Low-Cost Sensors Based on Nanoparticles of Tin Dioxide Decorated with Graphene Used to Detect Ultra-Low NO<sub>2</sub> Concentrations at Room Temperature
Chemical nanosensors based on nanoparticles (NPs) of pure tin dioxide (SnO<sub>2</sub>) and graphene-decorated tin dioxide were developed and characterized for the detection of pollutant gases. Sensitive layers were prepared by a drop casting method. The photoactivation of the sensors al...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-03-01
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| Series: | Proceedings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-3900/97/1/97 |
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| Summary: | Chemical nanosensors based on nanoparticles (NPs) of pure tin dioxide (SnO<sub>2</sub>) and graphene-decorated tin dioxide were developed and characterized for the detection of pollutant gases. Sensitive layers were prepared by a drop casting method. The photoactivation of the sensors allows for the detection of ultra-low NO<sub>2</sub> concentrations (50 ppb) at room temperature. The sensors show strong responses to NO<sub>2</sub> and weak ones to the other tested polluting gases (CO, CH<sub>4</sub> and CO<sub>2</sub>). The effect of humidity and the presence of graphene on the sensors’ response were studied. |
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| ISSN: | 2504-3900 |