In this paper, micro-flowers self-assembled by nanoplates were prepared by simple hydrothermal method for gas sensing application. The micro-flower-like morphology of the as-synthesized V₂O₅ sample has been confirmed by FESEM and TEM micrographs. The structural property investigation of the prepared V₂O₅ sample has been carried out by XRD and Raman studies. The XRD pattern of V₂O₅ micro-flower unveiled the pure and poly crystalline orthorhombic phase and Raman analysis revealed the layered like structure of V₂O₅ micro-flower. In addition, SAED pattern further confirmed the poly crystalline nature of the prepared sample. Further, the micro-flower structure was compressed into pellet form and the gas sensing behavior of these pellets has been tested for different target gases. The sensing results showed the better selectivity and sensitivity for trace amount of the NO₂ gas at an optimum operating temperature of 200 °C

本文采用简单的水热法制备了由纳米板自组装的微花，用于气体传感。合成的V ₂ O ₅样品的微花状形态已经通过FESEM和TEM显微照片得到了证实。通过XRD和拉曼研究对制备的V ₂ O ₅样品进行了结构性能研究。V ₂ O ₅微花的XRD图谱揭示了纯的多晶正交相，拉曼分析显示了V ₂ O ₅的层状结构微花。另外，SAED图进一步证实了所制备样品的多晶性质。此外，将微花结构压缩成颗粒形式，并针对不同的目标气体测试了这些颗粒的气体传感行为。传感结果表明，在最佳工作温度200°C下，对痕量NO ₂气体具有更好的选择性和灵敏度。