Biotemplate synthesis of a CoO microtube sensor for fast triethylamine detection

A low operating temperature and short response/recovery time are essential factors for sensors. Hence, it is necessary to create a sensor that can quickly detect target gas at a relatively low temperature. In this work, Co 3 O 4 microtube based sensors were fabricated by a bio-template method using...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2023-08, Vol.52 (31), p.1835-1843
Main Authors: Xu, Tingting, Wang, Heru, Zhao, Jing, Zhao, Fangbo, Cong, Wenbo, Wang, Guiling, Li, Junqing
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Summary:A low operating temperature and short response/recovery time are essential factors for sensors. Hence, it is necessary to create a sensor that can quickly detect target gas at a relatively low temperature. In this work, Co 3 O 4 microtube based sensors were fabricated by a bio-template method using absorbent cotton. Co 3 O 4 microtube sensors prepared in different concentrations of a salt solution displayed different sensitivities to triethylamine (TEA). The Co 3 O 4 -0.10 microtube sensor exhibited excellent sensitivity to TEA at 160 °C. The response of the Co 3 O 4 -0.10 sensor to 100 ppm TEA gas was 31.27 and the detection limit of TEA was 50 ppb. Meanwhile, the Co 3 O 4 -0.10 sensor also showed a short response/recovery time, such as 95 s/38 s to 100 ppm TEA, high selectivity, a good linear relationship ( R 2 = 0.994 for 1-100 ppm TEA and R 2 = 0.991 for 50-1000 ppb TEA gas), fine repeatability and long-term stability, and strong humidity resistance. Thus, Co 3 O 4 microtube based sensors prepared using a bio-template method have potential application prospects for the detection of TEA gas. Co 3 O 4 -0.10 sensors exhibit excellent sensitivity to TEA at 160 °C with the detection limit of 50 ppb. Meanwhile, the Co 3 O 4 -0.10 sensor also shows a short response/recovery time, fine repeatability, long-term stability and humidity resistance.
ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt01450a