Selectivity is still a major problem in gas sensors. In this study, we fabricated a novel sensor material, tin oxide (SnO₂) nanoparticle decorated tin selenide (SnSe) nanosheets (SnO₂/SnSe), via a simple solvothermal method. SnO₂ nanoparticles of size ∼10 nm were anchored on the surface of SnSe nanosheets. The gas-sensing performances of SnO₂/SnSe composites calcined at different temperatures were compared. Methylbenzene-sensing performance analysis performed at different temperatures and concentrations showed that SnO₂/SnSe composites exhibited preferable sensitivity, excellent selectivity, and a good response rate. The improved sensing properties, especially the selectivity, are attributed to the appropriate heterojunction of SnO₂ nanoparticle decorated SnSe nanosheets.

中文翻译：

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SnO2 纳米粒子修饰的 SnSe 纳米片的合成及其气敏特性

选择性仍然是气体传感器的主要问题。在这项研究中，我们通过简单的溶剂热法制造了一种新型传感器材料，氧化锡 (SnO ₂ ) 纳米颗粒装饰的硒化锡 (SnSe) 纳米片 (SnO ₂ /SnSe)。尺寸约为 10 nm 的SnO ₂纳米颗粒固定在 SnSe 纳米片的表面。比较了在不同温度下煅烧的SnO ₂ /SnSe复合材料的气敏性能。在不同温度和浓度下进行的甲苯传感性能分析表明，SnO ₂/SnSe 复合材料表现出较好的灵敏度、优异的选择性和良好的响应率。改进的传感特性，尤其是选择性，归因于 SnO ₂纳米颗粒装饰的 SnSe 纳米片的适当异质结。