▎ 摘　　要

NOVELTY - Preparation of graphene-doped graphene sheet involves mixing bentonite and dioctadecyldimethylammonium bromide solution, stirring, aging to obtain dioctadecyldimethylammonium bromide-modified bentonite suspension, adding dimethylsulfoxide and n-butyl phosphate to the obtained suspension, stirring to obtain a precipitate, separating the precipitate from liquid, grinding to obtain modified bentonite powder, calcining, cooling, adding calcined powder to hydrofluoric acid solution, precipitating, drying and heat-treating. USE - Preparation of sulfur-phosphorus-doped graphene sheet (claimed). ADVANTAGE - The method enables simple preparation of graphene-doped graphene sheet under mild reaction conditions. DETAILED DESCRIPTION - Preparation of graphene-doped graphene sheet involves mixing bentonite having size of 20-50 mesh and 0.1-1 %mass dioctadecyldimethylammonium bromide solution, stirring at 60-70 degrees C for 5-6 hours, aging for 12-24 hours to obtain dioctadecyldimethylammonium bromide-modified bentonite suspension, adding dimethylsulfoxide and n-butyl phosphate to the obtained dioctadecyldimethylammonium bromide-modified bentonite suspension, stirring at 60-70 degrees C for 6-8 hours to obtain a precipitate, separating the precipitate from liquid, washing with deionized water 2-3 times, drying, grinding to 20-40 mesh to obtain modified bentonite powder, placing in vacuum furnace, calcining at 400-00 degrees C for 2-4 hours, cooling to room temperature, adding calcined powder to 20-40 %mass hydrofluoric acid solution, stirring for 3-4 hours under nitrogen gas atmosphere, precipitating, drying, and heat-treating at 2000-2500 degrees C for 3-6 hours. The content of dioctadecyldimethylammonium bromide with respect to 1 g bentonite is 0.1-0.5 mmol. The content of dimethylsulfoxide and n-butyl phosphate with respect to 1 g bentonite is 1-5 mmol and 1-5 mmol, respectively. The content of hydrofluoric acid solution with respect to 1 g calcined powder is 5-10 ml.