Light-Activated Room Temperature Surface Acoustic Wave H<sub>2</sub>S Sensor Based on Bi<sub>2</sub>S<sub>3</sub> Nanoribbons
The expansion of the Internet of Things (IoT) has rendered wireless passive, highly stable, and room-temperature gas sensors indispensable for sensor applications. In this work, a room-temperature surface acoustic wave (SAW) H<sub>2</sub>S sensor based on a thin film of nano-mesh woven w...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/25/4/1122 |
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| Summary: | The expansion of the Internet of Things (IoT) has rendered wireless passive, highly stable, and room-temperature gas sensors indispensable for sensor applications. In this work, a room-temperature surface acoustic wave (SAW) H<sub>2</sub>S sensor based on a thin film of nano-mesh woven with Bi<sub>2</sub>S<sub>3</sub> nanoribbons was successfully designed and prepared. The impact of varying inorganic salts solution ligand substitution of long-chain organic ligands of Bi<sub>2</sub>S<sub>3</sub> films on performance was assessed. Notably, the responses of the sensors following ligand substitution exhibited improvement to varying degrees. In particular, the Cu(NO<sub>3</sub>)<sub>2</sub>-treated sensor to 10 ppm H<sub>2</sub>S was 203% of that of the untreated sensor. Furthermore, the impact of visible light activation on sensor performance was assessed. The results show the sensor has a high sensitivity to H<sub>2</sub>S molecules under yellow light activation at room temperature, with excellent selectivity, fast response speed and low detection limit. The sensor exhibited a response to 10 ppm H<sub>2</sub>S under yellow light activation that was approximately equal ~ two times greater than the response observed in a dark environment. This work provides a novel approach to enhance the performance of room-temperature SAW H<sub>2</sub>S sensors. |
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| ISSN: | 1424-8220 |