N-doped microporous carbons derived from direct carbonization of K+ exchanged meta-aminophenol–formaldehyde resin for superior CO2 sorption

Abstract

N-doped microporous carbons with uniform ultramicropores (∼0.50 nm) are facilely prepared by direct carbonization of K⁺ exchanged meta-aminophenol–formaldehyde resin. These materials give an unprecedented CO₂ uptake of 1.67 mmol g⁻¹ at 25 °C and 0.15 bar and superior CO₂-over-N₂ selectivity (50 : 1).