The increased CO2 adsorption performance of chitosan-derived activated carbons with nitrogen-doping

Abstract

Highly porous nitrogen-doped activated carbons (NACs) were prepared by the chemical activation of chitosan using alkali carbonates. The NACs exhibited extremely high CO₂ 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 CO₂ adsorption at low partial pressures.