: Pressure-responsive two-dimensional metal-organic framework composite membranes for CO2 separation
Authors: Ying, Yunpan
Zhang, Zhengqing
Peh, Shing Bo
Karmakar, Avishek
Cheng, Youdong
Zhang, Jian
Xi, Lifei
Boothroyd, Chris
Lam, Yeng Ming
Zhong, Chongli
Zhao, Dan
Keywords: Science
Issue Date: 2021
Source: Ying, Y., Zhang, Z., Peh, S. B., Karmakar, A., Cheng, Y., Zhang, J., Xi, L., Boothroyd, C., Lam, Y. M., Zhong, C. & Zhao, D. (2021). Pressure-responsive two-dimensional metal-organic framework composite membranes for CO2 separation. Angewandte Chemie International Edition, 133(20), 11419-11426.
Journal: Angewandte Chemie International Edition
Abstract: The regulation of permeance and selectivity in membrane systems may allow effective relief of conventional energy-intensive separations. Here, pressure-responsive ultrathin membranes (≈100 nm) fabricated by compositing flexible two-dimensional metal-organic framework nanosheets (MONs) with graphene oxide nanosheets for CO2 separation are reported. By controlling the gas permeation direction to leverage the pressure-responsive phase transition of the MONs, CO2 -induced gate opening and closing behaviors are observed in the resultant membranes, which are accompanied with the sharp increase of CO2 permeance (from 173.8 to 1144 gas permeation units) as well as CO2 /N2 and CO2 /CH4 selectivities (from 4.1 to 22.8 and from 4 to 19.6, respectively). The flexible behaviors and separation mechanism are further elucidated by molecular dynamics simulations. This work establishes the relevance of structural transformation-based framework dynamics chemistry in smart membrane systems.
ISSN: 1433-7851
DOI: 10.1002/anie.202017089
Rights: © 2021 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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