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Hydration of graphite oxide in electrolyte and non-electrolyte solutions
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2011 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 115, no 50, 24611-24614 p.Article in journal (Refereed) Published
Abstract [en]

Pressure induced insertion of liquid media was studied for graphite oxide (GO) immersed in excess amounts of aqueous copper acetate and sucrose solutions and compared to previous experiments with GO immersed in solute-free water media. Compression of GO in copper acetate solution resulted in significant enhancement of high pressure anomaly compared to pure water: interlayer distance reached 17.4 Å at 2.3 GPa while for pure water the maximal observed layer separation was 13.08 Å. Compression of GO in sucrose solution was found to be very similar to compression in solute-free water. These results confirm that copper ions can be pressure-inserted into GO structure while the expansion of structure is attributed to osmotic swelling. Sucrose dissolves in water in molecular form (nonelectrolyte) which results in weaker absorption into the GO structure and the absence of osmotic swelling. Pressure induced insertion of various solutions into the GO structure could possibly be promising for synthesis of new graphite intercalation materials or graphene-related composites.

Place, publisher, year, edition, pages
Washington DC: American Chemical Society (ACS), 2011. Vol. 115, no 50, 24611-24614 p.
Keyword [en]
graphene graphite oxide
National Category
Physical Chemistry
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-50642DOI: 10.1021/jp2084023OAI: oai:DiVA.org:umu-50642DiVA: diva2:466850
Available from: 2011-12-16 Created: 2011-12-16 Last updated: 2017-12-08Bibliographically approved

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