▎ 摘　　要

NOVELTY - Preparing graphene-based flame retardant comprises stripping graphite by gaseous red phosphorus, and constructing multilayer graphene structure. USE - The method is useful for preparing graphene-based flame retardant. ADVANTAGE - The method: utilizes high-vacuum calcining method to synthesize graphene-based flame retardant without organic solvent; is environment-friendly; and has no threat to human health. The prepared flame retardant has 5 to 7 layers, larger specific surface area, higher thermal conductivity and thermal stability.