Solvent effect on the structure and photocatalytic behavior of TiO2-RGO nanocomposites

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dc.creatorBruno de Souza Gonçalves
dc.creatorManuel Noel Paul Georges Houmard
dc.creatorEduardo Henrique Martins Nunes
dc.creatorLucas Márlon Castro Silva
dc.creatorTarcizo da Cruz Costa de Souza
dc.creatorVinícius Gomes de Castro
dc.creatorGlaura Goulart Silva
dc.creatorBruno Cordeiro Silva
dc.creatorKlaus Wilhelm Heinrich Krambrock
dc.creatorRenata Braga Soares
dc.creatorVanessa de Freitas Cunha Lins
dc.date.accessioned2022-11-07T18:56:27Z
dc.date.accessioned2025-09-08T23:33:04Z
dc.date.available2022-11-07T18:56:27Z
dc.date.issued2019
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.identifier.doihttps://doi.org/10.1557/jmr.2019.342
dc.identifier.issn20445326
dc.identifier.urihttps://hdl.handle.net/1843/46993
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Materials Research
dc.rightsAcesso Restrito
dc.subjectÓxido de grafeno
dc.subjectNanocompósitos
dc.subject.otherReduced graphene oxide
dc.subject.otherTiO2
dc.subject.otherNanocomposite
dc.subject.otherTitania
dc.titleSolvent effect on the structure and photocatalytic behavior of TiO2-RGO nanocomposites
dc.typeArtigo de periódico
local.citation.epage3930
local.citation.spage3918
local.citation.volume34
local.description.resumoThere is no agreement regarding which solvent is more suitable to obtain sol–gel–derived titania (TiO2) samples with an enhanced photocatalytic behavior. Furthermore, the solvent effect on the preparation of TiO2-RGO (reduced graphene oxide) nanocomposites has not been published yet and could be an attractive experimental strategy to modulate structure and properties. On the basis of these observations, TiO2-RGO nanocomposites were fabricated in this study. It was evaluated for the influence of using either isopropyl (IsoprOH) or ethyl (EtOH) alcohol on the textural and photocatalytic properties of the prepared materials. The use of IsoprOH led to samples with smaller crystallite size, narrower apparent band gap, smaller isoelectric point, larger adsorption capacity, and higher photocatalytic activity. In addition, the incorporation of RGO into TiO2 greatly improved the adsorption capacity and photocatalytic activity of the latter. However, the optimal loading of RGO to prepare composites with enhanced photocatalytic activities was 1 wt%. This finding can be related to the stacking of RGO sheets when concentrations above 1 wt% are used, which could prevent UV light to reach the TiO2 particles and also decrease the photocatalytic capacity of the composites. Moreover, materials with RGO concentration above 1 wt% could exhibit a highly negatively charged surface, which may decrease the separation of the generated electron–hole pairs and lead to faster recombination rates of charge carriers.
local.identifier.orcidhttps://orcid.org/0000-0002-1543-5416
local.identifier.orcidhttps://orcid.org/0000-0001-6437-0009
local.identifier.orcidhttps://orcid.org/0000-0002-0308-0179
local.identifier.orcidhttps://orcid.org/0000-0002-0873-1671
local.identifier.orcidhttps://orcid.org/0000-0002-7562-0285
local.identifier.orcidhttps://orcid.org/0000-0002-6357-9553
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICA
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1557/jmr.2019.342#citeas

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