In-situ transmission electron microscopy (TEM) investigation of the reduction process in graphene oxide

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dc.contributor.authorSilva, Douglas Soares da
dc.contributor.authorViana, Gustavo Alexandre
dc.contributor.authorSilva Filho, José Maria Clemente da
dc.contributor.authorKretly, Luiz Carlos
dc.contributor.authorChaves Neto, Antônio Maia de Jesus
dc.contributor.authorVieira, Lúcia
dc.contributor.authorBarros, Tárcio André dos Santos
dc.contributor.authorMarques, Francisco das Chagas
dc.date.accessioned2026-02-13T14:14:45Z
dc.date.available2026-02-13T14:14:45Z
dc.date.issued22024
dc.description.abstractThe reduction processes of graphene oxide (GO) aim to remove functional groups such as H2O, CO, and CO2 to promote the properties of GO towards those of pure graphene. We adopted the thermal reduction process from room temperature to 320 °C. The transmission electron microscopy (TEM) technique was used to probe the effect of reduction mechanisms. It was observed that the plasmon peaks, referring to sp2 carbon bonds in crystalline structures, are more evident in the reduced graphene oxide (rGO) than GO. The fine structure at the K edge of carbon shows differences in shape linked to the density of states above the Fermi level. Electron energy loss spectroscopy (EELS) analyses revealed an increase in the fraction of sp3 bonds in the reduced sample, consistent with the reduction of functional radicals in the GO structure.
dc.description.physical6 p.
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriFAPESP: 2017/11986-5 CNPq: 465423/2014-0, 442014/2023-6, 302349/2021-9, 313703/2021-3
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationUniversidade Estadual de Campinas
dc.identifier.affiliationUniversidade Federal do Pará
dc.identifier.bibliographicCitationSILVA, D. S. et al. In‐situ transmission electron microscopy (TEM) investigation of the reduction process in graphene oxide. MRS Advances, v. 9, n. 18, p. 1472-1477, 2024. Disponível em: 10.1557/s43580-024-00998-8.
dc.identifier.doi10.1557/s43580-024-00998-8
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/1151
dc.language.isoen_US
dc.publisherSpringer Nature Link
dc.rights.holderMRS Advances
dc.subject.keywordGraphene oxide
dc.subject.keywordTransmission electron microscopy
dc.titleIn-situ transmission electron microscopy (TEM) investigation of the reduction process in graphene oxide
dc.typeArtigos de Periódicos

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