Cellulose generated-microporous carbon nanosheets with nitrogen doping

Abstract

Nanosheet porous carbon with surface area of 1854 m² g⁻¹ and pore volume of 0.82 cm³ g⁻¹ is synthesized using cellulose and KOH–urea, the sheet structure is formed during drying and it was kept after carbonization. The nitrogen-containing groups are incorporated into the carbon matrix through urea decomposition and mainly existed as pyridine-like, pyrrole-like and graphite-like nitrogen species. Unique compositional and structural features endow the nitrogen-doped porous carbon nanosheets with superior CO₂ adsorption performance of 5.8 mmol g⁻¹.