Rare-earth ions (Pr3+, Dy3+, Y3+, Er3+, Lu3+) modified MoO3 quasi-core-shell nanorods for triethylamine monitor and fish decayed level assessment

作者：Xiang Zhao, Xianghui Zhang, Feng Li, Ying Yang, Tianqi Wang, Hui Yu, Duanduan Yin, Dan Li, Xiangting Dong · 发表于：Chemical Engineering Journal · 年份：2025 · DOI：10.1016/j.cej.2025.162690 · 被引用次数：33 · 研究领域：Analytical Chemistry and Sensors、Advanced Chemical Sensor Technologies、Gas Sensing Nanomaterials and Sensors

Triethylamine (TEA) is a poisonous organic gas that is typically found in spoiled or rotting seafood and is extremely harmful to humans and the environment. Thus, it is an urgent need to design a gas sensor for the detection of TEA. MoO 3 exhibits promising potential as a gas-sensitive material to detect TEA. To our knowledge, reports are relatively few on one-dimensional nanomaterials of rare earth (RE) element-doped MoO 3 for TEA gas sensors to improve sensing performance. Herein, MoO 3 :x%RE 3+ (RE 3+ = Pr 3+ , Dy 3+ , Y 3+ , Er 3+ , Lu 3+ ; x = 0, 0.5, 1, 3, 5) quasi-core-shell nanorods are successfully constructed by electrospinning and one-step calcined process. All samples have undergone transformation into gas sensors. After doping with RE ions, all MoO 3 :1%RE 3+ gas sensors exhibit higher response values to TEA than MoO 3 . MoO 3 :1%Pr 3+ quasi-core-shell nanorods gas sensor demonstrates superior gas-sensitizing properties, exhibiting a 12.3-fold increase compared with the response value of MoO 3 gas sensor, and extremely high selectivity, rapid response/recovery time, and prominent resistance to moisture. More importantly, the feasibility of MoO 3 :1%Pr 3+ quasi-core-shell nanorods gas sensor for seafood freshness assessment is verified via testing the amount of TEA produced by decaying seafood at different storage times under different storage temperature and humidity. The sensing mechanism of doping RE ions into MoO 3 is also proposed to improve the sensor perfor...