Three dimensional (3D) porous nanostructures assembled by low-dimensional nanomaterials are widely applied in gas sensor according to porous structure which can facilitate the transport of gas molecules. In this work, fish-scale-like porous SnO₂ nanomaterials assembled from ultrathin nanosheets with thickness of 16.8 nm were synthesized by a facile hydrothermal route. Then Ag nanoparticles were decorated on the surface of SnO₂ nanosheets via one-step method to improve their gas-sensing performances. The sensing properties of pristine SnO₂ and Ag/SnO₂ nanosheets were investigated intensively. After decorating with Ag nanoparticles, the characteristics of SnO₂ based sensor for triethylamine detection were significantly improved. Especially, the Ag/SnO₂ based sensor with Ag content of 2 at% exhibited the highest triethylamine sensing sensitivity at optimum work temperature of 170 °C. The improved sensing properties of Ag/SnO₂ sensors were attributed to the sensitizing actions of Ag nanoparticles as well as the unique hierarchical porous architecture.

由低维纳米材料组装而成的三维（3D）多孔纳米结构根据多孔结构可促进气体分子的传输，广泛应用于气体传感器。在这项工作中，通过简便的水热路线合成了由厚度为16.8 nm的超薄纳米片组装而成的鱼鳞状多孔SnO _{2纳米材料。}然后通过一步法将Ag纳米颗粒修饰在SnO _{2纳米片的表面以提高其气敏性能。}对原始SnO ₂和Ag/SnO ₂纳米片的传感特性进行了深入研究。用Ag纳米粒子装饰后，SnO _2的特性基于传感器的三乙胺检测得到显着改善。特别是Ag含量为2 at%的Ag/SnO ₂基传感器在170 ℃的最佳工作温度下表现出最高的三乙胺传感灵敏度。Ag/SnO ₂传感器的改进传感特性归因于Ag纳米颗粒的敏化作用以及独特的分层多孔结构。