$$\hbox {ZrO}_{2}$$ nanopowder has been synthesized by the conventional precipitation method for gas-sensing application. The synthesized powder was dropcast and subsequently annealed at $$100^{\circ }\hbox {C}$$. The drop-casted film has been subjected to X-ray diffraction analysis, scanning electron microscopy, ultraviolet–visible diffuse reflectance spectroscopy, photoluminescence study and I–V measurement in order to observe its structural, morphological, optical and electrical properties. The gas sensing measurement has been performed for the thus prepared $$\hbox {ZrO}_{2}$$ film by an exposure to different reducing gases (ammonia, ethanol, formaldehyde, acetone and xylene) at different temperatures for various gas concentrations. It has been observed that the film shows a better response towards ammonia (about 18%) compared to all other gases due to faster diffusion. Also, a quick response and recovery time have been found as 70 and 70 s, respectively, for ammonia.

中文翻译：

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用于气体传感应用的 $$\hbox {ZrO}_{2}$$ZrO2 纳米结构的合成

$$\hbox {ZrO}_{2}$$ 纳米粉末已通过常规沉淀法合成用于气敏应用。合成的粉末被滴铸并随后在 $$100^{\circ}\hbox {C}$$ 下退火。对滴铸薄膜进行了 X 射线衍射分析、扫描电子显微镜、紫外-可见漫反射光谱、光致发光研究和 I-V 测量，以观察其结构、形态、光学和电学特性。通过在不同气体浓度下在不同温度下暴露于不同还原气体（氨、乙醇、甲醛、丙酮和二甲苯），对如此制备的 $$\hbox {ZrO}_{2}$$ 薄膜进行了气敏测量. 已经观察到，与所有其他气体相比，由于更快的扩散，薄膜对氨的响应更好（约 18%）。此外，已发现氨的快速响应和恢复时间分别为 70 和 70 秒。