Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.chemmater.5b04475
Title: Facile Preparation of Graphene Oxide Membranes for Gas Separation
Authors: Chi, Chenglong 
Wang, Xuerui 
Peng, Yongwu 
Qian, Yuhong 
Hu, Zhigang 
Dong, Jinqiao 
Zhao, Dan 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
MOLECULAR-SIEVING MEMBRANES
GRAPHITE OXIDE
HYDROGEN SEPARATION
ZEOLITE MEMBRANES
HIGH-SELECTIVITY
HIGH-FLUX
PERFORMANCE
NANOSHEETS
EXFOLIATION
FABRICATION
Issue Date: 10-May-2016
Publisher: AMER CHEMICAL SOC
Citation: Chi, Chenglong, Wang, Xuerui, Peng, Yongwu, Qian, Yuhong, Hu, Zhigang, Dong, Jinqiao, Zhao, Dan (2016-05-10). Facile Preparation of Graphene Oxide Membranes for Gas Separation. CHEMISTRY OF MATERIALS 28 (9) : 2921-2927. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.chemmater.5b04475
Abstract: © 2016 American Chemical Society. We herein report a facile preparation of graphene oxide (GO) membranes including three steps: (1) mild freeze-thaw exfoliation to get large GO nanosheets, (2) purification of exfoliated GO nanosheets through pH adjustment, and (3) spin coating to fabricate smooth GO membranes with uniformly aligned GO nanosheets. The fabricated GO membranes are subject to single gas permeation tests, with the obtained gas permeance in the order He > H2 ≫ CH4 > CO2 > N2 ≫ SF6, indicating a dominant molecular sieving separation mechanism. The H2/CO2 mixed gas permeation tests reveal H2 permeance up to 3.4 × 10-7 mol/(m2·s·Pa) and a H2/CO2 separation factor up to 240, which are among the best of all the reported membranes for H2/CO2 separation. The separation factor drops to 47 at a higher temperature of 120 °C, but the H2 permeance is further increased to 6.7 × 10-7 mol/(m2·s·Pa), ensuring a higher gas separation throughput under higher temperatures. This study paves the way toward large-scale production and application of GO membranes as promising gas separation materials.
Source Title: CHEMISTRY OF MATERIALS
URI: https://scholarbank.nus.edu.sg/handle/10635/170646
ISSN: 0897-4756
1520-5002
DOI: 10.1021/acs.chemmater.5b04475
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