Method for preparing catalytic graphitized few-layer coal-based graphene

A method for preparing catalytic graphitized few-layer coal-based graphene, comprising:

• S1, raw material pretreatment:
• comprising crushing coal samples to 200 mesh, then treating with hydrochloric-hydrofluoric acid for deashing, and drying at 25° C. for 12 h to obtain a row coal material;
• S2, catalyst mixing:
• comprising grinding a raw coal and boric acid thoroughly until uniformly mixed, achieving a particle size of 200 mesh, then loading the mixture into a graphite crucible;
• S3, high-temperature graphitization:
• comprising transferring the graphite crucible into a medium-frequency induction graphitization furnace, after evacuating a chamber, introducing protective gas, and raising a temperature to a heat treatment temperature, holding, then cooling naturally to room temperature;
• S4, product characterization:
• comprising using high-resolution transmission electron microscopy, X-ray diffraction, and four-probe conductivity test to characterize morphology, structural characteristics, and conductive characteristics of few-layer coal-based graphene.