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Swelling of Thin Graphene Oxide Films Studied by in Situ Neutron Reflectivity
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
2018 (engelsk)Inngår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 122, nr 24, s. 13106-13116Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Permeation of multilayered graphene oxide (GO) membranes by polar solvents is known to correlate with their swelling properties and amount of sorbed solvent. However, quantitative estimation of sorption using standard (e.g., gravimetric) methods is technically challenging for few nanometers thick GO membranes/films exposed to solvent vapors. Neutron reflectivity (NR) was used here to evaluate the amount of solvents intercalated into the film which consists of only ∼31.5 layers of GO. Analysis of NR data recorded from the GO film exposed to vapors of polar solvents provides information about change of film thickness due to swelling, amount of intercalated solvent, and selectivity in sorption of solvents from binary mixtures. A quantitative study of GO film sorption was performed for D2O, d-methanol, ethanol, dimethyl sulfoxide (DMSO), acetonitrile, dimethylformamide (DMF), and acetone. Using isotopic contrast, we estimated selectivity in sorption of ethanol/d-methanol mixtures by the GO film. Estimation of sorption selectivity was also performed for D2O/DMF, D2O/DMSO, and D2O/acetonitrile binary mixtures. Sorption of polar solvents was compared for the thin GO film, micrometer thick free standing GO membranes, and graphite oxide powders.

sted, utgiver, år, opplag, sider
American Chemical Society (ACS), 2018. Vol. 122, nr 24, s. 13106-13116
Emneord [en]
graphene, graphene oxide, swelling
HSV kategori
Forskningsprogram
fysik
Identifikatorer
URN: urn:nbn:se:umu:diva-151273DOI: 10.1021/acs.jpcc.8b01616ISI: 000436381600057Scopus ID: 2-s2.0-85047617225OAI: oai:DiVA.org:umu-151273DiVA, id: diva2:1243455
Forskningsfinansiär
EU, Horizon 2020Tilgjengelig fra: 2018-08-31 Laget: 2018-08-31 Sist oppdatert: 2018-10-31bibliografisk kontrollert

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Klechikov, AlexeySun, JinhuaTalyzin, Aleksandr V.

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