纳米晶体调控的基于阻抗谱的氨气传感技术
Nanocrystal tuned ammonia gas sensing technique via impedance spectroscopy
AI总结：
本研究通过水热法合成Ce-Cu掺杂WO3纳米结构，利用阻抗谱技术，显著提升了氨气传感的热稳定性和选择性，为半导体气体传感器性能优化提供了新途径。
摘要：
氨气是一种有害的化学危险品，因其在工业中的广泛使用而闻名。接触氨气可导致环境破坏、人类健康危害和巨大的经济损失。因此，氨气传感器对于检测氨气泄漏、避免严重意外伤害和死亡至关重要。在本研究中，我们通过水热法合成了掺杂稀土元素-过渡金属（Ce-Cu）的纳米结构（WO3）n型金属氧化物半导体，用于氨气传感应用。使用XRD和FESEM进行了结构分析。此外，我们通过紫外-可见光谱、FTIR和PL研究了光学性质。我们发现，与纯WO3相比，（Ce-Cu）的掺杂在宽频率范围内显著提高了氨气检测的热稳定性和选择性性能。我们相信这些研究将为探索使用Ce-Cu改善半导体基气体传感器的气敏性能铺平道路。
英文摘要：
Ammonia is a harmful chemical hazard known for its widespread industrial use. Exposure to ammonia can cause environmental damage, human health hazards, and huge economic losses. Therefore, ammonia gas sensors are essential for detecting ammonia leaks to avoid serious accidental injury and death. In this study, we synthesize a nanostructured (WO3) n-type metal oxide semiconductor doped with a rare earth element-transition metal (Ce-Cu) via hydrothermal method for ammonia gas sensing application. Structural analysis was performed using XRD and FESEM. Further we investigate the optical properties via UV-visible spectroscopy, FTIR, and PL. We found that doping of (Ce-Cu) led to significant improvement in thermal stability for ammonia detection and selectivity performance compared to that pure one, across a wide frequency range. We believe that these studies will pave the way for exploring the use of Ce-Cu to improve the gas sensing properties of semiconductor-based gas sensors.
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