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