Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals

Paskocimas, Carlos Alberto; Melo, M. M.; Araújo, Vinícius Dantas; Tranquilin, Ricardo Luis; Almeida, Cláudio Romero Rodrigues de; Delmonte, Maurício Roberto Bomio; Tavares, Mara T. S.; Silva, Elson Longo da; Motta, Fabiana Villela da

Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals

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dc.contributor.author	Paskocimas, Carlos Alberto
dc.contributor.author	Melo, M. M.
dc.contributor.author	Araújo, Vinícius Dantas
dc.contributor.author	Tranquilin, Ricardo Luis
dc.contributor.author	Almeida, Cláudio Romero Rodrigues de
dc.contributor.author	Delmonte, Maurício Roberto Bomio
dc.contributor.author	Tavares, Mara T. S.
dc.contributor.author	Silva, Elson Longo da
dc.contributor.author	Motta, Fabiana Villela da
dc.date.accessioned	2021-04-19T14:43:35Z
dc.date.available	2021-04-19T14:43:35Z
dc.date.issued	2016-02-15
dc.description.resumo	CaIn2O4 (CIO) nanocrystals (NCs) were prepared by ultrasonic spray pyrolysis at 1223 K without the use of surfactants to investigate the influences of the nanostructure on the photoluminescence and photo-catalytic properties of this white-light emitter. The optical properties were analyzed by ultraviolet evisible (UVevis) absorption spectroscopy, which indicated a band gap energy of 3.83 eV, and photo-luminescence (PL) measurements at room temperature that showed a broad and intense emission band. X-ray diffraction (XRD) analysis confirmed that the CIO NCs adopted the orthorhombic crystalline phase. Field-emission gun scanning electron microscopy (FEG-SEM) micrographs demonstrated the spherical morphology of the CIO NCs, comprising aggregates of several CIO NCs. Furthermore, the as-synthesized CIO NCs exhibited enhanced activity for the photodegradation of methylene blue (MB) under UVevis irradiation. The chromaticity coordinates were calculated for the sample based on the PL spectrum; the CIO NCs had values of x 1⁄4 0.31 and y 1⁄4 0.38, and this point is located on the white region of the CIE diagram. Ultrasonic spray pyrolysis provides a feasible approach for preparing shape- and size-controlled CIO nanocrystals that hold great potential for photocatalytic applications and as photoluminescent white emitters	pt_BR
dc.identifier.citation	TAVARES, M.T.s.; MELO, M.M.; ARAðJO, V.D.; TRANQUILIN, R.L.; ALMEIDA, C.R.R.; PASKOCIMAS, C.A.; BOMIO, M.R.D.; LONGO, E.; MOTTA, F.V.. Enhancement of the photocatalytic activity and white emission of CaIn 2 O 4 nanocrystals. Journal Of Alloys And Compounds, [S.L.], v. 658, p. 316-323, fev. 2016. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838815314110?via%3Dihub. Acesso em: 11 dez. 2020. http://dx.doi.org/10.1016/j.jallcom.2015.10.155.	pt_BR
dc.identifier.doi	10.1016/j.jallcom.2015.10.155
dc.identifier.issn	0925-8388
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/32276
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	CaIn2O4	pt_BR
dc.subject	Ultrasonic spray pyrolysis	pt_BR
dc.subject	Nanocrystals	pt_BR
dc.subject	Photocatalysis	pt_BR
dc.subject	Photoluminescence	pt_BR
dc.subject	White-light	pt_BR
dc.title	Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals	pt_BR
dc.type	article	pt_BR