Most of the reported ternary oxides based sensors have not been realized to detect ppb-level H₂S till now. In this work, Zn₂SnO₄ hierarchical quasi-microspheres were prepared through a facile surfactant-free hydrothermal method followed by calcination in air atmosphere. The quasi-microspheres are composed of nanosheets with the thickness of 100 nm and octahedra with the average size of 0.63 μm, respectively. The sensor fabricated from such Zn₂SnO₄ hierarchical quasi-microspheres shows excellent selective response to H₂S at 133 °C with the lowest detection limit of 1 ppb. The gas response exhibits good linear relationship in the concentration range of 1~1000 ppb. Such outstanding H₂S sensing property might be attributed to its porous structure, the synergistic effect of the two typical building blocks and the surface adsorbed oxygen, and the possible sensing mechanism is also discussed.

大多数的报道三元系氧化物传感器尚未实现检测ppb的水平面H ₂小号到现在。在这项工作中，通过一种简便的无表面活性剂水热法，然后在大气中煅烧，制备了Zn ₂ SnO ₄分层准微球。准微球由厚度为100 nm的纳米片和平均尺寸为0.63μm的八面体组成。由这种Zn ₂ SnO ₄分层准微球制成的传感器在133°C下对H ₂ S表现出出色的选择性响应，最低检测限为1 ppb。在1〜1000 ppb的浓度范围内，气体响应具有良好的线性关系。如此出色的H₂ S的传感特性可能归因于其多孔结构，两种典型构件与表面吸附氧的协同效应，并探讨了可能的传感机理。