▎ 摘　　要

NOVELTY - An adsorbent comprises a graphene oxide layer having an interconnected network structure and carbon nitride formed on the graphene oxide layer. USE - Adsorbent for carbon dioxide from industrial exhaust gas. ADVANTAGE - The adsorbent shows excellent selectivity and stability and improved regeneratability, while providing increased carbon dioxide adsorption capacity even in the absence of a metal. The adsorbent has excellent adsorption/desorption characteristics even at room temperature under ambient pressure and shows high selectivity to nitrogen gas. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of an adsorbent, which involves mixing a dispersion of graphene oxide with a dispersion of monomers containing nitrogen and carbon, gelling the resultant mixture, and heat treating the resultant gel to form carbon nitride derived from the monomers and providing on the network structure of the graphene oxide.