Improving the ozone gas-sensing properties of CuWO4 nanoparticles

JOURNAL OF ALLOYS AND COMPOUNDS

卷:748

Article

Catto, Ariadne C.¹  Fiorido, Tomas²  Souza, Erica L. S.³  Avansi, Waldir, Jr.⁴  Andres, Juan⁵  Aguir, Khalifa²  Longo, Elson¹  Cavalcante, Laecio S.³  da Silva, Luis F.⁴ 

[1] Sao Paulo State Univ, Inst Chem, POB 355, BR-14801907 Araraquara, SP, Brazil

[2] Aix Marseille Univ, CNRS UMR 7334 IM2NP, FS St Jerome S152, F-13397 Marseille, France

[3] Univ Estadual Piaui, PPGQ CCN, POB 381, BR-64002150 Teresina, PI, Brazil

[4] Univ Fed Sao Carlos, Dept Phys, Lab Nanostruct Multifunct Mat, BR-13565905 Sao Carlos, SP, Brazil

[5] Jaume I Univ, Dept Chem & Phys, Castellon De La Plana, Spain

关键词: Sonochemical;    CuWO4;    Surface;    Chemiresistor;    Ozone;   

DOI  :  10.1016/j.jallcom.2018.03.104

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free