Enhanced Triethylamine-Sensing Characteristics of SnS<sub>2</sub>/LaFeO<sub>3</sub> Composite
Triethylamine (TEA), a volatile organic compound (VOC), has important applications in industrial production. However, TEA has an irritating odor and potential toxicity, making it necessary to develop sensitive TEA gas sensors with high efficiency. This study focused on preparing LaFeO<sub>3<...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Chemosensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-9040/13/7/228 |
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| Summary: | Triethylamine (TEA), a volatile organic compound (VOC), has important applications in industrial production. However, TEA has an irritating odor and potential toxicity, making it necessary to develop sensitive TEA gas sensors with high efficiency. This study focused on preparing LaFeO<sub>3</sub> nanoparticles modified by SnS<sub>2</sub> nanosheets (SnS<sub>2</sub>/LaFeO<sub>3</sub> composite) using a hydrothermal method together with sol–gel technique. According to the comparison results of the gas-sensing performance between pure LaFeO<sub>3</sub> and SnS<sub>2</sub>/LaFeO<sub>3</sub> composite with varying composition ratios, 5% SnS<sub>2</sub>/LaFeO<sub>3</sub> sensor had a sensitivity for TEA that was 3.2 times higher than pure LaFeO<sub>3</sub> sensor. The optimized sensor operates at 140 °C and demonstrates strong stability, selectivity, and long-term durability. Detailed analyses revealed that the SnS<sub>2</sub> nanosheets enhanced oxygen vacancy (O<sub>V</sub>) content and carrier mobility through heterojunction formation with LaFeO<sub>3</sub>. This study provides insights into improving gas-sensing performance via p-n heterostructure design and proposes a novel LaFeO<sub>3</sub>-based material for TEA detection. |
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| ISSN: | 2227-9040 |