Recent progress in gas separation using functionalized graphene nanopores and nanoporous graphene oxide membranesF. Malekian, H. Ghafourian, K. Zare, A. A. Sharif and Y. ZamaniEur. Phys. J. Plus, 134 5 (2019) 212DOI: https://doi.org/10.1140/epjp/i2019-12612-4