Hollow cubic assembled nanocrystal Zn₂SnO₄ was synthesized via one-step hydrothermal method for VOC gas sensing applications. The obtained Zn₂SnO₄ materials had a uniformly hollow cubic structure with an average size of approximately 1 μm and a wall thickness of about 150 nm formed from nanocrystals of around 14 nm. The X-ray absorption near-edge structure results showed no structural disorder and/or lattice damage around the Zn-absorbing atoms and the Zn oxidation state of 2+ in the host lattice of the hollow cubic Zn₂SnO₄. The gas sensing characteristics of the prepared Zn₂SnO₄ material were tested to C₃H₆O, C₂H₅OH, CH₃OH, NH₃, H₂, and CO at 350 °C–450 °C and results showed that the sensors exhibited a good response to acetone and ethanol gases. The highest response values were 47.80 for 125 ppm of acetone and 7.52 for 10 ppm of ethanol at 450 °C. The Zn₂SnO₄ hollow cubic sensor demonstrated high sensitivity and selectivity to acetone with good stability and a detection limit of 175 ppb. The VOC sensing mechanism of the hollow cubic Zn₂SnO₄-based sensor was also discussed. The findings indicated that hollow cubic Zn₂SnO₄ is a promising material for use in excellent VOC gas sensing application towards breath analysis.

通过一步水热法合成了空心立方组装纳米晶Zn ₂ SnO ₄，用于VOC气体传感。所获得的Zn ₂ SnO ₄材料具有由约14nm的纳米晶体形成的均匀中空的立方结构，其平均尺寸为约1μm，壁厚为约150nm。X射线吸收近边缘结构的结果表明，在中空立方Zn ₂ SnO ₄的主晶格中，Zn吸收原子周围没有结构紊乱和/或晶格破坏，并且2+的Zn氧化态没有变化。将制备的Zn ₂ SnO ₄材料的气敏特性测试到C ₃H ₆ O，C ₂ H ₅ OH，CH ₃ OH，NH ₃，H ₂和CO在350°C–450°C下显示，结果表明传感器对丙酮和乙醇气体表现出良好的响应。在450°C下，最高响应值为125 ppm的丙酮为47.80，乙醇为10 ppm的为7.52。Zn ₂ SnO ₄空心立方传感器显示出对丙酮的高灵敏度和选择性，具有良好的稳定性，检出限为175 ppb。还讨论了中空立方Zn ₂ SnO ₄基传感器的VOC传感机理。结果表明，空心立方Zn ₂ SnO ₄ 是有希望的材料，可用于呼吸分析的出色VOC气体传感应用中。