The
porous carbons have attracted tremendous interest for CO2 capture application thanks to their abundant availability
and tunable physical properties. However, they suffer from insufficient
CO2 utilization performance due to the poor active sites
on their surface. Herein, we report for the first time the fabrication
of urea-formaldehyde resin-derived N-rich porous carbon via two-step
synthetic routes with physical carbonization followed by KOH activating.
The optimized sample included 9.87 wt % N exhibit notable CO2 uptake capacities (5.42 and 3.53 mmol g–1 at 0
and 25 °C at 1 bar) and high selectivity efficiency of 23 between
CO2 and N2 at ambient pressure. Overall, on
the basis of the in-depth characterization techniques, the advanced
textural properties and incorporation of nitrogen into carbon surfaces
contribute to increasing the CO2 uptake capacity and selectivity
efficiency.
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