▎ 摘　　要

NOVELTY - Method for preparing photocatalytic material, involves (a) dispersing barium-lanthanum-titanium-oxide complex (I) powder in a mixed solvent of methanol and water to obtain photocatalyst suspension, (b) preparing a chloroplatinic acid aqueous solution, and adding the prepared aqueous solution to a pre-prepared graphene oxide aqueous phase suspension without stirring, (c) dripping an alkaline solution to the obtained suspension under vigorous stirring, adjusting the pH of the solution, washing the obtained precipitate with deionized water and centrifuging, (d) re-dispersing the obtained precipitate in photocatalyst suspension, continuously stirring, purging in nitrogen, and placing the precipitate under xenon lamp for irradiation, (e) preparing a bismuth salt aqueous solution, and adding the aqueous solution to the suspension obtained in step (d), and (f) placing the suspension obtained in step (e) under xenon lamp for irradiation, precipitating, centrifuging, washing, and vacuum drying. USE - The method is used for preparing photocatalytic material (claimed). ADVANTAGE - The method exhibits controllable experimental condition, has strong practicability, excellent reproducibility and easily available raw materials, and is mild environmentally-friendly and economical, and the obtained photocatalytic material is beneficial for extracting photo-generated electrons from photocatalyst interface, and reduces the charge recombination rate. DETAILED DESCRIPTION - Method for preparing photocatalytic material, involves (a) dispersing barium-lanthanum-titanium-oxide complex of formula (I): BaLa4Ti4O15 powder in a mixed solvent of methanol and water to obtain a photocatalyst suspension, (b) preparing a chloroplatinic acid aqueous solution, and adding the prepared aqueous solution to a pre-prepared graphene oxide aqueous phase suspension without stirring, (c) dripping an alkaline solution to the obtained suspension under vigorous stirring, adjusting the pH of the solution, washing the obtained precipitate with deionized water to neutral, and centrifuging for recovery, (d) re-dispersing the obtained precipitate to photocatalyst suspension, continuously stirring, purging in nitrogen, and placing the precipitate under xenon lamp for irradiation, (e) preparing a bismuth salt aqueous solution, and adding the aqueous solution to the suspension obtained in step (d), and (f) placing the suspension obtained in step (e) under xenon lamp for irradiation, precipitating, centrifuging, washing, and vacuum drying treatment to obtain the photocatalytic material, which is attached with bismuth trioxide-based co-catalyst.