The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO2 Nanocrystals

Página do item simplificado
dc.contributor.authorMoreno, H. [UNESP]
dc.contributor.authorDomingues, G. L. [UNESP]
dc.contributor.authorAssis, M.
dc.contributor.authorOrtega, P. P. [UNESP]
dc.contributor.authorMastelaro, V.
dc.contributor.authorRamirez, M. A. [UNESP]
dc.contributor.authorSimões, A. Z. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity Jaume I
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2023-07-29T16:07:42Z
dc.date.available2023-07-29T16:07:42Z
dc.date.issued2023-03-13
dc.description.abstractIn this work, we focus on understanding the morphology and photocatalytic properties of CeO2 nanocrystals (NCs) synthesized via a microwave-assisted solvothermal method using acetone and ethanol as solvents. Wulff constructions reveal a complete map of available morphologies and a theoretical-experimental match with octahedral nanoparticles obtained through synthesis using ethanol as solvent. NCs synthesized in acetone show a greater contribution of emission peaks in the blue region (∼450 nm), which may be associated with higher Ce3+ concentration, originating shallow-level defects within the CeO2 lattice while for the samples synthesized in ethanol a strong orange-red emission (∼595 nm) suggests that oxygen vacancies may originate from deep-level defects within the optical bandgap region. The superior photocatalytic response of CeO2 synthesized in acetone compared to that of CeO2 synthesized in ethanol may be associated with an increase in long-/short-range disorder within the CeO2 structure, causing the Egap value to decrease, facilitating light absorption. Furthermore, surface (100) stabilization in samples synthesized in ethanol may be related to low photocatalytic activity. Photocatalytic degradation was facilitated by the generation of ·OH and ·O2- radicals as corroborated by the trapping experiment. The mechanism of enhanced photocatalytic activity has been proposed suggesting that samples synthesized in acetone tend to have lower e′─h· pair recombination, which is reflected in their higher photocatalytic response.en
dc.description.affiliationSchool of Engineering and Science São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, São Paulo
dc.description.affiliationDepartment of Analytical and Physical Chemistry University Jaume I, Av. Vicent Sos Baynat s/n
dc.description.affiliationSão Carlos Institute of Physics University of São Paulo
dc.description.affiliationUnespSchool of Engineering and Science São Paulo State University, Av. Dr. Ariberto Pereira da Cunha 333, Portal das Colinas, São Paulo
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent4291-4303
dc.identifierhttp://dx.doi.org/10.1021/acs.inorgchem.2c04411
dc.identifier.citationInorganic Chemistry, v. 62, n. 10, p. 4291-4303, 2023.
dc.identifier.doi10.1021/acs.inorgchem.2c04411
dc.identifier.issn1520-510X
dc.identifier.issn0020-1669
dc.identifier.scopus2-s2.0-85149363747
dc.identifier.urihttp://hdl.handle.net/11449/249730
dc.language.isoeng
dc.relation.ispartofInorganic Chemistry
dc.sourceScopus
dc.titleThe Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO2 Nanocrystalsen
dc.typeArtigo
unesp.author.orcid0000-0003-0275-0043[1]
unesp.author.orcid0000-0003-0355-5565[3]
unesp.author.orcid0000-0002-4254-1281[4]
unesp.author.orcid0000-0001-9512-4214[5]
unesp.departmentMateriais e Tecnologia - FEGpt

Arquivos

Coleções

Guaratinguetá - FEG - Faculdade de Engenharia e Ciências