Mass Transport via In-Plane Nanopores in Graphene Oxide MembranesClick to copy article linkArticle link copied!
- Tobias FollerTobias FollerSchool of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaMore by Tobias Foller
- Lukas MadaußLukas MadaußFaculty for Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, GermanyMore by Lukas Madauß
- Dali JiDali JiSchool of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaMore by Dali Ji
- Xiaojun RenXiaojun RenSchool of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaMore by Xiaojun Ren
- K. Kanishka H. De SilvaK. Kanishka H. De SilvaSurface Science Laboratory, Toyota Technological Institute, Nagoya 468-8511, JapanMore by K. Kanishka H. De Silva
- Tiziana MussoTiziana MussoSchool of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaMore by Tiziana Musso
- Masamichi YoshimuraMasamichi YoshimuraSurface Science Laboratory, Toyota Technological Institute, Nagoya 468-8511, JapanMore by Masamichi Yoshimura
- Henning LebiusHenning LebiusNormandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14032 Caen, FranceMore by Henning Lebius
- Abdenacer BenyagoubAbdenacer BenyagoubNormandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14032 Caen, FranceMore by Abdenacer Benyagoub
- Priyank V. KumarPriyank V. KumarSchool of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaMore by Priyank V. Kumar
- Marika Schleberger*Marika Schleberger*Email for M.S.: [email protected]Faculty for Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, GermanyMore by Marika Schleberger
- Rakesh Joshi*Rakesh Joshi*Email for R.J.: [email protected]School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, AustraliaMore by Rakesh Joshi
Abstract
Angstrom-confined solvents in 2D laminates can travel through interlayer spacings, through gaps between adjacent sheets, and via in-plane pores. Among these, experimental access to investigate the mass transport through in-plane pores is lacking. Our experiments allow an understanding of this mass transport via the controlled variation of oxygen functionalities, size and density of in-plane pores in graphene oxide membranes. Contrary to expectations, our transport experiments show that higher in-plane pore densities may not necessarily lead to higher water permeability. We observed that membranes with a high in-plane pore density but a low amount of oxygen functionalities exhibit a complete blockage of water. However, when water–ethanol mixtures with a weaker hydrogen network are used, these membranes show an enhanced permeation. Our combined experimental and computational results suggest that the transport mechanism is governed by the attraction of the solvents toward the pores with functional groups and hindered by the strong hydrogen network of water formed under angstrom confinement.
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