METHOD OF PREPARING GRAPHENE-COATED ALUMINA AND GRAPHENE-COATED ALUMINA PREPARED USING THE METHOD

摘要

A method of preparing graphene-coated alumina, the method including: (1) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution at between 100 and 200° C. to yield a cyclized polyacrylonitrile solution; (2) heating the cyclized LPAN solution at between 200 and 300° C. to yield a thermally-oxidized polyacrylonitrile (OPAN) having a ladder structure; (3) mixing the thermally-oxidized polyacrylonitrile with an aluminum compound, to yield a mixture, and adding a solvent to the mixture, uniformly mixing, to yield a polyacrylonitrile-coated aluminum compound; (4) drying the polyacrylonitrile-coated aluminum compound until the solvent is evaporated, to yield a carbonized precursor-coated aluminum compound; and (5) calcining the carbonized precursor-coated aluminum compound in the presence of an inert gas flow, to yield graphene-coated alumina.