The increased CO2 adsorption performance of chitosan-derived activated carbons with nitrogen-dopingElectronic supplementary information (ESI) available: Details of materials characterization and adsorption experiments, N2 adsorption-desorption isotherms, pore size distributions and powder X-ray diffraction patterns. See DOI: 10.1039/c5cc06934c

Highly porous nitrogen-doped activated carbons (NACs) were prepared by the chemical activation of chitosan using alkali carbonates. The NACs exhibited extremely high CO 2 capacities of 1.6 mmol g −1 (15 kPa) and 4.9 mmol g −1 (100 kPa) at 25 °C. Nitrogen atoms doped into carbon frameworks clearly enhanced CO 2 adsorption at low partial pressures. Highly porous nitrogen-doped activated carbons (NACs) were prepared by the chemical activation of chitosan using alkali carbonates.