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Swelling of Thin Graphene Oxide Films Studied by in Situ Neutron Reflectivity
Umea Univ, Dept Phys, SE-90187 Umea, Sweden.
Umea Univ, Dept Phys, SE-90187 Umea, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Umea Univ, Dept Phys, SE-90187 Umea, Sweden.
2018 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 122, no 24, p. 13106-13116Article in journal (Refereed) 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 similar to 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.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 122, no 24, p. 13106-13116
National Category
Physical Chemistry Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-360014DOI: 10.1021/acs.jpcc.8b01616ISI: 000436381600057OAI: oai:DiVA.org:uu-360014DiVA, id: diva2:1247814
Funder
EU, Horizon 2020, 696656Available from: 2018-09-13 Created: 2018-09-13 Last updated: 2018-09-13Bibliographically approved

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Vorobiev, Alexei

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