Relationship between surface segregation and rapid propane electrical response in Cd-doped SnO2 nanomaterials

Nenhuma Miniatura disponível
Citações na Scopus
24
Tipo de produção
Artigo
Data
2008-07-05
Autores
Castro R. H. R.
Hidalgo P.
Perez H.E.M.
Ramirez-Fernandez F.J.
Gouvea D.
Orientador
Periódico
Sensors and Actuators, B: Chemical
Título da Revista
ISSN da Revista
Título de Volume
Citação
CASTRO, R. H. R.; HIDALGO, P.; PEREZ, H. E. M.; RAMIREZ-FERNANDEZ, F. J.; GOUVEA, D. Relationship between surface segregation and rapid propane electrical response in Cd-doped SnO2 nanomaterials. Sensors and Actuators, B: Chemical, v. 133, n. 1, p. 263-269, Jul. 2008.
Texto completo (DOI)
Palavras-chave
Resumo
Controlling the surface properties of nanoparticles using ionic dopants prone to be surface segregated has emerged as an interesting tool for obtaining highly selective and sensitive sensors. In this work, the surface segregation of Cd cations on SnO2 nanopowders prepared by the Pechini's method was studied by infrared spectroscopy, X-ray diffraction, and specific surface area analysis. We observed that the surface chemistry modifications caused by the surface segregation of Cd and the large specific surface area were closely responsible for a rapid and regular electrical response of 5 mol% Cd-doped SnO2 films to 100 ppm propane and NOx diluted in dry air at relatively low temperature (100 °C). © 2008 Elsevier B.V. All rights reserved.

Coleções