This paper introduces a high-efficiency CO gas sensor based on ZnO/SnSe₂ composite film. The rod-shaped SnSe₂ and polyhedral ZnO composite nanostructures were prepared by template sacrificial method and solvothermal method. The developed composite material was characterized by scanning X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and I-V testing methods, and its microstructure and composition were explored. Through comparative experiments, it was found that the response of ZnO/SnSe₂ was the highest when the loading rate of SnSe₂ is 25%, which was superior to pure ZnO and SnSe₂ sensors. The ZnO/SnSe₂ composite sensor showed excellent selectivity and good dynamic characteristics to CO at room temperature (RT). To further improve the performance of the prepared CO sensor, we studied the effect of ultraviolet (UV) light on the sensor, and the research concluded that UV light can improve the gas-sensing characteristics of the sensors. The possible CO sensing mechanism is related to the heterostructure between n-type SnSe₂ and n-type ZnO nanomaterials and the photoelectrons excited by UV light.

_{本文介绍了一种基于ZnO/SnSe 2}复合薄膜的高效CO气体传感器。采用模板牺牲法和溶剂热法制备了棒状SnSe _{2和多面体ZnO复合纳米结构。}采用扫描X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和IV测试方法对所研制的复合材料进行表征，并探究其微观结构和成分。通过对比实验发现，当SnSe 2 的负载率为25%时，ZnO/SnSe 2 的响应_最高，_优于纯ZnO和SnSe ₂传感器。ZnO/SnSe ₂复合传感器在室温 (RT) 下对 CO 表现出优异的选择性和良好的动态特性。为了进一步提高所制备的CO传感器的性能，我们研究了紫外（UV）光对传感器的影响，研究得出结论，紫外光可以改善传感器的气敏特性。可能的 CO 传感机制与 n 型 SnSe ₂和 n 型 ZnO 纳米材料之间的异质结构以及紫外光激发的光电子有关。