▎ 摘　　要

NOVELTY - Method for preparing sheet-layered three-phase composite photocatalytic material, involves (a) taking the 2.5 g/l graphene dispersion prepared by ultrasonic stripping and the 5 mM dipotassium hexachloroplatinate solution that has been ultrasonicated for 30 minutes previously and uniformly mixing, (b) dripping a 200 mM sodium borohydride solution of the same volume as the dipotassium hexachloroplatinate solution and reacting to prepare a graphene/nano platinum composite material, (c) adding sodium lignosulfonate to distilled water, stirring in an ice water bath for 10 minutes to obtain a sodium lignosulfonate solution, after dispersing the graphene/nanoplatinum composite material prepared in step (b) in the sodium lignosulfonate solution, dripping pyrrole and 0.2892 M ferric chloride solution, filtering, washing and drying under the conditions of ice-water bath while stirring while reacting to obtain the graphene/nano platinum/polypyrrole three-phase composite photocatalytic material. USE - Method for preparing sheet-layered three-phase composite photocatalytic material. ADVANTAGE - The layered three-phase composite photocatalytic material prepared by the method has high visible light trapping ability, separation of electrons and holes, high transmission effect, and high photocatalytic degradation performance under the condition of light irradiation.