▎ 摘　　要

NOVELTY - Graphene-coated porous carbon composite material is three-dimensional porous structure, where Langmuir specific surface area of graphene-coated porous carbon composite material is 1100-1300 square meter per gram. The total pore volume of graphene-coated porous carbon composite material is 0.40-0.60cube centimeter per gram. USE - Graphene-coated porous carbon composite material used for preparing slow release pesticide (claimed). ADVANTAGE - The graphene-coated porous carbon composite material ensures high absorption capacity and good slow-release effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-coated porous carbon composite material, which involves: (A) freezing and drying mixture of silkworm sand and zinc chloride solution; (B) washing, drying and baking freeze-dried material in protected environment to obtain silkworm porous carbon material; (C) stirring silkworm porous carbon material and graphene oxide solution; (D) drying obtained mixture in hydrogen protection atmosphere in plasma reactor; and (E) water-cleaning and drying obtained material to obtain product.