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https://repositorio.ufrn.br/handle/123456789/32276| Título: | Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
| Autor(es): | 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 |
| Palavras-chave: | CaIn2O4;Ultrasonic spray pyrolysis;Nanocrystals;Photocatalysis;Photoluminescence;White-light |
| Data do documento: | 15-Fev-2016 |
| Editor: | Elsevier |
| Referência: | 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. |
| 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 |
| URI: | https://repositorio.ufrn.br/handle/123456789/32276 |
| ISSN: | 0925-8388 |
| Aparece nas coleções: | CT - DEMAT - Artigos publicados em periódicos |
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| EnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf | 1,64 MB | Adobe PDF |  Visualizar/Abrir |
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