Atomic defects can enhance catalytic efficiency by providing coordinatively unsaturated sites in the crystal structure of metal oxides. It allows facile chemical reactions because the sites can react with other molecules with relatively lower energy. Therefore, atomic defect engineering can be a cost-effective strategy to replace novel metal catalysts for the development of ultrasensitive gas sensors. Herein, we fabricated porous ZnO nanobelts with atomic step structures for acetone, ethanol, and isoprene gas sensing under the parts-per-billion (ppb) level. Numerous atomic step structures could be formed by removing H and F atoms during the conversion process of ZnOHF at 500°C. The synthesis method of metal oxide nanomaterial by conversion from metal hydroxide fluoride will provide the atomic defects and it will be useful to prepare ultrasensitive sensing material. Furthermore, the gas selectivity of the porous ZnO nanobelt was investigated based on the appearance energy associated with the separation of the methyl group.

中文翻译：

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使用多孔 ZnO 纳米带检测 ppb 级以下呼气中的主要 VOC

原子缺陷可以通过在金属氧化物的晶体结构中提供配位不饱和位点来提高催化效率。它允许容易的化学反应，因为这些位点可以以相对较低的能量与其他分子反应。因此，原子缺陷工程可以成为替代新型金属催化剂以开发超灵敏气体传感器的一种具有成本效益的策略。在此，我们制造了具有原子阶梯结构的多孔 ZnO 纳米带，用于十亿分之一 (ppb) 水平下的丙酮、乙醇和异戊二烯气体传感。在 500°C 的 ZnOHF 转化过程中，通过去除 H 和 F 原子可以形成许多原子台阶结构。金属氢氧化物氟化物转化合成金属氧化物纳米材料的方法将提供原子缺陷，可用于制备超灵敏传感材料。此外，基于与甲基分离相关的出现能量研究了多孔 ZnO 纳米带的气体选择性。