Ternary metal oxides containing two different metal cations are highly promising candidates for sensor materials due to their intriguing properties. Herein, we report on the application of CoSnO₃ nanoboxes with a porous structure as a sensing layer for highly sensitive detection of triethylamine at a relatively low temperature. The CoSnO₃ nanoboxes are obtained by calcination of CoSn(OH)₆ precursors derived from a solution precipitation method. The dosage of cobalt is found to strongly influence the structure of the products and the sensing properties. The morphological structure and chemical composition of the materials are investigated in detail by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N₂ adsorption–desorption and X-ray photoelectron spectroscopy. Gas sensing measurements demonstrate that the CoSnO₃ nanoboxes exhibit a p-type response and can efficiently detect triethylamine at a low temperature of 100 °C with a limit of detection of 134 ppb. The gas sensing mechanism is discussed by the modulation of a hole accumulation layer (HAL) on the adsorption of gas molecules.

中文翻译：

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具有p型响应的敏感CoSnO3纳米盒可在低温下检测三乙胺

包含两种不同金属阳离子的三元金属氧化物因其令人着迷的特性而成为传感器材料的极有希望的候选者。在此，我们报道了具有多孔结构的CoSnO ₃纳米盒作为传感层的应用，该传感层用于在相对较低的温度下高灵敏度地检测三乙胺。通过煅烧源自溶液沉淀法的CoSn（OH）₆前驱体获得CoSnO ₃纳米盒。发现钴的用量会强烈影响产品的结构和感测性能。通过X射线衍射，扫描电子显微镜，透射电子显微镜，N ₂对材料的形态结构和化学组成进行了详细研究。吸附-解吸和X射线光电子能谱。气敏测量表明，CoSnO ₃纳米盒表现出p型响应，并且可以在100°C的低温下有效检测三乙胺，检测限为134 ppb。通过在气体分子吸附上调制空穴累积层（HAL）来讨论气体传感机理。