Sensitive detection of HS based on Ce doped ZnCoO hollow microspheres at low working temperature
In order to develop a highly efficient H 2 S gas sensor at low working temperature, in this work, a kind of novel Ce-doped ZnCo 2 O 4 hollow microspheres (Ce/ZnCo 2 O 4 HMSs) were successfully synthesized using a template-free one-pot method, showing a sensitive response toward H 2 S. The microstruc...
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Published in | Analytical methods Vol. 16; no. 27; pp. 4644 - 4652 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Published |
11.07.2024
|
Online Access | Get full text |
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Summary: | In order to develop a highly efficient H
2
S gas sensor at low working temperature, in this work, a kind of novel Ce-doped ZnCo
2
O
4
hollow microspheres (Ce/ZnCo
2
O
4
HMSs) were successfully synthesized using a template-free one-pot method, showing a sensitive response toward H
2
S. The microstructure and morphology of the material were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The gas-sensing performance of the composite was investigated, showing that the ZnCo
2
O
4
doped with 6 mol% Ce had the highest response to 20 ppm H
2
S at a low operating temperature of 160 °C with a response value of 67.42, which was about 2 times higher than that of original ZnCo
2
O
4
. The prepared Ce/ZnCo
2
O
4
HMS sensor in response to H
2
S exhibited a linear range of 0.1-200 ppm with a low detection limit of 0.1 ppm under the conditions of ambient humidity of 45% and ambient temperature of 20 °C. Meanwhile, it also possessed good selectivity, repeatability and reproducibility. The response value of the sensor decreased by 5.32% after 7 months of continuous monitoring of H
2
S in an atmospheric environment of a pig farm, indicating that the sensor had a long-term stability and continuous service life with important application prospects.
The Ce doped ZnCo
2
O
4
HMS based sensor shows good response to H
2
S at a low operating temperature of 160 °C, exhibiting excellent selectivity, repeatability, and reproducibility, and has the potential for long-term monitoring practical application. |
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ISSN: | 1759-9660 1759-9679 |
DOI: | 10.1039/d4ay00567h |