Sonochemical synthesis of reduced graphene oxide

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dc.contributor.authorMOURA, E.A.pt_BR
dc.contributor.authorISHIKAWA, O.pt_BR
dc.contributor.authorMANGIERI, F.pt_BR
dc.contributor.authorBARTOLOMEI, M.R.pt_BR
dc.contributor.authorBARTOLOMEI, S.S.pt_BR
dc.contributor.authorOLIVEIRA, R.R.pt_BR
dc.contributor.authorFRANCISCO, D.L.pt_BR
dc.contributor.authorGUIMARÃES, K.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoPAN-AMERICAN NANOTECHNOLOGY CONFERENCE, 2ndpt_BR
dc.date.accessioned2021-03-04T18:30:12Z
dc.date.available2021-03-04T18:30:12Z
dc.date.eventoMarch 4-7, 2020pt_BR
dc.description.abstractThe reduction of graphene oxide (GO) by a safe and eco-friendly route, without the use of harmful chemicals, has drawn much attention as one of the most promising routes to produce graphene nanosheets, a 2D material with excellent electrical and thermal conductivity, optical and mechanical properties. Graphite exfoliation is widely performed by the chemical reduction of GO, which is commonly produced by oxidation of graphite using a strong oxidizing agent by Hummers’ method. This work presents a study of the influence of sonochemical application on synthesis of reduced graphene oxide induced by UV radiation. Commercial graphite powder was used as raw material. Firstly, graphite powder was dispersed into a DMF/deionized water solution and ultrasonicated using a high intensity ultrasonic device for 1 8 hours in other to reduce the particle sizes. After, sonicated graphite samples were frozen for 24 hours and freeze-dried for 24 hours to obtain the powder. Graphite powder obtained with different particle sizes was used to prepared GO through a chemical route. GO prepared was dispersed into a DMF/deionized water solution, ultrasonicated using a high intensity ultrasonic device for 1-2 hours, frozen for 24 hours and freeze-dried for 24 hours. Finally, GO powder samples were dispersed in a mixture of isopropyl alcohol, acetone, and deionized water and irradiated using UV radiation by different irradiation time to obtain reduced GO (RGO). The GO and RGO were characterized by BET, ATR–FTIR, XRD, Raman, TG, and FE-SEM analysis. In addition, graphite samples were characterized by BET, SEM and XRD analysis. The results showed that sonochemical application has a fundamental role in the synthesis of GO nanosheets and RGO. Ultrasonically prepared GO exhibited higher surface area, higher crystallinity and higher oxidation efficiency with many hydrophilic groups. FE-SEM analysis of the GO showed that sonochemical application reduced the aggregated domains and close stacking of sheets on the GO surface and led to obtaining reduced GO with a smooth surface, fewer layers and significant effective surface area.pt_BR
dc.event.siglaPANNANOpt_BR
dc.identifier.citationMOURA, E.A.; ISHIKAWA, O.; MANGIERI, F.; BARTOLOMEI, M.R.; BARTOLOMEI, S.S.; OLIVEIRA, R.R.; FRANCISCO, D.L.; GUIMARÃES, K. Sonochemical synthesis of reduced graphene oxide: methods and characterization. In: PAN-AMERICAN NANOTECHNOLOGY CONFERENCE, 2nd, March 4-7, 2020, Águas de Lindoia, SP. <b>Abstract...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/31870.
dc.identifier.orcid0000-0003-3546-1643pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-3546-1643
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31870
dc.local.eventoÁguas de Lindoia, SPpt_BR
dc.rightsopenAccesspt_BR
dc.titleSonochemical synthesis of reduced graphene oxidept_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorOTAVIO HIROKI ISHIKAWA
ipen.autorRENE RAMOS DE OLIVEIRA
ipen.autorMARCIO RUBENS XAVIER BARTOLOMEI
ipen.autorFELLYPE OTAVIO GOMES MANGIERI
ipen.autorESPERIDIANA AUGUSTA BARRETOS DE MOURA
ipen.codigoautor15215
ipen.codigoautor942
ipen.codigoautor15100
ipen.codigoautor15314
ipen.codigoautor1045
ipen.contributor.ipenauthorOTAVIO HIROKI ISHIKAWA
ipen.contributor.ipenauthorRENE RAMOS DE OLIVEIRA
ipen.contributor.ipenauthorMARCIO RUBENS XAVIER BARTOLOMEI
ipen.contributor.ipenauthorFELLYPE OTAVIO GOMES MANGIERI
ipen.contributor.ipenauthorESPERIDIANA AUGUSTA BARRETOS DE MOURA
ipen.date.recebimento21-03
ipen.event.datapadronizada2020pt_BR
ipen.identifier.ipendoc27641pt_BR
ipen.notas.internasAbstractpt_BR
ipen.subtitulomethods and characterizationpt_BR
ipen.type.genreResumo
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relation.isAuthorOfPublicationb56dc8d5-99b9-470b-a66d-098efd4f7939
relation.isAuthorOfPublication57933ff0-ea00-4cd3-9e30-a35d0a278ec2
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relation.isAuthorOfPublication6bf804a8-aeed-4e9c-bad7-fdec1b1e9a47
relation.isAuthorOfPublication.latestForDiscovery6bf804a8-aeed-4e9c-bad7-fdec1b1e9a47
sigepi.autor.atividadeOLIVEIRA, R.R.:942:730:Npt_BR
sigepi.autor.atividadeMOURA, E.A.:1045:740:Spt_BR
sigepi.autor.atividadeMANGIERI, F.:15314:740:N
sigepi.autor.atividadeBARTOLOMEI, M.R.:15100:740:N
sigepi.autor.atividadeISHIKAWA, O.:15215:740:N
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