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Stability and dye inclusion of graphene oxide/polyelectrolyte layer-by-layer self-assembled films in saline, acidic and basic aqueous solutions
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2017 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 111, 350-357 p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate that a simple spectrophotometric method can be efficiently applied for the characterization of structural and chemical stability and adsorption properties of composite graphene oxide (GO) films in various solutions. The immersion stability of GO layer-by-layer (LbL) self-assembled with a polycation into ultrathin multilayered films was studied in water and in concentrated salty, acidic and basic solutions by UV-visible spectroscopy. These films were found to retain both their chemical stability and physical integrity in water, salt and HCl solutions with a slight rearrangement of the nanoscale structure as shown by the change in their visible spectrum. However, immersion into NaOH solutions above molar concentration led to the deconstruction of the multilayer structure by base-induced deoxygenation of GO. The adsorption of methylene blue on polymer/GO LbL films of various thicknesses revealed that the multilayers are largely impermeable towards this cationic dye.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 111, 350-357 p.
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-129700DOI: 10.1016/j.carbon.2016.10.011ISI: 000389555500040OAI: oai:DiVA.org:umu-129700DiVA: diva2:1063671
Available from: 2017-01-10 Created: 2017-01-09 Last updated: 2017-01-10Bibliographically approved

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Talyzin, Alexandr
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Department of Physics
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CiteExportLink to record
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