Improving the ozone gas-sensing properties of CuWO4 nanoparticles
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Data
2018-06-05
Autores
Catto, Ariadne C. [UNESP]
Fiorido, Tomas
Souza, Erica L. S.
Avansi, Waldir
Andres, Juan
Aguir, Khalifa
Longo, Elson [UNESP]
Cavalcante, Laecio S.
Silva, Luis F. da
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Editor
Elsevier B.V.
Resumo
This paper consists of an experimental investigation on the effects of annealing temperature on the structural, surface and ozone gas-sensing properties of CuWO4 nanoparticles prepared via a sono-chemical route. X-ray diffraction patterns and X-ray absorption near-edge structure spectroscopy revealed that both long-and short-order structures increase with the annealing temperature. Electrical resistance measurements indicated that CuWO4 samples were sensitive in the range of 15-1400 ppb, exhibiting a good reversibility and repeatability. The enhancement of the ozone gas-sensing properties was attributed to the reduction of hydroxyl species and the improvement of the crystallization degree. This study provides a versatile strategy for obtaining CuWO4 nanoparticles for practical applications as an ozone gas sensor. (C) 2018 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
Sonochemical, CuWO4, Surface, Chemiresistor, Ozone
Como citar
Journal Of Alloys And Compounds. Lausanne: Elsevier Science Sa, v. 748, p. 411-417, 2018.