▎ 摘　　要

NOVELTY - Preparing magnetic hollow cobalt oxide-nitrogen-doped porous carbon, comprises dispersing graphene oxide powder in water ultrasonically for 1 hours, adding methanol and continue to disperse for 1 hours to obtain graphene oxide dispersion, (ii) dissolving zinc nitrate hexahydrate, cobalt nitratehexahydrate, and dispersant in methanol to obtain a mixed solution (iii) dissolving dimethylimidazole in methanol to obtain a solution, (iv) adding mixed solution to the graphene oxide dispersion, mixing well for 2 hour, adding dimethylimidazole solution prepared in the third step, mixing for 24 hours, centrifuging resulting mixed solution, washing, drying to obtain purple powder, (iv) calcining purple powder in nitrogen atmosphere, calcining in air. USE - The magnetic hollow cobalt oxide-nitrogen-doped porous carbon is useful in treatment of antibiotic wastewater (claimed). ADVANTAGE - The catalyst can activate potassium peroxymonosulfate composite salt to efficiently degrade sulfamethoxazole, and has better reusability, better stability and easy recycling. The introduction of nitrogen improves the catalytic activity, The evaporation of zinc during the carbonization process increases the specific surface area, using reduced graphene oxide as a supporting substrate not only improves the catalytic activity of the catalyst, the aggregation of adjacent cobalt oxide particles and the leaching concentration of cobalt in the catalytic system are reduced. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for magnetic hollow cobalt oxide-nitrogen-doped porous carbon prepared by above mentioned method