▎ 摘　　要

NOVELTY - A persimmon tannin-graphene-platinum composite material preparing method involves placing the graphene oxide powder in ultrapure water and dispersing the graphene oxide powder into a graphene oxide solution by using a crusher. Graphene solution is taken, persimmon tannin is added and making it uniform by ultrasonic to make persimmon tannin-graphene suspension. Chloroplatinic acid solution is added into persimmon tannin-graphene suspension followed by adding ascorbic acid for stirring, centrifuging, after drying to give a black precipitate. USE - Method for preparing persimmon tannin-graphene-platinum composite material for detecting hydrogen peroxide (claimed). ADVANTAGE - The method enables preparing persimmon tannin-graphene-platinum composite material with good stability, high specificity, in simple, convenient and quick manner. DETAILED DESCRIPTION - A persimmon tannin-graphene-platinum composite material preparing method involves placing the graphene oxide powder in ultrapure water and dispersing the graphene oxide powder into a graphene oxide solution by using a crusher. Graphene solution is taken, persimmon tannin is added and making it uniform by ultrasonic to make persimmon tannin-graphene suspension. Chloroplatinic acid solution is added into persimmon tannin-graphene suspension followed by adding ascorbic acid for stirring, centrifuging the stirred solution under centrifugation to remove the supernatant, washing the remaining black precipitate with double distilled water, centrifuging for 3 times, after drying to give a black precipitate, that is persimmon tannin - graphene- platinum nanocomposites. An INDEPENDENT CLAIM is also included for a method for detecting hydrogen peroxide by using persimmon tannin-graphene-platinum composite material.