With different size of 0.10、0.15、0.18、0.30 mm of natural graphiteas raw material,graphite oxide(GO)and graphene with a size of 10~20 μm were prepared by pressurized oxidation, ammonia-hydrazine-based multiplex reduction through two different temperature stages. The reaction conditions were optimized by orthogonal test and single factor test. The Fourier transform infrared spectroscopy, Raman spectrometer, thermal stability of the GO and graphene were investigated. Morphology, structure and layer thickness of GO and graphene were investigated by Scanning electron microscopy, X-ray diffraction photometer, atomic force spectroscopy. Results show that GO yield, sheet peeling degree and thermal stability are improved with the decreasing graphite size. The residue yields of the prepared graphene at 800 ℃ are all above 80%, and it presents a thickness of about 1.0 nm. The study provides a practical method for the preparation of GO and graphene with large size.
CHANG Ran
,
PANG Xiuyan
,
LI Zejiang
,
XIN Yaping
. Preparation and characterization of large size graphite oxide and graphene[J]. Journal of Hebei University(Natural Science Edition), 2020
, 40(3)
: 260
-268
.
DOI: 10.3969/j.issn.1000-1565.2020.03.006
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