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Effective Separation of CO2 Using Metal-Incorporated rGO Membranes

Cited 63 time in Web of Science Cited 62 time in Scopus

Jin, Xiaoheng; Foller, Tobias; Wen, Xinyue; Ghasemian, Mohammad B.; Wang, Fei; Zhang, Mingwei; Bustamante, Heriberto; Sahajwalla, Veena; Kumar, Priyank; Kim, Hangyel; Lee, Gwan-Hyoung; Kalantar-Zadeh, Kourosh; Joshi, Rakesh

Issue Date
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Materials, Vol.32 No.17, p. 1907580
Graphene-based materials, primarily graphene oxide (GO), have shown excellent separation and purification characteristics. Precise molecular sieving is potentially possible using graphene oxide-based membranes, if the porosity can be matched with the kinetic diameters of the gas molecules, which is possible via the tuning of graphene oxide interlayer spacing to take advantage of gas species interactions with graphene oxide channels. Here, highly effective separation of gases from their mixtures by using uniquely tailored porosity in mildly reduced graphene oxide (rGO) based membranes is reported. The gas permeation experiments, adsorption measurement, and density functional theory calculations show that this membrane preparation method allows tuning the selectivity for targeted molecules via the intercalation of specific transition metal ions. In particular, rGO membranes intercalated with Fe ions that offer ordered porosity, show excellent reproducible N-2/CO2 selectivity of approximate to 97 at 110 mbar, which is an unprecedented value for graphene-based membranes. By exploring the impact of Fe intercalated rGO membranes, it is revealed that the increasing transmembrane pressure leads to a transition of N-2 diffusion mode from Maxwell-Stefan type to Knudsen type. This study will lead to new avenues for the applications of graphene for efficiently separating CO2 from N-2 and other gases.
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  • College of Engineering
  • Department of Materials Science & Engineering
Research Area 2D materials, 2차원 물질, Smiconductor process, semiconductor devices, 반도체 공정, 반도체 소자


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