▎ 摘　　要

NOVELTY - Use of waste banana is claimed for preparing graphene material involves crushing the dried waste peels of banana to obtain waste banana powder, adding the obtained waste banana powder in a tubular furnace, under nitrogen atmosphere, heating at 450-500 degrees C for 1-2 hours, continuously heating at 800-1100 degrees C for 0.5-2 hours, and slowly cooling to 25-35 degrees C to obtain the pre-carbonisation product. The pre-carbonisation product is mixed with activator in weight ratio of 1:1-5, under nitrogen atmosphere in tubular furnace, heated at 450-500 degrees C for 1-2 hours, continuously heated at 800-1100 degrees C. USE - Waste banana used for preparing graphene material (claimed). ADVANTAGE - The waste banana for preparing graphene material is easy to process in a simple, eco-friendly and cost-effective manner. It avoids using concentrated sulfuric acid in graphite powder by the method of reduction which cause the pollution to the environment, and realizes the continuous industrial production. DETAILED DESCRIPTION - Use of waste banana is claimed for preparing graphene material involves crushing the dried waste peels of banana to obtain waste banana powder, adding the obtained waste banana powder in a tubular furnace, under nitrogen atmosphere, heating at 450-500 degrees C for 1-2 hours, continuously heating at 800-1100 degrees C for 0.5-2 hours, and slowly cooling to 25-35 degrees C to obtain the pre-carbonisation product. The pre-carbonisation product is mixed with activator in weight ratio of 1:1-5, under nitrogen atmosphere in tubular furnace, heated at 450-500 degrees C for 1-2 hours, continuously heated at 800-1100 degrees C for 0.5-2 hours and slowly cooled to room temperature to obtain the waste banana biomass graphene, where the activator is potassium hydroxide, aluminum nitrate or zinc nitrate.