Energy Efficient Synthesis of Ordered Mesoporous Carbon Nitrides with a High Nitrogen Content and Enhanced CO₂ Capture Capacity

Abstract

Highly ordered mesoporous carbon nitrides (MCN) with 3D structure and a high nitrogen content are successfully prepared for the first time using "uncalcined" mesoporous silica template, KIT-6 and 3-amino-1,2,4-triazole as a single molecular carbon and nitrogen precursor. The prepared MCN with C and N stoichiometry of C₃ N₅ shows unique CN framework and exhibits the CO₂ capture capacity of 5.63 mmol g^-1 at 273 K and 30 bar, which is higher than that of MCN with 2D structure and C₃ N₄ stoichiometry.