An enhanced triethylamine response by incorporating mesoporous CuO into nanosheet-assembled Co3O4 microtubes

Realizing high gas response to triethylamine (TEA) are desirable for employment of sensors in applications of industrial safety and assessing the freshness of the seafood. Herein, a CuO/Co3O4 heteojunction is proposed to improve the gas response performance via incorporating mesoporous CuO into nano...

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Published in:Sensors and actuators. B, Chemical Chemical, 2023-03, Vol.379, p.133230, Article 133230
Main Authors: Zhao, Fan, Hu, Chonghao, Yu, Lingmin, Li, Senlin, Yin, Mingli, Fan, Xinhui
Format: Article
Language:English
Subjects:
Co3O4 microtubes
Gas sensor
Heterointerface
Mesoporous CuO
Triethylamine
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Summary:Realizing high gas response to triethylamine (TEA) are desirable for employment of sensors in applications of industrial safety and assessing the freshness of the seafood. Herein, a CuO/Co3O4 heteojunction is proposed to improve the gas response performance via incorporating mesoporous CuO into nanosheet-assembled Co3O4 microtubes. A novel approach to generate different proportion mesoporous CuO/Co3O4 heterojunction is demonstrated, through which the morphologies can be fine-tuned. The resultant gas sensing performance shows that the Cu-Co-2 specimen exhibits the remarkably enhanced gas response value (7.6) to 200 ppm TEA, wide linear detection range (1–200 ppm), excellent repeatability and long-term stability as well as good gas selectivity to TEA gas at the working temperature of 320 ℃, which can be attributed to the surface active sites and the CuO/Co3O4 heterointerface. This facile approach sheds lights on the design of sensing materials via construction of heterostructures for the high efficiency detection of target gas. •CuO/Co3O4 composites were successfully prepared by a feasible water bath method.•An remarkably enhanced gas response to TEA at 320℃was obtained compared with the pristine Co3O4.•The gas sensing mechanism is discussed from the perspective of heterojunction.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2022.133230