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dc.contributor.author
Ortega, P.P.
dc.contributor.author
Hangai, B.
dc.contributor.author
Moreno, H.
dc.contributor.author
Rocha, L.S.R.
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Ramírez, M.A.
dc.contributor.author
Ponce, Miguel Adolfo
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dc.contributor.author
Longo, E.
dc.contributor.author
Simões, A.Z.
dc.date.available
2022-12-15T10:29:35Z
dc.date.issued
2021-12
dc.identifier.citation
Ortega, P.P.; Hangai, B.; Moreno, H.; Rocha, L.S.R.; Ramírez, M.A.; et al.; Tuning structural, optical, and gas sensing properties of ceria-based materials by rare-earth doping; Elsevier Science SA; Journal of Alloys and Compounds; 888; 161517; 12-2021; 1-11
dc.identifier.issn
0925-8388
dc.identifier.uri
http://hdl.handle.net/11336/181224
dc.description.abstract
In this study, we investigate the influence of rare-earth dopants on the structural, optical, gas sensing properties of Ce1-(3/4)xRExO2 (RE = Eu, La; x = 0.0 and 0.08) nanoparticles synthesized using the microwave-assisted hydrothermal method. X-ray diffraction analysis confirmed the formation of CeO2 fluorite structure free of secondary phases. Raman spectroscopy indicates oxygen vacancies are the dominant defect in the samples. Additionally, doping with La and Eu decreased the bandgap energy of the pure sample. The different dopants changed the photoluminescence spectrum of pure ceria, leading to blue (La) and red (Eu) emissions with a higher number of electronic transitions for the Eu-doped nanoparticles, which consists of six bands between 550 and 750 nm. For the thick films fabricated using the as-prepared nanoparticles, a measurable response in terms of resistivity was observed during interactions with vacuum, dry air, and carbon monoxide atmospheres. The Eu-doped thick film reacted much faster (1 s) with carbon monoxide compared to La-doped (4.2 s) and pure ceria (6.6 s), corresponding to an improvement when compared with other studies reported in the literature. Doping the ceria structure proved to be beneficial to its carbon monoxide sensing properties and produced tunable photoluminescent emissions, which are promising for white LED applications.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science SA
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
CERIUM DIOXIDE
dc.subject
GAS SENSOR
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NANOPARTICLES
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RARE-EARTH
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THICK FILMS
dc.subject.classification
Cerámicos
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Tuning structural, optical, and gas sensing properties of ceria-based materials by rare-earth doping
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-09-20T17:58:49Z
dc.journal.volume
888
dc.journal.number
161517
dc.journal.pagination
1-11
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Ortega, P.P.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Hangai, B.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Moreno, H.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Rocha, L.S.R.. Universidade Federal do São Carlos; Brasil
dc.description.fil
Fil: Ramírez, M.A.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Ponce, Miguel Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.description.fil
Fil: Longo, E.. Universidade Federal do São Carlos; Brasil
dc.description.fil
Fil: Simões, A.Z.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.journal.title
Journal of Alloys and Compounds
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jallcom.2021.161517
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925838821029261
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