▎ 摘　　要

NOVELTY - Preparing graphene by porous solid strong acid framework in dry powder state comprises (i) taking graphite powder and porous framework of solid strong acid, (ii) taking graphite powder and transporting onto solid strong acid surface using, and carrying out oxidation to obtain oxidized graphite powder, and (iii) peeling off oxidized graphite powder from strong acid surface using intermittent high speed air flow to obtain oxidation graphite alkenyl powder, and carrying out reduction to obtain graphene material. USE - The method is useful for preparing graphene by porous solid strong acid framework in dry powder state (claimed). ADVANTAGE - The method: is simple; avoids the operation of strong inorganic protonic acids; does not utilizes toxic organic reactants; and is environmentally friendly. DETAILED DESCRIPTION - Preparing graphene by porous solid strong acid framework in dry powder state comprises (i) taking graphite powder having particle size of 10-50 mu m as raw material, porous framework of solid strong acid as oxidizing agent, where the mass ratio of graphite powder and porous skeleton of solid strong acid is 1:0.5-2, (ii) taking graphite powder and transporting onto solid strong acid surface using high speed air flow, allowing to stand for 1-5 hours, and carrying out oxidation of porous framework of solid strong acid under room temperature condition to obtain oxidized graphite powder, and (iii) peeling off oxidized graphite powder from strong acid surface using intermittent high speed air flow to obtain oxidation graphite alkenyl powder, and carrying out reduction to obtain graphene material.