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Ionic Liquid Selectively Facilitates CO2 Transport through Graphene Oxide Membrane
ACS Nano ( IF 15.8 ) Pub Date : 2018-06-06 00:00:00 , DOI: 10.1021/acsnano.8b00367 Wen Ying , Jingsong Cai , Ke Zhou 1 , Danke Chen , Yulong Ying , Yi Guo , Xueqian Kong , Zhiping Xu 1 , Xinsheng Peng
ACS Nano ( IF 15.8 ) Pub Date : 2018-06-06 00:00:00 , DOI: 10.1021/acsnano.8b00367 Wen Ying , Jingsong Cai , Ke Zhou 1 , Danke Chen , Yulong Ying , Yi Guo , Xueqian Kong , Zhiping Xu 1 , Xinsheng Peng
Affiliation
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Membrane separation of CO2 from H2, N2, or CH4 has economic benefits. However, the trade-off between selectivity and permanence in membrane separation is challenging. Here, we prepared a high-performance CO2-philic membrane by confining the [BMIM][BF4] ionic liquid to the nanochannels in a laminated graphene oxide membrane. Nanoconfinement causes the [BMIM][BF4] cations and anions to stratify. The layered anions facilitate CO2 transportation with a permeance of 68.5 GPU. The CO2/H2, CO2/CH4, and CO2/N2 selectivities are 24, 234, and 382, respectively, which are up to 7 times higher than that of GO-based membranes and superior to the 2008 Robeson upper bound. Additionally, the resultant membrane has a high-temperature resistance, long-term durability, and high-pressure stability, indicating its great potential for CO2 separation applications. Nanoconfining an ionic liquid into the two-dimensional nanochannels of a laminated membrane is a promising gas separation method and a nice system for investigating ionic liquid behavior in nanoconfined environments.
中文翻译：
离子液体选择性地促进通过氧化石墨烯膜的CO 2传输
从H 2，N 2或CH 4膜分离CO 2具有经济利益。然而，膜分离的选择性和持久性之间的权衡是有挑战性的。在这里，我们通过将[BMIM] [BF 4 ]离子液体限制在层状氧化石墨烯膜的纳米通道中，制备了高性能的CO 2-亲液膜。纳米约束导致[BMIM] [BF 4 ]阳离子和阴离子分层。层状阴离子以68.5 GPU的渗透率促进了CO 2的运输。CO 2 / H 2，CO 2 / CH 4和CO 2 / N2个选择性分别为24、234和382，这比基于GO的膜高7倍，并且优于2008 Robeson上限。另外，所得膜具有耐高温性，长期耐久性和高压稳定性，表明其在CO 2分离应用中的巨大潜力。将离子液体纳米约束到层压膜的二维纳米通道中是一种很有前途的气体分离方法，也是研究纳米约束环境中离子液体行为的理想系统。
更新日期：2018-06-06
中文翻译：
离子液体选择性地促进通过氧化石墨烯膜的CO 2传输
从H 2，N 2或CH 4膜分离CO 2具有经济利益。然而，膜分离的选择性和持久性之间的权衡是有挑战性的。在这里，我们通过将[BMIM] [BF 4 ]离子液体限制在层状氧化石墨烯膜的纳米通道中，制备了高性能的CO 2-亲液膜。纳米约束导致[BMIM] [BF 4 ]阳离子和阴离子分层。层状阴离子以68.5 GPU的渗透率促进了CO 2的运输。CO 2 / H 2，CO 2 / CH 4和CO 2 / N2个选择性分别为24、234和382，这比基于GO的膜高7倍，并且优于2008 Robeson上限。另外，所得膜具有耐高温性，长期耐久性和高压稳定性，表明其在CO 2分离应用中的巨大潜力。将离子液体纳米约束到层压膜的二维纳米通道中是一种很有前途的气体分离方法，也是研究纳米约束环境中离子液体行为的理想系统。
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