Visible-light driven catalytic activity of two novel Cu(II) and Ni(II) titanium niobates

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dc.creatorSusana Fátima Resende
dc.creatorRodinei Augusti
dc.creatorGeraldo Magela de Lima
dc.creatorRafael Lucas Gouveia
dc.creatorBernardo dos Santos Oliveira
dc.creatorKlaus Wilhelm Heinrich Krambrock
dc.creatorGuilherme Oliveira Siqueira
dc.creatorFabrício Vieira de Andrade
dc.date.accessioned2023-02-15T19:33:50Z
dc.date.accessioned2025-09-09T00:28:48Z
dc.date.available2023-02-15T19:33:50Z
dc.date.issued2019
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
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.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1016/j.jece.2019.103065
dc.identifier.issn22133437
dc.identifier.urihttps://hdl.handle.net/1843/50092
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Restrito
dc.subjectCobre
dc.subjectNíquel
dc.subjectFotocatálise
dc.subject.otherCobre
dc.subject.otherNíquel
dc.subject.otherFotocatálise
dc.titleVisible-light driven catalytic activity of two novel Cu(II) and Ni(II) titanium niobates
dc.typeArtigo de periódico
local.citation.epage7
local.citation.issue3
local.citation.spage1
local.citation.volume7
local.description.resumoNovel copper (Cu0.25Ti0.25Nb0.5O2) and nickel (Ni0.25Ti0.25Nb0.5O2) titanium-niobate materials were synthesized by the solid state method and fully characterized. In view of their band gap energies in the visible region, these materials were tested as catalysts to degrade Indigo Carmine, chosen as a prototype organic molecule. Aqueous solutions of this dye with hydrogen peroxide and the above-mentioned materials were irradiated with visible light. Hydrogen peroxide was employed aiming at reducing the recombination rate of the photogenerated charges and to increase the production of hydroxyl radicals. In these experimental conditions, the Cu(II)-based material (Cu-Nb) showed a superior performance than the Ni(II) analogue (90% versus 20% degradation efficiency after an exposure time of 150 min, respectively). The results seem to indicate that the degradation probably takes place via two distinct heterogeneous processes: photocatalysis and photo-Fenton-like. Finally, the Cu-Nb material has a remarkable potential to be used in the remediation of water bodies contaminated with organic pollutants.
local.identifier.orcidhttps://orcid.org/0000-0002-9448-9518
local.identifier.orcidhttps://orcid.org/0000-0002-7562-0285
local.identifier.orcidhttps://orcid.org/0000-0002-7481-191X
local.identifier.orcidhttps://orcid.org/0000-0002-0024-0966
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S2213343719301885?via%3Dihub

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