▎ 摘　　要

NOVELTY - The preparation method of heavy oil residue-based nitrogen-doped porous graphene involves (1) dissolving heavy oil residue solid in toluene, and uniformly dispersing to obtain solution (A), (2) adding mesoporous graphite-phase carbon nitride to the solution (A) in step (1), and uniformly dispersing to obtain solution (B), (3) evaporating and recycling toluene in the solution (B) to obtain heavy oil residue/mesoporous graphite-phase carbon nitride solid powder, and (4) heat-treating the heavy oil residue/mesoporous graphite-phase carbon nitride solid powder at high temperature. USE - Preparation method of heavy oil residue-based nitrogen-doped porous graphene (claimed). ADVANTAGE - The method enables preparation of heavy oil residue-based nitrogen-doped porous graphene with high nitrogen content and large specific surface area, which avoids the processing of subsequent template, by simple process.