Directed synthesis of nanoporous carbons from task-specific ionic liquid precursors for the adsorption of CO2

Shannon M Mahurin, Pasquale F Fulvio, Patrick C Hillesheim, Kimberly M Nelson, Gabriel M Veith, Sheng Dai
ChemSusChem 2014, 7 (12): 3284-9
Postcombustion CO2 capture has become a key component of greenhouse-gas reduction as anthropogenic emissions continue to impact the environment. We report a one-step synthesis of porous carbon materials using a series of task-specific ionic liquids for the adsorption of CO2 . By varying the structure of the ionic liquid precursor, we were able to control pore architecture and surface functional groups of the carbon materials in this one-step synthesis process leading to adsorbents with high CO2 sorption capacities (up to 4.067 mmol g(-1) ) at 0 °C and 1 bar. Added nitrogen functional groups led to high CO2 /N2 adsorption-selectivity values ranging from 20 to 37 whereas simultaneously the interaction energy was enhanced relative to carbon materials with no added nitrogen.

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