In this work, Zn₂SnO₄ microstructures functionalized with PdO nanoparticles were successfully synthesized combination a facile one-step hydrothermal method and subsequent wet impregnation treatment. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and selected-area electron diffraction (SAED) were employed to obtain the crystalline and morphological characterization of the as-prepared products. The results demonstrated that the morphology of the final Zn₂SnO₄ samples have uniform octahedral structure. Interestingly, the surface of Zn₂SnO₄ octahedrons was assembled by nanosheets with the assistant of CTAB. In addition, gas-sensing properties of the as-prepared Zn₂SnO₄ octahedrons before and after functionalization with PdO nanoparticles were systematically investigated. Compared with pure Zn₂SnO₄, the sensor based on 2 wt% PdO-loaded Zn₂SnO₄ octahedrons exhibited obviously enhanced gas sensing properties toward ethanol. The response value was 82.3 toward 100 ppm ethanol, which was almost five times higher than that of pure Zn₂SnO₄. The novel structure of Zn₂SnO₄ octahedrons and the catalytic effect of PdO nanoparticles were believed to be the main reason of the enhancement of gas sensing characteristics.

在这项工作中，成功地结合了一种简便的一步水热法和随后的湿法浸渍处理，成功地合成了用PdO纳米粒子官能化的Zn ₂ SnO ₄微观结构。使用X射线衍射（XRD），场发射扫描电子显微镜（FESEM），透射电子显微镜（TEM）和选择区域电子衍射（SAED）来获得所制备产品的结晶和形态表征。结果表明最终Zn ₂ SnO ₄样品的形态具有均匀的八面体结构。有趣的是，Zn ₂ SnO ₄的表面八面体在CTAB的帮助下由纳米片组装而成。此外，系统地研究了制备的Zn ₂ SnO ₄八面体在PdO纳米粒子官能化之前和之后的气敏特性。与纯Zn ₂ SnO ₄相比，基于2 wt％负载PdO的Zn ₂ SnO ₄八面体的传感器表现出明显增强的对乙醇的气敏特性。对100 ppm乙醇的响应值为82.3，几乎是纯Zn ₂ SnO ₄的响应值的五倍。Zn ₂ SnO ₄的新颖结构 八面体和PdO纳米颗粒的催化作用被认为是增强气体传感特性的主要原因。