▎ 摘　　要

NOVELTY - Preparing graphene-based photocatalyst material involves adding lanthanum chloride into anhydrous ethanol, adding titanium source and stirring to obtain solution. The solution is added into the reactor and aeration reaction is carried out for 2-5 hours. the reaction mixture is sealed and reacted for 10-15 hours. The reaction mixture is naturally cooled and filtered to obtain mixed precipitate. The mixed precipitate is mixed with dispersant and graphene powder, and ultrasonically dispersed for 2 to 4 hours. USE - Method for preparing graphene-based photocatalyst (claimed). ADVANTAGE - The method enables to prepare graphene-based photocatalyst material which has reduced the defect of graphene, increased the graphene and perovskite nano material absorption efficiency. DETAILED DESCRIPTION - Preparing graphene-based photocatalyst material involves adding lanthanum chloride into anhydrous ethanol, adding titanium source and stirring to obtain solution. The solution is added into the reactor and aeration reaction is carried out for 2-5 hours. the reaction mixture is sealed and reacted for 10-15 hours. The reaction mixture is naturally cooled and filtered to obtain mixed precipitate. The mixed precipitate is mixed with dispersant and graphene powder, and ultrasonically dispersed for 2 to 4 hours to obtain dispersion precursor. The dispersion precursor is placed in the photoreactor and reacted for 2 to 5 hours and filtered to obtain desired product.