Artículo
Novel approaches of nanoceria with magnetic, photoluminescent, and gas-sensing properties
Rocha, Leandro S.R.; Amoresi, Rafael A.C.; Moreno, Henrique; Ramirez, Miguel A.; Ponce, Miguel Adolfo
; Foschini, Cesar R.; Longo, Elson; Simões, Alexandre Z.
Fecha de publicación:
06/2020
Editorial:
American Chemical Society
Revista:
ACS Omega
ISSN:
2470-1343
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The modification of CeO2 with rare-earth elements opens up a wide range of applications as biomedical devices using infrared emission as well as magnetic and gas-sensing devices, once the structural, morphological, photoluminescent, magnetic, electric, and gas-sensing properties of these systems are strongly correlated to quantum electronic transitions between rare-earth f-states among defective species. Quantitative phase analysis revealed that the nanopowders are free from secondary phases and crystallize in the fluorite-type cubic structure. Magnetic coercive field measurements on the powders indicate that the substitution of cerium with lanthanum (8 wt %), in a fluorite-type cubic structure, created oxygen vacancies and led to a decrease in the fraction of Ce species in the 3+ state, resulting in a stronger room-temperature ferromagnetic response along with high coercivity (160 Oe). In addition to the magnetic and photoluminescent behavior, a fast response time (5.5 s) was observed after CO exposure, indicating that the defective structure of ceria-based materials corresponds to the key of success in terms of applications using photoluminescent, magnetic, or electrical behaviors.
Palabras clave:
Photoluminescent
,
Gas-Sensing Properties
,
Magnetic
,
CeO2
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Rocha, Leandro S.R.; Amoresi, Rafael A.C.; Moreno, Henrique; Ramirez, Miguel A.; Ponce, Miguel Adolfo; et al.; Novel approaches of nanoceria with magnetic, photoluminescent, and gas-sensing properties; American Chemical Society; ACS Omega; 5; 25; 6-2020; 14879-14889
Compartir
Altmétricas