| Autor: |
Yanghai Gui, Jintao Wu, Di Zhao, Kuan Tian, Shuaishuai Zhao, Huishi Guo, Xiaoyun Qin, Xiaomei Qin, Dongjie Guo, Yun Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Advanced Science, Vol 11, Iss 39, Pp n/a-n/a (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2198-3844 |
| DOI: |
10.1002/advs.202402352 |
| Popis: |
Abstract H2S gas sensors with facile preparation, low detection limits, and high selectivity are crucial for environmental and human health monitoring. However, it is difficult to maintain a high response of H2S gas sensors under high humidity in practical applications. To face this dilemma, a layer‐by‐layer growth method is applied to in situ prepare a nanostructured Co(CO3)0.5(OH)·0.11H2O/WO3 coated by a hydrophobic hierarchical ZIF‐67 as the H2S sensor. This novel composite exhibits excellent humidity immunity without sacrificing the excellent sensitivity and selectivity of H2S. At a low operating temperature of 90 °C, a remarkable response value of 1052.3 to 100 ppm H2S has been achieved, which is 779 and 9.36 times higher than that of pure WO3 and Co(CO3)0.5(OH)·0.11H2O/WO3, respectively. More importantly, an 82.2% relative response value remains at a high humidity of 75%RH. The sensing mechanisms are investigated using gas chromatography‐mass spectrometry (GC‐MS), which revealed that the reaction products are H2O and SO2. The high humidity immunity and fast response of the Co(CO3)0.5(OH)·0.11H2O@ZIF‐67/WO3 demonstrate the layer‐by‐layer in situ synthesis method holds the potential application for the development of high‐performance WO3‐based H2S sensors. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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