Tuning of fluorine content in graphene: towards large-scale production of stoichiometric fluorographene

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The availability of well-defined modified graphene derivatives such as fluorographene, graphane, thiographene or hydroxygraphene is of pivotal importance for tuning the resulting material properties in numerous potential applications. A series of fluorinated graphene with various contents of fluorine was synthesized by a simple fluorination procedure in an autoclave with a nitrogen/fluorine atmosphere at different exposure times and temperatures. To investigate the composition, structure and properties all samples were characterized in detail by a number of analytical techniques such as SEM, XRD, EDS, AFM, STEM, combustible elemental analysis, STA, XPS, Raman spectroscopy, UV-VIS spectroscopy and cyclic voltammetry. The fully fluorinated graphene with the overall stoichiometry C<inf>1</inf>F<inf>1.05</inf> had a bright white color indicating a significant change of band-gap. In comparison to other samples such a high concentration of fluorine led to the occurrence of exotic thermal behavior, strong luminescence in the visible spectral region and also the unique super-hydrophobic behavior observed on the material surface. The described tunable fluorination should pave the way to fluorographene based devices with tailored properties.




Mazánek, V., Jankovský, O., Luxa, J., Sedmidubský, D., Janoušek, Z., Šembera, F., … Sofer, Z. (2015). Tuning of fluorine content in graphene: towards large-scale production of stoichiometric fluorographene. Nanoscale, 7(32), 13646–13655. https://doi.org/10.1039/c5nr03243a

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