▎ 摘　　要

NOVELTY - Preparation of two-dimensional sulfur-nitrogen doped graphene involves sieving hydrotalcite, adding sodium dodecyl benzene sulfonate solution, stirring and aging to obtain sodium dodecyl benzene sulfonate-modified talc suspension liquid; weighing acetone and 4-dimethylaminopyridine and adding sodium dodecyl benzene sulfonate-modified talc suspension liquid; stirring, precipitating, separating, washing precipitate with deionized water, drying, grinding and sieving to obtain modified hydrotalcite powder; and putting in vacuum tubular furnace, heating, vacuum sintering and cooling. USE - Method for preparing two-dimensional sulfur-nitrogen doped graphene (claimed). ADVANTAGE - The method has simple material and mild conditions. DETAILED DESCRIPTION - Preparation of two-dimensional sulfur-nitrogen doped graphene comprises: (A) weighing 0.5-1 mmol sodium dodecyl benzene sulfonate per 1 g hydrotalcite, sieving hydrotalcite by 20-50 mesh sieve, adding 0.1-1 wt.% sodium dodecyl benzene sulfonate solution, stirring at 60-70 degrees C for 5-6 hours in constant temperature water bath and aging for 12-24 hours to obtain sodium dodecyl benzene sulfonate-modified talc suspension liquid; (B) weighing 0.1-0.5 mmol acetone and 1-5 mmol 4-dimethylaminopyridine per 1 g hydrotalcite and adding sodium dodecyl benzene sulfonate-modified talc suspension liquid; (C) stirring at 60-70 degrees C for 6-8 hours in constant-temperature water bath, precipitating, separating, washing precipitate with deionized water for 2-3 times, drying, grinding and sieving 20-40 mesh sieve to obtain modified hydrotalcite powder; and (D) putting in vacuum tubular furnace, heating to 400-600 degrees C, vacuum sintering for 2-4 hours, cooling to room temperature, adding 5-10 mL of 20-40 wt.% hydrochloric acid solution, stirring for 3-4 hours under nitrogen protection, separating precipitate, drying, heating to 2000-2500 degrees C, treating for 3-6 hours and cooling.