▎ 摘　　要

NOVELTY - Preparing melanin/graphene nano-composite material comprises (i) mixing the melanin and N, N-dimethylacetamide and heating to obtain the melanin solution, (ii) mixing the melanin solution, carboxylated graphene and acidic solution and heating to obtain the first mixture, (iii) calcining the first mixture obtained in the step (ii) to obtain a second mixture, (iv) performing ultrasonic treatment to the second mixture obtained in the step (iii) to obtain a third mixture, and (v) washing and drying the third mixture obtained in the step (iv) to obtain the melanin/graphene nano composite material. USE - The melanin/graphene nanocomposite material is useful in fuel cell power generation, organic matter removal and heavy metal reduction (claimed). ADVANTAGE - The method: is simple, economical, environment-friendly and suitable for industrial large-scale production; and the obtained product has excellent conductive performance, high electron transfer efficiency and wide application range. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for melanin/graphene nano-composite material prepared by the above mentioned method.