{"title":"Sensitive detection of H<sub>2</sub>S based on Ce doped ZnCo<sub>2</sub>O<sub>4</sub> hollow microspheres at low working temperature.","authors":"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","doi":"10.1039/d4ay00567h","DOIUrl":null,"url":null,"abstract":"<p><p>In order to develop a highly efficient H<sub>2</sub>S gas sensor at low working temperature, in this work, a kind of novel Ce-doped ZnCo<sub>2</sub>O<sub>4</sub> hollow microspheres (Ce/ZnCo<sub>2</sub>O<sub>4</sub> HMSs) were successfully synthesized using a template-free one-pot method, showing a sensitive response toward H<sub>2</sub>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<sub>2</sub>O<sub>4</sub> doped with 6 mol% Ce had the highest response to 20 ppm H<sub>2</sub>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<sub>2</sub>O<sub>4</sub>. The prepared Ce/ZnCo<sub>2</sub>O<sub>4</sub> HMS sensor in response to H<sub>2</sub>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<sub>2</sub>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.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analytical Methods","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d4ay00567h","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
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.