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Título: | Influence of temperature on the structural and color properties of nickel molybdates. |
Autor(es): | Silva, Maíra Vieira da Oliveira, Daynara Faustina Moreira de Oliveira, Henrique dos Santos Siqueira, Kisla Prislen Félix |
Palavras-chave: | Ceramics Chemical synthesis X-ray diffraction Color centers Crystal structure |
Data do documento: | 2020 |
Referência: | SILVA, M. V. da et al. Influence of temperature on the structural and color properties of nickel molybdates. Materials Research Bulletin, v. 122, artigo 110665, 2020. Disponível em: <https://www.sciencedirect.com/science/article/abs/pii/S0025540819320380>. Acesso em: 10 jun. 2021. |
Resumo: | In this work, nickel molybdates were synthesized by co-precipitation method, at 70 °C, and were thermally treated at temperatures ranging from 300 to 1000 °C. Firstly, the hydrated precursor (NiMoO4.0.65H2O) was obtained, followed by calcination at 300–600 °C to produce a mixture of β- and α-NiMoO4 phases. The pure α phase could only be obtained above 700 °C. The relationships among the crystal structure, colorimetric parameters, and spectroscopic properties (Raman and UV–vis diffuse reflectance) of the NiMoO4 were in vestigated. Although the thermochromic β phase was not obtained in the pure form, the heat treatments enabled tuning of the band gaps of the materials, with the color changing from yellow to greenish-yellow and the band gap changing from 3.23 to 2.33 eV. The colorimetric parameters (L*a*b*) were determined and the coloring performances of the NiMoO4 materials were evaluated by incorporating them into a clear polymer substrate material. |
URI: | http://www.repositorio.ufop.br/jspui/handle/123456789/14220 |
Link para o artigo: | https://www.sciencedirect.com/science/article/abs/pii/S0025540819320380 |
DOI: | https://doi.org/10.1016/j.materresbull.2019.110665 |
ISSN: | 0025-5408 |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_InfluenceTemperatureStructural.pdf Restricted Access | 3 MB | Adobe PDF | Visualizar/Abrir |
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