Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Paskocimas, Carlos Alberto; Santiago, Anderson de Azevedo Gomes; Andrade Neto, Nivaldo Freire de; Silva, Elson Longo da; Motta, Fabiana Villela da; Delmonte, Maurício Roberto Bomio

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Página do item simplificado Estatísticas

dc.contributor.author	Paskocimas, Carlos Alberto
dc.contributor.author	Santiago, Anderson de Azevedo Gomes
dc.contributor.author	Andrade Neto, Nivaldo Freire de
dc.contributor.author	Silva, Elson Longo da
dc.contributor.author	Motta, Fabiana Villela da
dc.contributor.author	Delmonte, Maurício Roberto Bomio
dc.date.accessioned	2021-04-12T14:57:22Z
dc.date.available	2021-04-12T14:57:22Z
dc.date.issued	2019-05-17
dc.description.resumo	In this work, CeO2:xEu3+ (x=0, 0.01, 0.02, 0.04 and 0.08 mol%) microspheres were obtained by the fast and continuous ultrasonic spray pyrolysis method. Powders were characterized by X-ray difraction (XRD), X-ray fuorescence analysis (XRF), scanning electronic microscopy (FESEM), Raman spectra, UV–Visible spectroscopy (UV–Vis) and photocatalytic activity. All XRD patterns were indexed by the cubic structure of the fuorite type, without the presence of secondary phases, indicating success in the Eu3+ doping in the CeO2 structure. In addition, The XRF analysis confrmed the presence of Eu in the CeO2 powders. In the Raman spectra of the samples occurs the vibrational mode F2g, which is a characteristic band of materials with the fuorite type structure. Moreover, as the Eu3+ ion increased, it was noticed the appearance of additional bands referring to oxygen vacancies. FESEM showed that the CeO2:xEu3+ particles have a spherical morphology with homogeneous chemical composition and particle size between 73 and 1560 nm. It can be seen a slight increase of defects in their morphology as the Eu3+ ion increases. The band gap varies between 3.22 and 3.28 eV, being infuenced by defects in oxygen vacancies and the concentration of Ce3+ ion. The addition of Eu3+ generates the introduction of intermediary levels in the conduction band of CeO2, besides increasing the reactive species efects, favoring the photocatalysis of Rhodamine B dye	pt_BR
dc.identifier.citation	SANTIAGO, A. A. G. ; ANDRADE NETO, N. F. ; LONGO, E. ; PASKOCIMAS, C. A. ; F. V. MOTTA ; BOMIO, M. R. D. . Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity. Journal of Materials Science: Materials in Electronics, v. 30, p. 11508-11519, 2019. Disponível em: https://link.springer.com/article/10.1007%2Fs10854-019-01506-7. Acesso em: 04 dez. 2020. https://doi.org/10.1007/s10854-019-01506-7	pt_BR
dc.identifier.doi	10.1007/s10854-019-01506-7
dc.identifier.issn	1573-482X
dc.identifier.issn	0957-4522
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/32154
dc.language	en	pt_BR
dc.publisher	Springer	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Eu3+ doped	pt_BR
dc.subject	CeO2 microspheres	pt_BR
dc.subject	Ultrasonic spray pyrolysis	pt_BR
dc.subject	Photocatalytic activity	pt_BR
dc.title	Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity	pt_BR
dc.type	article	pt_BR