The effects of formation and functionalization of graphene-based membranes on their gas and water vapor permeation properties

0577606 - ÚACH 2024 RIV NL eng J - Článek v odborném periodiku
Smržová, Darina - Šrámová Slušná, Michaela - Peter, Jakub - Beneš, Hynek - Tolasz, Jakub - Pop-Georgievski, Ognen - Maříková, Monika - Ecorchard, Petra
The effects of formation and functionalization of graphene-based membranes on their gas and water vapor permeation properties.
Heliyon. Roč. 9, č. 11 (2023), č. článku e21417. ISSN 2405-8440. E-ISSN 2405-8440
Grant CEP: GA ČR(CZ) GA22-05244S; GA MŠMT(CZ) LM2023066
Institucionální podpora: RVO:61388980 ; RVO:61389013
Klíčová slova: Carboxylated graphene oxide * Gas permeability * Graphene oxide * Graphene-based membrane
Obor OECD: Inorganic and nuclear chemistry; Polymer science (UMCH-V)
Impakt faktor: 4, rok: 2022
Způsob publikování: Open access

The gas and water vapor permeabilities of graphene-based membranes can be affected by the presence of different functional groups directly bound to the graphene network. In this work, one type of carboxylated graphene oxide (GO-COOH) and two types of graphene oxide synthesized i) under strong oxidative conditions directly from graphite (GO-1) and ii) under mild oxidative conditions from exfoliated graphene (GO-2) were used as precursors of self-standing membranes prepared with thicknesses in the range of 12–55 μm via slow-vacuum filtration preparation method. It was observed that the permeabilities for all tested gases decreased in order GO-2 > GO-1 > GO-COOH and depended on both the arrangement of graphene sheets and their functionalization. The GO-1 membrane with a high content of oxygen-containing groups showed the best performance for water vapor permeability. The GO-2 membrane with a thickness of 43 μm exhibited a disordered GO sheet morphology and, therefore, unique gas-separation performance towards H2/CO2 gas pair, showing high hydrogen permeability while keeping extremely high H2/CO2 ideal selectivity that exceeds the Robeson 2008 upper bound of polymer membranes.
Trvalý link: https://hdl.handle.net/11104/0346728