Fe2O3-Co3O4 nanocomposite gas sensor for ethanol sensing studies

This study focused on pristine Fe2O3, pristine Co3O4, and Fe2O3-Co3O4 composite using the Pechini sol-gel method for ethanol gas sensing applications. Advanced characterization techniques were used to analyze the phase, morphology, and composition of the synthesized materials. Gas sensors were then...

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Bibliographic Details
Published in:Ceramics international 2024-12, Vol.50 (24), p.52861-52870
Main Authors: Bagherzadeh Enferadi, Seyed Mohammad Hossein, Mirzaei, Ali
Format: Article
Language:English
Subjects:
Co3O4
Composite
Ethanol
Fe2O3
Gas sensor
Sensing mechanism
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Summary:This study focused on pristine Fe2O3, pristine Co3O4, and Fe2O3-Co3O4 composite using the Pechini sol-gel method for ethanol gas sensing applications. Advanced characterization techniques were used to analyze the phase, morphology, and composition of the synthesized materials. Gas sensors were then fabricated and used for ethanol gas sensing at different temperatures. The results indicated that Fe2O3-Co3O4 composite gas sensor crystallized at 600 °C, had higher response compared to both pristine Fe2O3 and pristine Co3O4 gas sensors. The composite sensor manifested a high response of 26.2–100 ppm ethanol at 250 °C, while maximum responses of pristine Co3O4 gas sensor was only 4.4 at 200 °C and that of pristine Fe2O3 sensor was 11.4 at 300 °C. The boosted sensing performance of the composite sensor was related to the formation of p-n heterojunctions between Co3O4 and Fe2O3 in composite sensor, the formation of dangling bonds at interfaces, and high intrinsic ethanol sensing properties of Fe2O3.
ISSN:0272-8842
DOI:10.1016/j.ceramint.2024.10.138