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Graphene Oxide Membranes with Heterogeneous Nanodomains for Efficient CO 2 Separations
Author(s) -
Wang Shaofei,
Xie Yu,
He Guangwei,
Xin Qingping,
Zhang Jinhui,
Yang Leixin,
Li Yifan,
Wu Hong,
Zhang Yuzhong,
Guiver Michael D.,
Jiang Zhongyi
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201708048
Subject(s) - permeance , membrane , selectivity , graphene , oxide , chemical engineering , stacking , chemistry , ethylene glycol , materials science , nanotechnology , organic chemistry , catalysis , biochemistry , engineering
Achieving high membrane performance in terms of gas permeance and carbon dioxide selectivity is an important target in carbon capture. Aiming to manipulate the channel affinity towards CO 2 to implement efficient separations, gas separation membranes containing CO 2 ‐philic and non‐CO 2 ‐philic nanodomains in the interlayer channels of graphene oxide (GO) were formed by intercalating poly(ethylene glycol) diamines (PEGDA). PEGDA reacts with epoxy groups on the GO surface, constructing CO 2 ‐philic nanodomains and rendering a high sorption capacity, whereas unreacted GO surfaces give non‐CO 2 ‐philic nanodomains, rendering low‐friction diffusion. Owing to the orderly stacking of nanochannels through cross‐linking and the heterogeneous nanodomains with moderate CO 2 affinity, a GO‐PEGDA500 membrane exhibits a high CO 2 permeance of 175.5 GPU and a CO 2 /CH 4 selectivity of 69.5, which is the highest performance reported for dry‐state GO‐stacking membranes.