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High Surface Area "3D Graphene Oxide" for Enhanced Sorption of Radionuclides
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-3881-6764
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow, Russian Federation.
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-1535-9476
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-8438-2581
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2022 (English)In: Advanced Materials Interfaces, ISSN 2196-7350, Vol. 9, no 18, article id 2200510Article in journal (Refereed) Published
Abstract [en]

Here preparation of high surface area activated reduced graphene oxide (arGO) oxidized into a 3D analogue of defect-rich GO (dGO) is reported. Surface oxidation of arGO results in carbon to oxygen ratio C/O = 3.3, similar to the oxidation state of graphene oxide while preserving high BET surface area of about 880 m2 g−1. Analysis of surface oxidized arGO shows high abundance of oxygen functional groups which converts hydrophobic precursor into hydrophilic material. High surface area carbons provide the whole surface for oxidation without the need of intercalation and lattice expansion. Therefore, surface oxidation methods are sufficient to convert the materials into 3D architectures with chemical properties similar to graphene oxide. The "3D graphene oxide" shows high sorption capacity for U(VI) removal in an extraordinary broad interval of pH. Notably, the surface oxidized carbon material has a rigid 3D structure with micropores accessible for penetration of radionuclide ions. Therefore, the bulk "3D GO" can be used as a sorbent directly without dispersing, the step required for GO to make its surface area accessible for pollutants.

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 9, no 18, article id 2200510
Keywords [en]
graphene, graphene oxide, high surface area, radionuclides, sorption
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-196103DOI: 10.1002/admi.202200510ISI: 000797817600001Scopus ID: 2-s2.0-85130220162OAI: oai:DiVA.org:umu-196103DiVA, id: diva2:1672690
Funder
EU, European Research Council, 759696Swedish Research Council, 2017‐04173EU, Horizon 2020, 785219EU, Horizon 2020, 881603
Note

This article also appears in: "Hot Topic: Carbon, Graphite, and Graphene"

Available from: 2022-06-20 Created: 2022-06-20 Last updated: 2022-11-29Bibliographically approved

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Boulanger, NicolasIakunkov, ArtemNordenström, AndreasTalyzin, Aleksandr V.

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