Remarkable gas adsorption by carbonized nitrogen-rich hypercrosslinked porous organic polymers

Abstract

A series of carbonized materials was obtained using nitrogen-rich hypercrosslinked porous organic polymer as the precursor by high-temperature treatment with/without potassium hydroxide activation. Compared with carbon materials without potassium hydroxide activation, potassium hydroxide-activated carbons show higher surface areas and enhanced gas uptake abilities. The activated carbon material of FCDTPA-K-700 exhibits a high surface area of 2065 m² g⁻¹ and an exceptionally high carbon dioxide uptake up to 6.51 mmol g⁻¹ (1.13 bar/273 K) with a hydrogen uptake ability of 2.61 wt% (1.13 bar/77 K). Moreover, methane storage ability of 2.36 mmol g⁻¹ (1.13 bar/273 K) by FCDTPA-K-700 is also comparable to that of the most porous materials reported. Considering the high surface areas, outstanding gas sorption performances, and facile preparation strategy, these novel carbon materials are very promising for industrial applications, such as carbon dioxide capture and high-density clean energy storage.