Abstract
Few-layers graphene is prepared by one-step liquid-phase exfoliation with carbon quantum dots (CQDs) as exfoliating agents, which is prepared by a novel electrochemical interface technology. The morphology, structure and composition of CQDs and graphene, as well as the mechanism for the realization of large-scale preparation of CQDs and graphene was proposed. The results showed that CQDs with D50 size of 55.12 nm has excellent dispersion and exfoliation properties for graphite, and the graphene yield is as high as 97.25% (D50 size of 3.651 μm and 1–5 layers). Further, we successfully prepared graphene film, which has high electrical conductivity (3100.45 S/cm) and thermal conductivity (950.31 W/(m·K)) after graphitization.
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