Role of cobalt in Co-ZnO nanoflower gas sensors for the detection of low concentration of VOCs
Role of cobalt in Co-ZnO nanoflower gas sensors for the detection of low concentration of VOCs
复制标题
钴在 Co-ZnO 纳米花气体传感器中检测低浓度 VOC 的作用
DOI：
10.1016/j.snb.2022.131674
复制
发表时间：
2022-03
期刊：
影响因子：
--
通讯作者：
Marc Debliquy
中科院分区：
文献类型：
--
作者：
Yi-Fan Luo;Ahmadou Ly;Driss Lahem;Justin D.M. Martin;Anne-Claude Romain;Chao Zhang;Marc Debliquy
呼吸分析作为一种无创的检测方法，用于肺癌的诊断一直是医学界研究的热点。使用电子鼻来实现呼吸分析是一种流行的选择。本文制备了对低浓度挥发性有机化合物具有高响应的钴氧化锌传感器作为肺癌诊断的电子鼻传感器。采用湿化学法制备Co-ZnO样品，焙烧后滴涂在带有金交叉电极的氧化铝基体上。采用SEM/EDX、XRD、FT-IR和XPS对合成材料进行了表征，观察了样品的微观结构、晶相和Co原子的电子态。这些传感器在不同温度下使用人工呼吸对各种挥发性有机化合物进行了测试。同时对传感器的稳定性进行了测试。不同Co2+添加量的传感器显示出不同的最佳温度和目标气体。传感性能的提高可以解释为传感层中Co的不同相。
As a non-invasive detection method, breath analysis for the diagnosis of lung cancer has been a hotspot in the medical field. Using an electronic nose to achieve the breath analysis is a popular choice. Herein, cobalt-ZnO sensors which have high response to low concentration volatile organic compounds were fabricated as sensors in electronic noses for the diagnosis of lung cancer. The Co-ZnO samples were synthesized via wet chemical method and drop coated onto the alumina substrates equipped with gold interdigitated electrodes after calcination. The as-synthesized materials were characterized by SEM/EDX, XRD, FT-IR and XPS to observe their microstructure, crystal phase, and electronic state of Co atom in the samples. The sensors were tested with various VOCs at different temperatures using artificial breath. At the same time, the stability of the sensor was tested. The sensor showed different optimal temperatures and target gas with different amounts of Co2+addition. The improvement in the sensing performance could be explained by the different phases of Co in the sensing layers.
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