A new processing method of CaZn2(OH)(6)center dot 2H(2)O powders: Photoluminescence and growth mechanism
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
01/12/2009
|
| Resumo |
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) In this communication, we report on the formation of calcium hexahydroxodizincate dehydrate, CaZn2(OH)(6)center dot 2H(2)O (CZO) powders under microwave-hydrothermal (MH) conditions. These powders were analyzed by X-ray diffraction (XRD), Field-emission gum scanning electron microscopy (FEG-SEM), ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. XRD patterns confirmed that the pure CZO phase was obtained after MH processing performed at 130 degrees C for 2 h. FEG-SEM micrographs indicated that the morphological modifications as well as the growth of CZO microparticles are governed by Ostwald-ripening and coalescence mechanisms. UV-vis spectra showed that this material have an indirect optical band gap. The pure CZO powders exhibited an yellow PL emission when excited by 350 nm wavelength at room temperature. (C) 2009 Elsevier Masson SAS. All rights reserved. |
| Formato |
2173-2179 |
| Identificador |
http://dx.doi.org/10.1016/j.solidstatesciences.2009.09.002 Solid State Sciences. Amsterdam: Elsevier B.V., v. 11, n. 12, p. 2173-2179, 2009. 1293-2558 http://hdl.handle.net/11449/40354 10.1016/j.solidstatesciences.2009.09.002 WOS:000273067400025 |
| Idioma(s) |
eng |
| Publicador |
Elsevier B.V. |
| Relação |
Solid State Sciences |
| Direitos |
closedAccess |
| Palavras-Chave | #CaZn2(OH)(6)center dot 2H(2)O #Lozenge #Rietveld refinement #Crystal growth #Photoluminescence |
| Tipo |
info:eu-repo/semantics/article |
