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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/57660
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dc.creatorLucas Márlon Castro Silvapt_BR
dc.creatorBruno de Souza Gonçalvespt_BR
dc.creatorJorgimara de Oliveira Bragapt_BR
dc.creatorTarcizo da Cruz Costa de Souzapt_BR
dc.creatorVinícius Gomide de Castropt_BR
dc.creatorGlaura Goulart Silvapt_BR
dc.creatorGlenda Ribeiro de Barros Silveira Lacerdapt_BR
dc.creatorTulio Matenciopt_BR
dc.creatorTiago Campolina Barbosapt_BR
dc.creatorCarlos Martins Vianapt_BR
dc.creatorManuel Noel Paul Georges Houmardpt_BR
dc.creatorEduardo Henrique Martins Nunespt_BR
dc.date.accessioned2023-08-09T19:31:52Z-
dc.date.available2023-08-09T19:31:52Z-
dc.date.issued2021-
dc.citation.volume538pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.apsusc.2020.148029pt_BR
dc.identifier.issn1873-5584pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/57660-
dc.description.resumoSmooth and optically transparent titania (TiO2) and TiO2-reduced graphene oxide (RGO) composite films were successfully prepared here. A nanocrystalline anatase suspension was initially prepared by combining the sol-gel process and hydrothermal treatment. Graphene oxide (GO) nanosheets were prepared following a route similar to the Hummers method. Glass slides were then dip-coated using mixtures of TiO2 and GO suspensions. The concentration of GO in the prepared coatings ranged from 1 to 5 wt%. The coated samples were air-dried, and then either calcined or irradiated with UVA light. It was observed that UVA light promoted the reduction of GO to RGO, which increased both the electrical conductivity and hydrophilicity of the composites. The heat treatment of as-prepared coatings also decreased the water contact angle (WCA) with its surface, which is related to the removal of organics residues, graphene burning, and the increase in surface energy. The superhydrophilicity of the prepared samples was investigated after keeping them in air for up to 60 days, followed by UVA illumination. It was also demonstrated that a hydrophilic behavior can be induced in the samples prepared here by applying a direct current (DC) voltage, which could allow their use as smart materials in several applications.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.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 QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofApplied Surface Sciencept_BR
dc.rightsAcesso Abertopt_BR
dc.subjectTitaniapt_BR
dc.subjectGraphene oxidept_BR
dc.subjectWettabilitypt_BR
dc.subjectUV illuminationpt_BR
dc.subjectCalcinationpt_BR
dc.subjectElectrical propertiespt_BR
dc.subject.otherNanotecnologiapt_BR
dc.subject.otherDióxido de titâniopt_BR
dc.subject.otherRadiação ultravioletapt_BR
dc.subject.otherCalcinação (Metalurgia)pt_BR
dc.subject.otherPropriedades elétricaspt_BR
dc.subject.otherRaios X — Difraçãopt_BR
dc.subject.otherRaman, Espectroscopia dept_BR
dc.subject.otherMicroscopia eletrônica de varredurapt_BR
dc.subject.otherEspectroscopia de ultravioletapt_BR
dc.subject.otherEspectroscopia visívelpt_BR
dc.titlePreparation of titania-reduced graphene oxide composite coatings with electro- and photosensitive propertiespt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0169433220327860pt_BR
dc.identifier.orcidhttps://orcid.org/0009-0002-2962-897Xpt_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/0000-0002-8460-4893pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5660-8125pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6303-4222pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1543-5416pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6653-5137pt_BR
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