Improving the ozone gas-sensing properties of CuWO4 nanoparticles
Scholar | Other documents of the author: Catto, Ariadne C.; Fiorido, Tomas; Souza, Érica L.S.; Avansi, Waldir; Andrés, Juan; Aguir, Khalifa; Longo, Elson; Cavalcante, Laécio S.; Da Silva, Luis F.
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TitleImproving the ozone gas-sensing properties of CuWO4 nanoparticles
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 sonochemical route. X-ray ... [+]
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 sonochemical 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. [-]
Investigation projectBrazilian research financing institutions: FAPESP (Proc. No. 2013/07296-2, 2017/10313-7 and 2017/12437-5) FAPEPI, CNPq (310863/2014-7 and 434266/2016-7), and CAPES ; Brazilian Nanotechnology National Laboratory (Microfabrication team; Project LMF-18580), and the Brazilian Laboratory of Synchrotron Radiation (LNLS, Project D04B-XAFS1-11883)
Bibliographic citationCATTO, Ariadne C., et al. Improving the ozone gas-sensing properties of CuWO4 nanoparticles. Journal of Alloys and Compounds, 2018, 748: 411-417.
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