Sensitive detection of H2S based on Ce doped ZnCo2O4 hollow microspheres at low working temperature

Jia Ying Huang, Hao Jun Li, Lin Xuan Li, Rong Chen, Fang Liu, Ling Wu, Ze Meng Feng, Yu Long Yin, Zhong Cao*, Donghong Yu*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In order to develop a highly efficient H2S gas sensor at low working temperature, in this work, a kind of novel Ce-doped ZnCo2O4 hollow microspheres (Ce/ZnCo2O4 HMSs) were successfully synthesized using a template-free one-pot method, showing a sensitive response toward H2S. 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 ZnCo2O4 doped with 6 mol% Ce had the highest response to 20 ppm H2S 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 ZnCo2O4. The prepared Ce/ZnCo2O4 HMS sensor in response to H2S 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 H2S 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.

Original languageEnglish
JournalAnalytical Methods
Volume16
Issue number27
Pages (from-to)4644-4652
Number of pages9
ISSN1759-9660
DOIs
Publication statusPublished - 11 Jul 2024

Bibliographical note

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© 2024 The Royal Society of Chemistry.

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