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Enhanced Acetic Anhydride Detection Based on ZnO/ La2O3 Nanoparticles with High Selectivity and Sensitivity

Acetic anhydride is a crucial chemical composition for heroin synthesis and is also a hazardous volatile organic compound. Hence, the development of a reliable and sensitive chemical sensor for its detection is essential. In this study, ZnO/La 2 O 3 nanoparticles were successfully synthesized via a...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2024-01, Vol.73, p.1-1
Main Authors: Cheng, Zhan, Zhu, Hongmin, Ji, Hanyang, Kong, Lu, Yuan, Zhenyu, Meng, Fanli
Format: Article
Language:English
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Summary:Acetic anhydride is a crucial chemical composition for heroin synthesis and is also a hazardous volatile organic compound. Hence, the development of a reliable and sensitive chemical sensor for its detection is essential. In this study, ZnO/La 2 O 3 nanoparticles were successfully synthesized via a simple one-step hydrothermal process to detect acetic anhydride. The surface morphology, composition, and microstructure of particles were thoroughly analyzed. The 0.2 at% La-ZnO based gas sensor exhibits a maximum of 422 toward 100 ppm acetic anhydride at the optimal operating temperature of 300°C. The synergistic catalysis between ZnO and La 2 O 3 heterojunction solves the problem of low sensitivity of pure ZnO to acetic anhydride. The unique selectivity and high sensitivity of sensors to acetic anhydride are associated with the Lewis acids-bases interaction because of the enhanced Lewis base sites on the surface of sensing materials. Significantly, the gas-sensitive mechanism is elaborated, including the effect of heterojunction and oxygen vacancies, and the catalysis of La 2 O 3 . The most important thing is that the rapid detection of acetic anhydride has been realized, which is significant in curbing the spread of drugs.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2024.3396837