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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/46908
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dc.creatorBruno de Souza Gonçalvespt_BR
dc.creatorManuel Noel Paul Georges Houmardpt_BR
dc.creatorEduardo Henrique Martins Nunespt_BR
dc.creatorHugo Guimarães Palharespt_BR
dc.creatorTarcizo da Cruz Costa de Souzapt_BR
dc.creatorVinícius Gomide de Castropt_BR
dc.creatorGlaura Goulart Silvapt_BR
dc.creatorBruno Cordeiro Silvapt_BR
dc.creatorKlaus Wilhelm Heinrich Krambrockpt_BR
dc.creatorRenata Braga Soarespt_BR
dc.creatorVanessa de Freitas Cunha Linspt_BR
dc.date.accessioned2022-11-04T12:54:46Z-
dc.date.available2022-11-04T12:54:46Z-
dc.date.issued2019-
dc.citation.volume8pt_BR
dc.citation.issue6pt_BR
dc.citation.spage6262pt_BR
dc.citation.epage6274pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jmrt.2019.10.020pt_BR
dc.identifier.issn22387854pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/46908-
dc.description.resumoThis work deals with the preparation of reduced graphene oxide (RGO)-TiO2 composites by a one-step hydrothermal treatment. The effect of the RGO loading on both the structural properties and photocatalytic behavior of RGO-TiO2 is deeply addressed herein. The hydrothermal treatment promoted the reduction of graphene oxide, crystallization of TiO2 into anatase, and anchoring of TiO2 nanoparticles on RGO sheets. It was observed that the prepared anatase particles showed sizes below 10 nm, whereas the RGO sheets displayed thicknesses smaller than 1 nm. The use of RGO at concentrations up to 15 wt% greatly increased the specific surface area of RGO-TiO2. It was demonstrated that the combination of RGO and TiO2 gives rise to materials with improved photocatalytic properties and tailored structural properties. The composite with the highest photoactivity was the one containing an RGO loading of 1 wt%; this composite displayed a photocatalytic rate constant about 9.5 times higher than that evaluated for pure TiO2. This behavior may be related to the stacking of RGO nanosheets when its concentration is above 1 wt%. Moreover, the addition of RGO in excess may prevent the activation of the TiO2 surface by UV light and also decrease the lifetime of the photogenerated electron-hole pairs. Therefore, it appears that 1 wt% is the optimal loading of RGO to obtain a close interfacial contact between RGO and TiO2, leading to both an effective activation of TiO2 by UV radiation and an enhanced charge transfer between RGO and TiO2.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)pt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICApt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICApt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of Materials Research and Technology - JMR & Tpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectReduced graphene oxidept_BR
dc.subjectTin dioxidept_BR
dc.subjectTitaniapt_BR
dc.subjectSol-gel processpt_BR
dc.subjectPhotocatalytic evaluationpt_BR
dc.subject.otherGrafenopt_BR
dc.subject.otherÓxido de grafenopt_BR
dc.subject.otherDióxido de titâniopt_BR
dc.titleEffect of the carbon loading on the structural and photocatalytic properties of reduced graphene oxide-TiO2 nanocomposites prepared by hydrothermal synthesispt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S2238785419302613#!pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1543-5416pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6813-2999pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6437-0009pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-0308-0179pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-0873-1671pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7562-0285pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6357-9553pt_BR
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