In this work, hierarchical tetradecahedral SnO₂/Zn₂SnO₄ composites were synthesized by a simple one-pot method without using surfactants and templates and have a uniform diameter of ∼1 μm. Importantly, SnO₂/Zn₂SnO₄ was used to manufacture gas sensor. After testing the sensor, it displays good selectivity to ethanol and excellent repeatability at room temperature (RT). It has ultra-fast response/recovery times with 9 s and 7 s at 200 ppm ethanol, respectively. Such enhanced gas-sensing performances are probably ascribed to the unique hierarchical tetradecahedral SnO₂/Zn₂SnO₄ structure, the strong interfacial interaction and the existence of heterojunctions between Zn₂SnO₄ and SnO₂.

在这项工作中，不使用表面活性剂和模板，通过简单的一锅法合成了分层的十四面体SnO ₂ / Zn ₂ SnO ₄复合材料，其均匀直径约为1μm。重要的是，SnO ₂ / Zn ₂ SnO ₄用于制造气体传感器。对传感器进行测试后，它对乙醇具有很好的选择性，并且在室温（RT）下具有出色的重复性。在200 ppm乙醇中，它具有9 s和7 s的超快速响应/恢复时间。这种增强的气敏性能可能归因于独特的分层十四面体SnO ₂ / Zn ₂ SnO ₄Zn ₂ SnO ₄和SnO _2的结构，强界面相互作用和异质结的存在。