▎ 摘　　要

NOVELTY - Preparing cobalt composite nitrogen, phosphorus co-doped porous carbon material, comprises (1) subjecting cobalt source, nitrogen source and phosphorus source with carbon matrix complexation reaction to obtain first product, (2) introducing monomer into first product to carry out in-situ polymerization reaction to obtain second product, and (3) calcining the second product to obtain final product. USE - The cobalt composite nitrogen, phosphorus co-doped porous carbon material is useful as adsorbent including iodine adsorbent (claimed). ADVANTAGE - The method: has simple process and low cost; is easy to be recovered after adsorption is completed; and has little impact on the environment.