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Article: Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

TitleDesign of hyperporous graphene networks and their application in solid-amine based carbon capture systems
Authors
Issue Date2017
Citation
Journal of Materials Chemistry A, 2017, v. 5, n. 34, p. 17833-17840 How to Cite?
Abstract© 2017 The Royal Society of Chemistry. We demonstrate a simple and fully scalable method for obtaining hierarchical hyperporous graphene networks of ultrahigh total pore volume by thermal-shock exfoliation of graphene-oxide (exfGO) at a relatively mild temperature of 300 °C. Such pore volume per unit mass has not previously been achieved in any type of porous solid. We find that the amount of oxidation of starting graphene-oxide is the key factor that determines the pore volume and surface area of the final material after thermal shock. Specifically, we emphasize that the development of the hyperporosity is directly proportional to the enhanced oxidation of sp2CC to form CO/COO. Using our method, we reproducibly synthesized remarkable meso-/macro-porous graphene networks with exceptionally high total pore volumes, exceeding 6 cm3g-1. This is a step change compared to ≤3 cm3g-1in conventional GO under similar synthetic conditions. Moreover, a record high amine impregnation of >6 g g-1is readily attained in exfGO samples (solid-amine@exfGO), where amine loading is directly controlled by the pore-structure and volume of the host materials. Such solid-amine@exfGO samples exhibit an ultrahigh selective flue-gas CO2capture of 30-40 wt% at 75 °C with a working capacity of ≈25 wt% and a very long cycling stability under simulated flue-gas stream conditions. To the best of our knowledge, this is the first report where a graphene-oxide based hyperporous carbon network is used to host amines for carbon capture application with exceptionally high storage capacity and stability.
Persistent Identifierhttp://hdl.handle.net/10722/263081
ISSN
2023 Impact Factor: 10.7
2023 SCImago Journal Rankings: 2.804
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGadipelli, Srinivas-
dc.contributor.authorLu, Yue-
dc.contributor.authorSkipper, Neal T.-
dc.contributor.authorYildirim, Taner-
dc.contributor.authorGuo, Zhengxiao-
dc.date.accessioned2018-10-08T09:29:16Z-
dc.date.available2018-10-08T09:29:16Z-
dc.date.issued2017-
dc.identifier.citationJournal of Materials Chemistry A, 2017, v. 5, n. 34, p. 17833-17840-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/10722/263081-
dc.description.abstract© 2017 The Royal Society of Chemistry. We demonstrate a simple and fully scalable method for obtaining hierarchical hyperporous graphene networks of ultrahigh total pore volume by thermal-shock exfoliation of graphene-oxide (exfGO) at a relatively mild temperature of 300 °C. Such pore volume per unit mass has not previously been achieved in any type of porous solid. We find that the amount of oxidation of starting graphene-oxide is the key factor that determines the pore volume and surface area of the final material after thermal shock. Specifically, we emphasize that the development of the hyperporosity is directly proportional to the enhanced oxidation of sp2CC to form CO/COO. Using our method, we reproducibly synthesized remarkable meso-/macro-porous graphene networks with exceptionally high total pore volumes, exceeding 6 cm3g-1. This is a step change compared to ≤3 cm3g-1in conventional GO under similar synthetic conditions. Moreover, a record high amine impregnation of >6 g g-1is readily attained in exfGO samples (solid-amine@exfGO), where amine loading is directly controlled by the pore-structure and volume of the host materials. Such solid-amine@exfGO samples exhibit an ultrahigh selective flue-gas CO2capture of 30-40 wt% at 75 °C with a working capacity of ≈25 wt% and a very long cycling stability under simulated flue-gas stream conditions. To the best of our knowledge, this is the first report where a graphene-oxide based hyperporous carbon network is used to host amines for carbon capture application with exceptionally high storage capacity and stability.-
dc.languageeng-
dc.relation.ispartofJournal of Materials Chemistry A-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleDesign of hyperporous graphene networks and their application in solid-amine based carbon capture systems-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1039/c7ta05789j-
dc.identifier.scopuseid_2-s2.0-85028705156-
dc.identifier.volume5-
dc.identifier.issue34-
dc.identifier.spage17833-
dc.identifier.epage17840-
dc.identifier.eissn2050-7496-
dc.identifier.isiWOS:000408592900010-
dc.identifier.issnl2050-7496-

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