In this work, silver ferric oxide (AgFeO₂) nanoparticles have been successfully synthesized using the co-precipitation method and characterized with various techniques. Highly porous, grain-like AgFeO₂ nanoparticles were prepared. Furthermore, this work explores and for the first time proposes the possibility of using low-cost AgFeO₂ nanoparticles with a delafossite structure for the low-temperature detection of nitrogen dioxide (NO₂) gas. AgFeO₂ nanoparticle powder was characterized using X-ray diffraction (XRD). It discloses the delafossite structure indicating the presence of both rhombohedral and hexagonal structures having an average crystallite size of 47 nm. The field emission scanning electron microscopy (FE-SEM) and energy-dispersive spectroscopy (EDS) study give the idea about dense distribution nanoparticles and confirm the elemental composition of AgFeO₂, respectively. Transmission electron microscopy (TEM) shows that grain-like nanostructures have a particle size in the range of between 50 and 80 nm. The specific surface area was calculated by Brunauer–Emmett–Teller (BET), and it was found to be 31.9353 ± 0.1551 m²/g. It is found that the AgFeO₂ gas sensor shows high selectivity to words NO₂ gas at 8 ppm gas concentration at an operating temperature of 50 °C.

在这项工作中，采用共沉淀法成功合成了银氧化铁（AgFeO ₂ ）纳米粒子，并通过各种技术进行了表征。制备了高度多孔、颗粒状的 AgFeO ₂ 纳米粒子。此外，这项工作探索并首次提出了使用具有铜铁矿结构的低成本AgFeO ₂ 纳米粒子用于低温检测二氧化氮（NO ₂ ）的可能性气体。 AgFeO ₂ 纳米颗粒粉末采用 X 射线衍射 (XRD) 进行表征。其公开了铜铁矿结构，表明存在平均微晶尺寸为47nm的菱形和六方结构。场发射扫描电子显微镜（FE-SEM）和能量色散光谱（EDS）研究分别给出了纳米粒子致密分布的想法并确认了AgFeO ₂ 的元素组成。透射电子显微镜 (TEM) 显示粒状纳米结构的粒径在 50 至 80 nm 之间。通过Brunauer-Emmett-Teller (BET)计算比表面积，结果为31.9353±0.1551 m ² /g。结果发现，AgFeO ₂ 气体传感器在50℃的工作温度下，对气体浓度为8ppm的NO ₂ 气体表现出较高的选择性。