▎ 摘　　要

NOVELTY - Graphene microsphere, is claimed. The preparation of graphene microsphere comprises (i) adding graphite into a mixed solution consisting of concentrated sulfuric acid and potassium permanganate, and ultrasonically stirring at 20-60 degrees C for 0.5-5 hours, washing the resulting product, filtering and drying, in a muffle furnace, treating in a nitrogen atmosphere at 600-1200 degrees C for 0.1-6 hours to obtain expanded graphite products; (ii) dissolving the expanded graphite in deionized water, adding 0.1-5 wt.% surfactant, ultrasonically stirring, gradually adding into titanium source solution; ultrasonically stirring for 0.5-4 hours, adding ammonia water, ultrasonically stirring, spray-drying the resulting mixture solution, placing the resulting product in a muffle furnace protected by a special atmosphere, treating, washing the resulting product with dilute acid or alkali and deionized aqueous solution for many times, vacuum drying in a vacuum drying oven. USE - Used as graphene microsphere. DETAILED DESCRIPTION - Graphene microsphere, is claimed. The preparation of graphene comprises (i) adding graphite into a mixed solution consisting of concentrated sulfuric acid and potassium permanganate, and ultrasonically stirring at 20-60 degrees C for 0.5-5 hours, washing the resulting product, filtering and drying, in a muffle furnace, treating in a nitrogen atmosphere at 600-1200 degrees C for 0.1-6 hours to obtain expanded graphite products; (ii) dissolving the expanded graphite in deionized water, adding 0.1-5 wt.% surfactant, ultrasonically stirring for 0.1-2 hours, gradually adding into titanium source solution, where the mass ratio of the titanium source to the expanded graphite precursor is 0.1-20:1; ultrasonically stirring for 0.5-4 hours, adding ammonia water, where the molar ratio of the ammonia water to the titanium source is 1-10:1, ultrasonically stirring for 0.5-4 hours, spray-drying the resulting mixture solution, placing the resulting product in a muffle furnace protected by a special atmosphere, treating at 600-1200 degrees C for 0.1-6 hours, washing the resulting product with dilute acid or alkali and deionized aqueous solution for many times, vacuum drying in a vacuum drying oven for 0.5-8 hours.