Preparação de vidros e vitrocerâmicas de óxidos de metais pesados contendo prata: propriedades ópticas, estruturais e eletroquímicas
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Data
2012-01-01
Autores
Bregadiolli, Bruna A. [UNESP]
Souza, Ernesto R.
Sigoli, Fernando A.
Caiut, José M. A.
Alencar, Mônica A. S. [UNESP]
Benedetti, Assis V. [UNESP]
Nalin, Marcelo
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
Silver containing heavy metal oxide glasses and glass ceramics of the system WO3-SbPO4-PbO-AgCl with different AgCl contents have been prepared and their thermal, structural and optical properties characterized. Glass ceramics containing metallic silver nanoparticles have been prepared by annealing glass samples at temperatures above the glass transition and analyzed by transmission electron microscopy and energy dispersive X-ray microanalysis. The presence of the metallic clusters has been also confirmed by the observation of a surface plasmon resonance band in the visible range. Cyclic voltammetric measurements indicated the presence of metallic silver into the glasses, even before to perform the thermal treatment.
Descrição
Palavras-chave
glass, glassceramics, nanoparticles
Como citar
Química Nova. Sociedade Brasileira de Química, v. 35, n. 4, p. 755-761, 2012.