Issue 12, 2024

Enhanced gas sensing performance of sprayed ZnO–ZnWO4 toward CO gas

Abstract

Composite ZnO–ZnWO4 films were obtained by a cost-effective chemical spray pyrolysis approach on a glass substrate using zinc chloride and ammonium metatungstate as starting precursors. The X-ray diffraction investigation indicated that the crystal structure of the obtained films was a composition of ZnO and ZnWO4 phases with the predominant ZnWO4 phase. Scanning electron microscopy images for sprayed mixed ZnO–ZnWO4 layers exhibit a porous structure. Gas sensing performance was tested for detecting carbon monoxide (CO) at different operating temperatures. It was found that the sprayed composite ZnO–ZnWO4 layer shows a maximum sensitivity of 422.7% for 30 ppm CO at 250 °C with good sensor performance. This study suggests that the sprayed ZnO–ZnWO4 composite layer is a good candidate material for CO detection at a relatively low operating temperature.

Graphical abstract: Enhanced gas sensing performance of sprayed ZnO–ZnWO4 toward CO gas

Article information

Article type
Paper
Submitted
07 Feb 2024
Accepted
29 Apr 2024
First published
13 May 2024
This article is Open Access
Creative Commons BY license

Mater. Adv., 2024,5, 5140-5147

Enhanced gas sensing performance of sprayed ZnO–ZnWO4 toward CO gas

M. H. Sayed, T. Dilova, G. Atanasova, G. Avdeev, M. Boshta, A. Og. Dikovska and M. M. Gomaa, Mater. Adv., 2024, 5, 5140 DOI: 10.1039/D4MA00121D

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