▎ 摘　　要

NOVELTY - Preparation of barium titanate/graphene composite nanomaterial comprises dissolving tetrabutyl titanate in ethylene glycol monomethyl ether, dropping ammonia water as precipitator, precipitating to obtain titanium oxyhydroxide precipitate; adding precipitate, graphene oxide aqueous solution and ethylenediamine/ethanolamine mixed liquid into reaction kettle, stirring; dissolving barium acetate into deionized water, adding to mixture in reaction kettle in second step, adding potassium hydroxide, stirring; sealing, cooling, filtering, rinsing with deionized water, and drying. USE - Method for preparing barium titanate/graphene composite nanomaterial (claimed). ADVANTAGE - The method is simple, and easy to control, and has low cost and no pollution. The composite nanomaterial has high purity and good crystallinity. DETAILED DESCRIPTION - Preparation of barium titanate/graphene composite nanomaterial comprises dissolving 0.25-0.5 mmol tetrabutyl titanate in 5 ml ethylene glycol monomethyl ether, dropping 30% ammonia water as precipitator, precipitating to obtain titanium oxyhydroxide precipitate; adding precipitate, 1 ml 0.5-2 g/L graphene oxide aqueous solution and 20 ml ethylenediamine/ethanolamine mixed liquid into reaction kettle, stirring under room temperature for 6 hours; dissolving 0.25-0.5 mmol barium acetate into 2 ml deionized water, adding to mixture in reaction kettle in second step, adding 2.74-10.96 g potassium hydroxide, stirring at room temperature for 30 minutes; sealing, keeping temperature at 180-200 degrees C for 8-12 hours, naturally cooling to room temperature, taking out reaction product, filtering, rinsing with deionized water, and drying. The volume ratio of ethylenediamine and ethanolamine is 1:1. The reaction kettle is PTFE-lined stainless steel sealed reaction kettle.