Progress in CO<sub>2</sub> Gas Sensing Technologies: Insights into Metal Oxide Nanostructures and Resistance-Based Methods
The demand for reliable and cost-effective CO<sub>2</sub> gas sensors is escalating due to their extensive applications in various sectors such as food packaging, indoor air quality assessment, and real-time monitoring of anthropogenic CO<sub>2</sub> emissions to mitigate glo...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/16/4/466 |
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| Summary: | The demand for reliable and cost-effective CO<sub>2</sub> gas sensors is escalating due to their extensive applications in various sectors such as food packaging, indoor air quality assessment, and real-time monitoring of anthropogenic CO<sub>2</sub> emissions to mitigate global warming. Nanostructured materials exhibit exceptional properties, including small grain size, controlled morphology, and heterojunction effects, rendering them promising candidates for chemiresistive CO<sub>2</sub> gas sensors. This review article provides an overview of recent advancements in chemiresistive CO<sub>2</sub> gas sensors based on nanostructured semiconducting materials. Specifically, it discusses single oxide structures, metal-decorated oxide nanostructures, and heterostructures, elucidating the correlations between these nanostructures and their CO<sub>2</sub> sensing properties. Additionally, it addresses the challenges and future prospects of chemiresistive CO<sub>2</sub> gas sensors, aiming to provide insights into the ongoing developments in this field. |
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| ISSN: | 2072-666X |