WO/FeO 基半导体气敏传感器的糖果状异质结纳米复合材料用于三乙胺检测。

Candy-like heterojunction nanocomposite of WO/FeO-based semiconductor gas sensor for the detection of triethylamine.

机构信息

Provincial Key Laboratory of Rural Energy Engineering in Yunnan, Yunnan Normal University, Kunming, 650500, China.

Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China.

出版信息

Mikrochim Acta. 2023 Mar 17;190(4):139. doi: 10.1007/s00604-023-05699-x.

DOI:10.1007/s00604-023-05699-x

PMID:36930336

Abstract

A highly efficient gas sensor for the detection of triethylamine based on candy-like WO/FeO nanocomposite was prepared. The control of morphology and sensing performance of n-n heterojunction WO/FeO nanocomposites were successfully achieved by the modulation of Fe element content. When the ratio of Fe to W is 0.4, the candy-like nanocomposite of WO/FeO with great performance is obtained. It is interesting that the candy-like nanocomposite of WO/FeO with a large specific surface area exhibits better selectivity and sensitivity for sensing TEA gases at a lower operating temperature (260 °C) compared with the gas sensor prepared by using WO alone. To verify the feasibility, the sensing mechanism was investigated and real sample tests were conducted and discussed. Finally, a TEA gas sensor with low limit of detection, short response/recovery time (15/162 s), and high sensitivity was developed. In addition, the prepared gas sensor has satisfactory stability and selectivity and has practical application value.

摘要

一种基于糖果状 WO/FeO 纳米复合物的高效三乙胺气体传感器被制备。通过控制 Fe 元素的含量，成功地实现了 n-n 异质结 WO/FeO 纳米复合物的形貌和传感性能的控制。当 Fe 与 W 的比例为 0.4 时，得到了性能优异的 WO/FeO 糖果状纳米复合物。有趣的是，与单独使用 WO 制备的气体传感器相比，具有大比表面积的 WO/FeO 糖果状纳米复合物在较低的工作温度（260°C）下对 TEA 气体表现出更好的选择性和灵敏度。为了验证其可行性，研究了传感机制，并进行了实际样品测试和讨论。最后，开发了一种具有低检测限、短响应/恢复时间（15/162 s）和高灵敏度的 TEA 气体传感器。此外，所制备的气体传感器具有令人满意的稳定性和选择性，具有实际应用价值。