| 摘要 |
A method for preparing graphene, comprising the steps of adding a surfactant to a carbonate solvent, and making up a surfactant-containing solution, wherein the surfactant is selected from at least one of tetramethylammonium hydrogen carbonate, tetraethylammonium hydrogen carbonate, tetrabutylammonium hydrogen carbonate, dodecyltetramethyl guanidine carbonate and hexadecyltetramethyl guanidine carbonate; adding graphite to the surfactant-containing solution, and performing ultrasonic peeling followed by centrifugation, to obtain a graphene-containing supernatant; keeping the graphene-containing supernatant at a temperature of 80°C - 100°C for 0.5 h - 1 h, then filtering and drying to obtain a graphene powder crude product; and keeping the graphene powder crude product at a temperature of 200°C - 300°C for 0.5 h - 1 h in a protective gas atmosphere to obtain a graphene powder. The method can prevent a residue of surfactant and solvent on the graphene, and reduce the residue of peeling aid and solvent, and the graphene sheet dimension is 3 µm - 50 µm, which is relatively large. |
