▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped carbonized bacterial cellulose/graphene/platinum composite nano-material, involves performing high-speed homogenization of pure flocculant bacterial cellulose and obtaining homogeneous solution, mixing graphene, ultrasonically dispersing to obtain mixed solution, adding dopamine solution to mixed solution, performing ultrasonic-adsorption, stirring, adding chloroplatinic acid solution, stirring, filtering, washing, freeze-drying to obtain bacterial cellulose/graphene/platinum precursor, heating the precursor, heat-preserving and carbonizing. USE - Preparation of nitrogen-doped carbonized bacterial cellulose/graphene/platinum composite nano-material (claimed) used in fuel cells and super capacitors. ADVANTAGE - The preparation method is simple and easy to operate. The composite nano-material is prepared with a three-dimensional networked cross-linked skeleton structure with uniform particle size distribution. DETAILED DESCRIPTION - Preparation of nitrogen-doped carbonized bacterial cellulose/graphene/platinum composite nano-material, involves (i) pretreating flocculant bacterial cellulose produced by fermentation of Acetobacter xylinum to obtain pure flocculant bacterial cellulose, (ii) allowing the pure flocculant bacterial cellulose to high-speed homogenization and obtaining homogeneous solution, mixing with graphene, ultrasonically dispersing evenly to obtain a mixed solution, (iii) adding the dopamine solution to the obtained mixed solution, performing ultrasonic-adsorption, mechanically stirring at 25-30 degrees C, and then stirring for 2 hours, adding chloroplatinic acid solution, and stirring evenly, (iv) filtering the reaction product, washing, and freeze-drying to obtain bacterial cellulose/graphene/platinum precursor, (v) heating the precursor at 400 degrees C, heat-preserving for 1 hour, and then heating at 800-1000 degrees C, heat-preserving for 2 hours, carbonizing at high temperature to obtain nitrogen-doped carbonized bacterial cellulose/graphene/platinum composite nano-material. An INDEPENDENT CLAIM is included for nitrogen-doped carbonized bacterial cellulose/graphene/platinum composite nano-material which has sponge-like structure nanomaterial structure, and has doped nitrogen content of 10.2% and nano-platinum particle size of 1.9-2.2 nm.