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Microwave-assisted liquid phase exfoliation of graphite fluoride into fluorographene.
- Source :
-
Chemical Engineering Journal . Mar2019, Vol. 360, p673-679. 7p. - Publication Year :
- 2019
-
Abstract
- Graphical abstract Highlights • High-quality fluorographene nanosheets are fabricated by microwave-assisted liquid phase exfoliation. • The as-prepared fluorographene nanosheets are comprised of no more than four monolayers. • No other side reaction and impurity elements are introduced during the exfoliation process. • Fluorographene nanosheets exhibit excellent thermal stability and remarkable lubrication behavior in oil. Abstract Fluorographene (FG), as an important class of graphene derivatives, has shown great promise in high-performance devices and lubricating materials. However, the large-scale fabrication of high-quality and impurity-free FG nanosheets still remains a main challenge. Herein, a simple liquid-phase exfoliation approach to prepare thin FG nanosheets through the preliminary intercalation of raw graphite fluoride (GrF) particles by N,N-dimethyl formamide molecules, followed by a short-time microwave treatment is reported. Atom force microscopy measurements demonstrate that as-prepared FG nanosheets are comprised of no more than four monolayers after the microwave irradiation. After exfoliation, a small amount of aromatic C C groups in the FG nanosheets are restored, which slightly lowers the F content in FG as compared with the raw GrF. Besides, no other side reaction and impurity elements are introduced during the exfoliation process as revealed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The resultant high-quality FG nanosheets exhibit excellent thermal stability and remarkable lubrication behavior in oil, and thus can be used as a new class of graphene derivatives with the capability of large-scale fabrication for the future device and various other applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 360
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 134774379
- Full Text :
- https://doi.org/10.1016/j.cej.2018.12.044