▎ 摘　　要

NOVELTY - The method involves drying and pulverizing the hydrolyzed vegetal protein (HVP) residue powder, and sieving to obtain micron HVP residue powder. The micron-sized HVP residue powder is mixed with the catalyst and placed in a rotary kiln. The temperature is programmed to react at 350-1300degrees Celsius for 6-10 hours under the protection of nitrogen atmosphere, and the temperature is lowered to room temperature to obtain graphitized powder. The graphitized powder and deionized water are mixed and stirred, centrifuged and purified to obtain purified graphite material. The purified graphite material is configured into an aqueous slurry and then ultrasonically treated to obtain a graphene dispersion. The graphene dispersion is dried to obtain the biomass graphene. The catalyst comprises ferric chloride/citric acid or sodium hypochlorite/citric acid combination. The catalyst is described 1-2 wt.% HVP residue. USE - Method for preparing biomass graphene, which is useful in sensor, electric heating film, catalyst, lithium battery, in food industry and condiment industry. ADVANTAGE - The method utilizes high temperature carbonization combined with ultrasonic mechanical peeling technology successfully prepares the biomass graphene from the plant protein residue, expands a new graphene preparation raw material source, solves the problem of the HVP residue subsequent treatment, realizes the environment-friendly requirement of the waste recycling, and is simple safety, safe, low cost, easy for industrial production, and suitable for industrial mass production.