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Integration of polymerized ionic liquid with graphene for enhanced CO2 adsorption
P. Tamilarasan,
Published in Royal Society of Chemistry
2015
Volume: 3
   
Issue: 1
Pages: 101 - 108
Abstract
In this study, we have integrated an ionic liquid (IL) or polymerized ionic liquid (PIL) with graphene to demonstrate enhanced carbon dioxide adsorption properties. Graphene was non-covalently functionalized by IL or PIL, and the carbon dioxide adsorption and desorption properties were determined at low-pressures (<100 kPa). Upon functionalization, IL uniformly covers the graphene surface, while PIL forms highly distributed porous nanoparticles. The PIL functionalized graphene shows 22% higher adsorption capacity than graphene, while IL functionalization improves it only by 2%. This highlights the advantage of polymerizing the ionic liquid. Interestingly, the adsorption capacities of integrated system are higher than those of individual constituents (either graphene or IL or PIL). It is found that PIL functionalization offers more favorability of adsorption with a high adsorption energy. Isosteric heats of adsorption are calculated to be in the range of 18-28 kJ mol-1, suggesting an ease of adsorbent regeneration. These results encourage the integration of PIL with other high surface area nanostructures for further improvement in the adsorption capacity. This journal is © The Royal Society of Chemistry 2015.
About the journal
JournalData powered by TypesetJournal of Materials Chemistry A
PublisherData powered by TypesetRoyal Society of Chemistry
ISSN20507488
Open AccessNo
Concepts (13)
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    Carbon dioxide
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    Graphene
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    Ionic liquids
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    Polymers
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    Adsorbent regeneration
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    Adsorption capacities
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    Adsorption energies
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    CARBON DIOXIDE ADSORPTION
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    Functionalized graphene
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    Isosteric heats of adsorptions
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    POLYMERIZED IONIC LIQUIDS
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    POROUS NANOPARTICLES
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    Gas adsorption