Room-Temperature-Operated Fe2O3/PANI-Based Flexible and Eco-Friendly Ammonia Sensor With Sub-ppm Detectability

IF 2.2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Ajay Beniwal;Rahul Gond;Xenofon Karagiorgis;Brajesh Rawat;Chong Li
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引用次数: 0

Abstract

In this letter, a room temperature (RT) (∼27 °C) operated ferric oxide/polyaniline (Fe2O3/PANI) composite-based flexible ammonia sensor with substantial sensing performance is reported. Initially, interdigitated electrodes were screen printed (using graphene-carbon-based ink) on a bio-degradable paper substrate. Further, PANI nanofibers were electrospun on printed IDEs, followed by drop casting a layer of Fe2O3. X-ray diffraction and Fourier transform infrared spectroscopy studies were performed to confirm the composite formation, followed by scanning electron microscopy analysis to examine the sensing surface morphology. The ammonia sensing performance was examined within the range of 0.5 ppm (i.e., 500 ppb) to 50 ppm, with a 1.99% response achieved even at 0.5 ppm. The response/recovery times were noted as 950/250 s toward 0.5 ppm of ammonia. In addition, selectivity toward interference gases including carbon dioxide, nitrogen dioxide, carbon monoxide, and sulfur dioxide was also investigated. The proposed sensing mechanism of the composite material toward ammonia gas detection is also presented.
室温工作Fe2O3/ pani基柔性环保亚ppm检测氨传感器
在这封信中,报告了一种室温(RT)(~ 27°C)操作的氧化铁/聚苯胺(Fe2O3/PANI)复合材料柔性氨传感器,具有良好的传感性能。最初,交叉电极被丝网印刷(使用石墨烯碳基油墨)在可生物降解的纸基上。进一步,在印刷ide上电纺聚苯胺纳米纤维,然后滴铸一层Fe2O3。通过x射线衍射和傅里叶变换红外光谱研究来确认复合材料的形成,然后通过扫描电子显微镜分析来检查传感表面的形貌。在0.5 ppm(即500 ppb)至50 ppm的范围内测试了氨传感性能,即使在0.5 ppm时也实现了1.99%的响应。对0.5 ppm的氨,响应/恢复时间为950/250秒。此外,对干扰气体包括二氧化碳、二氧化氮、一氧化碳和二氧化硫的选择性也进行了研究。提出了该复合材料对氨气检测的传感机理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
IEEE Sensors Letters
IEEE Sensors Letters Engineering-Electrical and Electronic Engineering
CiteScore
3.50
自引率
7.10%
发文量
194
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