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Chemically modified graphene sheets by functionalization of highly exfoliated graphite

Title
Chemically modified graphene sheets by functionalization of highly exfoliated graphite
Authors
Grayfer E.D.Nazarov A.S.Makotchenko V.G.Kim S.-J.Fedorov V.E.
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2011
Journal Title
Journal of Materials Chemistry
ISSN
0959-9428JCR Link
Citation
vol. 21, no. 10, pp. 3410 - 3414
Indexed
SCOPUS WOS scopus
Abstract
Highly exfoliated graphite (HEG) containing multi-, bi- and monolayer graphenes has been prepared from an alternative class of precursors - fluorinated graphite intercalation compounds, namely, poly(dicarbon fluoride) intercalation compounds C2F·xR. Treatment of HEG by mixture of concentrated nitric and sulfuric acids results in chemically modified graphenes (CMG) dispersible in water or alcohol medium without any surfactants or stabilizers. The samples were examined by elemental analysis, X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic force microscopy (AFM), IR, Raman and UV-vis spectroscopies. Elemental analysis and IR data indicate that covalent functionalization with oxygen-containing groups, such as carboxyl group, occurs upon acid treatment. AFM images show thin sheets of about 1 nm, confirming the well-dispersed state of the material. Dispersions of CMG sheets from highly exfoliated graphite are very stable colloids (over a year) and can serve for further functionalization. © 2011 The Royal Society of Chemistry.
DOI
10.1039/c0jm02469d
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자연과학대학 > 화학·나노과학전공 > Journal papers
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