利用静电纺丝法制备了氧化钨(WO_3)纳米纤维。使用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对样品的物相结构和微观形貌进行表征。分析结果表明:制备的WO_3纳米纤维由众多纳米颗粒组装而成,且平均直径约为200 nm。同时,研究了基于WO_3纳米纤维的气体传感器对H_2S的气敏特性。实验结果表明:在工作温度为150℃时,该传感器对体积分数为2×10~(-5)的H_2S气体的响应达到72,响应时间和恢复时间分别为4 s和21 s,且检测极限为5×10~(-9),表明该传感器在低体积分数H_2S气体检测方面有实际应用价值。 Tungsten oxide (WO_3) nanofibers were prepared by electrospinning. The phase structure and the morphology of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the prepared WO_3 nanofibers are assembled by a large number of nanoparticles with an average diameter of about 200 nm. At the same time, the gas sensing properties of H_2S based on WO_3 nanofiber gas sensors were studied. The experimental results show that the sensor responds to H 2 S gas with a volume fraction of 2 × 10 -5 at a working temperature of 150 ℃, and the response time and recovery time are 4 s and 21 s, respectively, and the detection limit Is 5 × 10 ~ (-9), indicating that the sensor has practical application value in low volume fraction H_2S gas detection.