Correlation of photocatalytic activity and defects generated in Ca2+-based heterojunctions

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dc.contributor.authorColeto, Ubirajara [UNESP]
dc.contributor.authorAmoresi, Rafael A. C. [UNESP]
dc.contributor.authorPereira, Chrystopher A. M. [UNESP]
dc.contributor.authorSchmidt, Bruna W. [UNESP]
dc.contributor.authorIani, Isabela M. [UNESP]
dc.contributor.authorSimões, Alexandre Z. [UNESP]
dc.contributor.authorMonteiro, Elias S. [UNESP]
dc.contributor.authorLongo, Elson
dc.contributor.authorZaghete, Maria A. [UNESP]
dc.contributor.authorPerazolli, Leinig A. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFederal Institute of São Paulo - IFSP
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2021-06-25T11:11:23Z
dc.date.available2021-06-25T11:11:23Z
dc.date.issued2020-11-01
dc.description.abstractIn this work a new semiconductor based on calcium heterojunction (CaO/CaTiO3) was evaluated to the optical properties correlated to crystalline lattice defects. The heterojunctions of the semiconductor were prepared by the sol–gel route and its formation was confirmed by the intimate contact interface between crystalline phases. Morphology and elemental composition of the nanometric heterojunction were evaluated. Chemical environment and composition of the surface were used to determine the oxidation state of the material constituents. The electronic structure was evaluated and the relationship among band gap energy, photoluminescent emission energy, and photocatalytic activity of the materials was demonstrated. Oxygen vacancies located on the surface promoted photoluminescent spectra emission in the green wavelength, making them more photoactive than those defects that emitted in the red region. The use of active species scavenger indicated that the photogenerated species with the greatest photocatalytic action was the superoxide radical. This study has developed calcium heterojunctions for application as photocatalysts, demonstrating the importance of the defects generated in the production of heterojunctions and the activity of photogenerated species, studied using scavengers.en
dc.description.affiliationLIEC - Chemistry Institute São Paulo State University - UNESP
dc.description.affiliationDepartment of Chemistry Federal Institute of São Paulo - IFSP
dc.description.affiliationFaculty of Engineering of Guaratinguetá UNESP
dc.description.affiliationLIEC - Department of Chemistry São Carlos Federal University - UFSCar
dc.description.affiliationUnespLIEC - Chemistry Institute São Paulo State University - UNESP
dc.description.affiliationUnespFaculty of Engineering of Guaratinguetá UNESP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2017/19143-7
dc.identifierhttp://dx.doi.org/10.1007/s42452-020-03662-6
dc.identifier.citationSN Applied Sciences, v. 2, n. 11, 2020.
dc.identifier.doi10.1007/s42452-020-03662-6
dc.identifier.issn2523-3971
dc.identifier.scopus2-s2.0-85100616366
dc.identifier.urihttp://hdl.handle.net/11449/208391
dc.language.isoeng
dc.relation.ispartofSN Applied Sciences
dc.sourceScopus
dc.subjectHeterojunctions
dc.subjectOxygen vacancies
dc.subjectPhotocatalysis
dc.subjectScavenger
dc.subjectStructural defects
dc.titleCorrelation of photocatalytic activity and defects generated in Ca2+-based heterojunctionsen
dc.typeArtigo
unesp.author.orcid0000-0003-0651-2827[1]

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