Pure SnO₂, SnO₂/NiO, and Au-loaded SnO₂/NiO hollow spheres with different Au content were synthesized through a 1-step hydrothermal synthesis. The surface morphology and structural as well as chemical composition of the synthesized Au-loaded SnO₂/NiO hollow spheres were carefully investigated. The performance of the pure SnO₂, SnO₂/NiO, and Au-loaded SnO₂/NiO gas sensors in the detection of low concentrations of propanol (C₃H₇OH) and ethanol (C₂H₅OH) was evaluated. The as-fabricated Au (2.5 wt. %)-loaded SnO₂/NiO gas sensors demonstrated enhanced gas sensing characteristics and were highly sensitive, selective, and stable to C₂H₅OH vapor at a low operating temperature of 75 °C, whereas an improved response to C₃H₇OH was observed at 150 °C. The results indicated that compared to pure SnO₂ and SnO₂/NiO, the Au-loaded SnO₂/NiO hollow sphere-based sensor exhibited a significant improvement in the gas sensing response at a lower optimum operating temperature. The long-term stability analyses indicated that the Au (2.5 wt. %)-loaded SnO₂/NiO sensor was stable even after 35 days. These findings clearly demonstrated the ability of a 2.5 wt. % Au-loaded SnO₂/NiO gas sensor to detect C₂H₅OH and C₃H₇OH vapors by adjusting the operating temperature suitably.

通过一步水热法合成了纯金的SnO ₂，SnO ₂ / NiO和载金量不同的Au含量的SnO ₂ / NiO中空球。仔细研究了合成的Au负载SnO ₂ / NiO空心球的表面形貌，结构及化学组成。评估了纯SnO ₂，SnO ₂ / NiO和载有Au的SnO ₂ / NiO气体传感器在检测低浓度丙醇（C ₃ H ₇ OH）和乙醇（C ₂ H ₅ OH）中的性能。制成的Au（2.5 wt。％）负载SnO ₂/ NiO气体传感器显示出增强的气体传感特性，并且在75°C的低工作温度下对C ₂ H ₅ OH蒸气具有高灵敏度，选择性和稳定性，而在150° C时观察到对C ₃ H ₇ OH的响应有所改善C。结果表明，与纯SnO ₂和SnO ₂ / NiO相比，Au负载SnO ₂ / NiO中空球基传感器在较低的最佳工作温度下显示出显着的气体传感响应改善。长期稳定性分析表明，Au（2.5 wt。％）负载的SnO ₂/ NiO传感器即使在35天后仍保持稳定。这些发现清楚地证明了2.5wt。％的能力。％Au负载SnO ₂ / NiO气体传感器，通过适当调节操作温度来检测C ₂ H ₅ OH和C ₃ H ₇ OH蒸气。