Nature Communications ( IF 14.7 ) Pub Date : 2023-06-13 , DOI: 10.1038/s41467-023-39213-x
Hong Zhang 1 , Zuobin Zhang 1 , Zhou Li 1 , Hongjie Han 1 , Weiguo Song 1 , Jianxin Yi 1
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Highly efficient gas sensors able to detect and identify hazardous gases are crucial for numerous applications. Array of conventional single-output sensors is currently limited by problems including drift, large size, and high cost. Here, we report a sensor with multiple chemiresistive and potentiometric outputs for discriminative gas detection. Such sensor is applicable to a wide range of semiconducting electrodes and solid electrolytes, which allows to tailor and optimize the sensing pattern by tuning the material combination and conditions. The sensor performance is boosted by equipping a mixed-conducting perovskite electrode with reverse potentiometric polarity. A conceptual sensor with dual sensitive electrodes achieves superior three-dimensional (sub)ppm sensing and discrimination of humidity and seven hazardous gases (2-Ethylhexanol, ethanol, acetone, toluene, ammonia, carbon monoxide, and nitrogen dioxide), and enables accurate and early warning of fire hazards. Our findings offer possibilities to design simple, compact, inexpensive, and highly efficient multivariate gas sensors.
中文翻译:
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一种用于鉴别气体检测的化学电阻电位多元传感器
能够检测和识别有害气体的高效气体传感器对于众多应用至关重要。传统的单输出传感器阵列目前存在漂移、尺寸大和成本高等问题。在这里,我们报告了一种具有多个化学电阻和电位输出的传感器,用于判别气体检测。这种传感器适用于范围广泛的半导体电极和固体电解质,可以通过调整材料组合和条件来定制和优化传感模式。通过配备具有反向电位极性的混合导电钙钛矿电极来提高传感器性能。具有双敏感电极的概念传感器可实现卓越的三维(亚)ppm 湿度和七种有害气体(2-乙基己醇,乙醇、丙酮、甲苯、氨、一氧化碳和二氧化氮),并能够准确和早期预警火灾隐患。我们的发现为设计简单、紧凑、廉价且高效的多变量气体传感器提供了可能性。