Double-shell ZnO hollow microspheres prepared by template-free method for ethanol detection

作者：Bin Jiang, Wei Tao, Liupeng Zhao, Tianshuang Wang, Xiaomin Liu, Fangmeng Liu, Xu Yan, Yanfeng Sun, Geyu Lu, Peng Sun · 发表于：Sensors and Actuators B Chemical · 年份：2023 · DOI：10.1016/j.snb.2023.133626 · 被引用次数：29 · 研究领域：Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies、ZnO doping and properties

Oxide semiconductors with multi-shell hollow architecture are considered favorable candidates as sensing materials for applications in high-performance gas sensors. Herein, the solid, core-shell, and double-shell zinc oxide (ZnO) microspheres were successfully prepared via a facile template-free method. Compared with solid and core-shell spheres, the gas sensor based on double-shell sphere exhibited the highest response to 100 ppm ethanol at 275 °C (∼ 47.4), which was about 4.8-fold higher than that of the solid sphere (∼ 9.8) under the same conditions. Furthermore, the detection limit of the double-shell ZnO microsphere could reach 1 ppm. The enhancement mechanism of the ethanol gas-sensing performance was systematically discussed.