Yan Jingyi, Dai Weiju, Zou Dexu, Sun Haoruo, Tang Chao, Gui Yingang
Electric Power Research Institute of Yunnan Power Grid, Kunming 650214, China.
College of Engineering and Technology, Southwest University, Chongqing 400716, China.
Nanomaterials (Basel). 2025 Jun 3;15(11):856. doi: 10.3390/nano15110856.
The gas adsorption and sensing properties of a transition metal oxide (TMO)-ZnO heterojunction-based sensor for H, CO, and CH are analyzed. It is found that CuO, AgO, and CuO stably composite onto the surface of ZnO by forming heterojunctions, which helps to improve the gas sensing and selectivity of the sensor. The adsorption results show that CuO-ZnO shows physical adsorption for H and good gas sensing performance for CO and CH, while AgO-ZnO and CuO-ZnO have significant responses for H, CO, and CH. In addition, the introduction of the TMO-ZnO heterojunction structure can effectively avoid the sensor poisoning phenomenon, as the gas adsorption process does not destroy the original geometric configuration of the heterojunction. This study lays a theoretical foundation for preparing TMO-ZnO heterojunction-based sensors for transformer defect detection and energy efficiency analysis.
分析了一种基于过渡金属氧化物（TMO）-ZnO异质结的传感器对H、CO和CH的气体吸附及传感特性。发现CuO、AgO和CuO通过形成异质结稳定地复合在ZnO表面，这有助于提高传感器的气敏性和选择性。吸附结果表明，CuO-ZnO对H表现出物理吸附，对CO和CH具有良好的气敏性能，而AgO-ZnO和CuO-ZnO对H、CO和CH均有显著响应。此外，TMO-ZnO异质结结构的引入可有效避免传感器中毒现象，因为气体吸附过程不会破坏异质结的原始几何构型。该研究为制备用于变压器缺陷检测和能效分析的基于TMO-ZnO异质结的传感器奠定了理论基础。
