Color and structural analysis of CoxZn7−xSb2O12 pigments

The polymeric precursor method was successfully used to synthesize CoxZn7−xSb2O12 (x = 0–7) powders. Pigments were evaluated using colorimetry, X-ray diffraction, UV–vis and infrared spectroscopy. The optical band gap values vary with the Co2+ substitution. These results suggest that the concomitant...

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Principais autores:	Gouveia, Deiby Santos, Soledade, Luiz Edmundo Bastos, Paskocimas, Carlos Alberto, Silva, Elson Longo da, Souza, Antônio Gouveia de, Santos, Ieda Maria Garcia dos
Formato:	article
Idioma:	English
Publicado em:	Elsevier
Assuntos:	Ceramics Oxides Chemical synthesis Color centers
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/32281
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spelling	ri-123456789-322812021-04-25T08:53:47Z Color and structural analysis of CoxZn7−xSb2O12 pigments Gouveia, Deiby Santos Soledade, Luiz Edmundo Bastos Paskocimas, Carlos Alberto Silva, Elson Longo da Souza, Antônio Gouveia de Santos, Ieda Maria Garcia dos Ceramics Oxides Chemical synthesis Color centers The polymeric precursor method was successfully used to synthesize CoxZn7−xSb2O12 (x = 0–7) powders. Pigments were evaluated using colorimetry, X-ray diffraction, UV–vis and infrared spectroscopy. The optical band gap values vary with the Co2+ substitution. These results suggest that the concomitant presence of Co and Zn in the spinel lattice leads to the rupture of the Végard law, as well as other properties of the studied system, such as unit cell volume. The Co-richer samples display a higher absorbance than the Co-lean samples. The high absorption of the Co7Sb2O12 sample at most of the visible region makes this compound a candidate for a black pigment. It was shown that color depends on the site where the chromophore ion is located, in agreement with the ligand field theory. 2021-04-19T19:03:16Z 2021-04-19T19:03:16Z 2006-11-09 article GOUVEIA, D.s.; SOLEDADE, L.e.B.; PASKOCIMAS, C.A.; LONGO, E.; SOUZA, A.G.; SANTOS, I.M.G.. Color and structural analysis of CoxZn7−xSb2O12 pigments. Materials Research Bulletin, [S.L.], v. 41, n. 11, p. 2049-2056, nov. 2006. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0025540806001474?via%3Dihub. Acesso em: 18 mar. 2021. http://dx.doi.org/10.1016/j.materresbull.2006.04.012. 0025-5408 https://repositorio.ufrn.br/handle/123456789/32281 10.1016/j.materresbull.2006.04.012. en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Elsevier
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Ceramics Oxides Chemical synthesis Color centers
spellingShingle	Ceramics Oxides Chemical synthesis Color centers Gouveia, Deiby Santos Soledade, Luiz Edmundo Bastos Paskocimas, Carlos Alberto Silva, Elson Longo da Souza, Antônio Gouveia de Santos, Ieda Maria Garcia dos Color and structural analysis of CoxZn7−xSb2O12 pigments
description	The polymeric precursor method was successfully used to synthesize CoxZn7−xSb2O12 (x = 0–7) powders. Pigments were evaluated using colorimetry, X-ray diffraction, UV–vis and infrared spectroscopy. The optical band gap values vary with the Co2+ substitution. These results suggest that the concomitant presence of Co and Zn in the spinel lattice leads to the rupture of the Végard law, as well as other properties of the studied system, such as unit cell volume. The Co-richer samples display a higher absorbance than the Co-lean samples. The high absorption of the Co7Sb2O12 sample at most of the visible region makes this compound a candidate for a black pigment. It was shown that color depends on the site where the chromophore ion is located, in agreement with the ligand field theory.
format	article
author	Gouveia, Deiby Santos Soledade, Luiz Edmundo Bastos Paskocimas, Carlos Alberto Silva, Elson Longo da Souza, Antônio Gouveia de Santos, Ieda Maria Garcia dos
author_facet	Gouveia, Deiby Santos Soledade, Luiz Edmundo Bastos Paskocimas, Carlos Alberto Silva, Elson Longo da Souza, Antônio Gouveia de Santos, Ieda Maria Garcia dos
author_sort	Gouveia, Deiby Santos
title	Color and structural analysis of CoxZn7−xSb2O12 pigments
title_short	Color and structural analysis of CoxZn7−xSb2O12 pigments
title_full	Color and structural analysis of CoxZn7−xSb2O12 pigments
title_fullStr	Color and structural analysis of CoxZn7−xSb2O12 pigments
title_full_unstemmed	Color and structural analysis of CoxZn7−xSb2O12 pigments
title_sort	color and structural analysis of coxzn7−xsb2o12 pigments
publisher	Elsevier
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/32281
work_keys_str_mv	AT gouveiadeibysantos colorandstructuralanalysisofcoxzn7xsb2o12pigments AT soledadeluizedmundobastos colorandstructuralanalysisofcoxzn7xsb2o12pigments AT paskocimascarlosalberto colorandstructuralanalysisofcoxzn7xsb2o12pigments AT silvaelsonlongoda colorandstructuralanalysisofcoxzn7xsb2o12pigments AT souzaantoniogouveiade colorandstructuralanalysisofcoxzn7xsb2o12pigments AT santosiedamariagarciados colorandstructuralanalysisofcoxzn7xsb2o12pigments
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Color and structural analysis of CoxZn7−xSb2O12 pigments

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