An efficient method of producing stable graphene suspensions with less toxicity using dimethyl ketoxime

A highly stable graphene suspension has been prepared using dimethyl ketoxime (DMKO) as reductant. Nitrogen was doped into the graphene plane at the same time as the graphene oxide (GO) sheets were reduced. X-ray photoelectron spectroscopy indicated that the C/O ratio of graphene was significantly i...

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Bibliographic Details
Published in:Carbon (New York) 2012-12, Vol.50 (15), p.5351-5358
Main Authors: Su, Peng, Guo, Hui-Lin, Tian, Lei, Ning, Sheng-Ke
Format: Article
Language:English
Subjects:
Carbon
Chemical reactions
Cross-disciplinary physics: materials science
rheology
Dimethyl
Electrical resistivity
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Graphene
Materials science
Oxides
Physics
Resistivity
Specific materials
Toxicity
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Summary:A highly stable graphene suspension has been prepared using dimethyl ketoxime (DMKO) as reductant. Nitrogen was doped into the graphene plane at the same time as the graphene oxide (GO) sheets were reduced. X-ray photoelectron spectroscopy indicated that the C/O ratio of graphene was significantly increased after GO was treated with DMKO and the quantity of nitrogen incorporated into the graphene lattice was 3.67at.%. The electrical conductivity of the graphene paper was found to be ∼102Sm−1, which was 5 orders of magnitude better than that of GO, and this demonstrated the effective chemical reduction of GO. The mechanism of the chemical reaction of GO with DMKO was also discussed. The as-produced graphene material showed good capacitive behavior and long cycle life with a specific capacitance of ∼140Fg−1.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.07.001