Efficient carbon dioxide capture over a nitrogen-rich carbon having a hierarchical micro-mesopore structure

► A new nitrogen-rich carbon having a hierarchical micro-mesopore structure was prepared. ► The effectiveness of this carbon material as a CO2 adsorbent was evaluated. ► High CO2 uptake and excellent CO2/N2 selectivity were achieved. ► CO2 adsorption-desorption test cycles established the material's excellent stability.