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

0447781 - ÚOCHB 2016 RIV GB eng J - Journal Article
Mazánek, V. - Jankovský, O. - Luxa, J. - Sedmidubský, D. - Janoušek, Zbyněk - Šembera, Filip - Mikulics, M. - Sofer, Z.
Tuning of fluorine content in graphene: towards large-scale production of stoichiometric fluorographene.
Nanoscale. Roč. 7, č. 32 (2015), s. 13646-13655. ISSN 2040-3364. E-ISSN 2040-3372
R&D Projects: GA ČR(CZ) GA15-09001S
Institutional support: RVO:61388963
Keywords : graphite oxide * doped graphene * reduction
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 7.760, year: 2015
http://pubs.rsc.org/en/content/articlepdf/2015/nr/c5nr03243a

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 C1F1.05 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.
Permanent Link: http://hdl.handle.net/11104/0249526