From chitosan to urea-modified carbons: Tailoring the ultra-microporosity for enhanced CO2 adsorption

Adeela Rehman,Soojin Park

Published 2020 in Carbon

ABSTRACT

Abstract In the past few years, nitrogen-enriched microporous carbons have garnered much attention as emerging CO2 adsorbents; however, the roles of ultra-microporosity and nitrogen content have rarely been studied. The present work focuses on designing a series of microporous carbons with different concentrations of nitrogen ranging from 0 to 11 at.%. With variation of the concentration of urea and KOH, carbons with a high surface area (368–2150 m2 g−1) and high micropore volume (0.2255–1.3020 cm3 g−1) were attained. Tailoring the ultra-microporosity resulted in effective CO2 adsorption. The optimized material, CUK-112, exhibited the highest micropore volume (

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