▎ 摘　　要

NOVELTY - Preparing graphene-titanium dioxide micro-sphere comprises (i) placing graphite in mixed solution of concentrated sulfuric acid and potassium permanganate, stirring, washing, filtering, drying and placing in muffle furnace to obtain expanded graphite product, (ii) dissolving expanded graphite product in deionized water, adding surfactant, stirring, then adding titanium source, adding ammonia, stirring, subjecting into spray drying, placing resulting product in muffle furnace, reacting, washing with dilute acid or dilute alkali and deionized water, and then drying to obtain final product. USE - The method is useful for preparing graphene-titanium dioxide micro-sphere (claimed). DETAILED DESCRIPTION - Preparing graphene-titanium dioxide micro-sphere comprises (i) placing graphite in mixed solution of concentrated sulfuric acid and potassium permanganate, stirring at 20-60 degrees C for 0.5-5 hours, washing, filtering, drying and placing in a muffle furnace at 600-1200 degrees C for 0.1-6 hours under nitrogen gas atmosphere to obtain expanded graphite product, (ii) dissolving expanded graphite product obtained in step (i) in deionized water, adding 0.1-5 pts. wt. surfactant, stirring for 0.1-2 hours, then adding titanium source, where mass ratio between titanium source and expanded graphite precursor is 0.1-20:1, adding ammonia, stirring under ultrasonic for 0.5-4 hours, where molar ratio between ammonia and titanium source is 1-10:1, then stirring under ultrasonic for 0.5-4 hours, subjecting resulting mixed solution into spray drying, placing resulting product in muffle furnace protected by special atmosphere, treating at 600-1200 degrees C for 0.1-6 hours, washing the product with dilute acid or dilute alkali and deionized water, and then drying in vacuum drying oven for 0.5-8 hours to obtain final product.