期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 18, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/s11051-016-3503-1
关键词
Fluorographene; Supercritical CO2; Exfoliation; High productivity and low cost; Two-dimensional materials
资金
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20123219110010]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
This article presents a novel and simple method of supercritical fluid-phase exfoliation to fabricate fluorographene (FG) nanosheets with high yield and good quality. After soaking with supercritical CO2 and glycol at 10 MPa and 50 degrees C for 24 h, fluoride graphite powder was exfoliated by the intercalated CO2 and glycol molecules during an abrupt depressurization step. Here, supercritical CO2 acted as a penetrant and glycol acted as a molecular wedge to exfoliate fluoride graphite very well. The properties of FG nanosheets were detected by TEM, AFM, UV spectra, FTIR, XPS, Raman spectra, and XRD, which show the possibility of producing thickness-controlled FG nanosheets by varying numbers of supercritical CO2 process and the high yield of pure FG nanosheets of 32 wt%, four times higher than that of the sample treated only by the traditional method of sonication. Its simplicity, high productivity, low cost, and short processing time make this technique suitable for large-scale manufacturing of FG nanosheets.
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