中文摘要：

由于设备绝缘缺陷,在GIS内部存在不同程度的局部放电现象,会导致SF6气体分解,出现事故隐患。为了防止事故的发生,提出了一种用TiO2纳米管阵列检测SO2F2这种SF6局部放电分解产物的重要特征组分的方法,来实现设备的在线监测。通过阳极氧化法制备了定向生长、高度有序的本征TiO2纳米管阵列,另采用电化学脉冲沉积法在本征TiO2纳米管阵列表面掺杂Pt纳米颗粒制作了Pt掺杂TiO2纳米管阵列。分别用这两种阵列的传感器对体积分数为30×10^-6-100×10^-6 SO2F2气体进行了气敏响应试验。试验结果表明,两种传感器对SO2F2气体有不同的响应,且在掺杂Pt纳米粒子之后不仅灵敏度提高,而且工作温度下降。

英文摘要：

In gas insulated switching gears（GISs）, the inevitable intrinsic defects cause partial discharges（PD） and hence SF6 gas decomposition, which may further induce accidents. In order to prevent accidents, we proposed a method that used TiO2 nanotube array sensor to detect SO2F2, a characteristic component of SF6 degradation, for the on-line monitoring of GIS. We prepared sensors with two kinds of arrays, namely, the directionally grown and highly ordered TiO2 nanotube array, which was made by the anodic oxidation method, and the Pt nanoparticle doped TiO2 nanotube array, in which Pt was added into the TiO2 nanotube array by using the electrochemical pulse deposition method. We tested the two kinds of sensors＇ response to SO2F2 of 30×10^-6-100×10^-6. The test results show that the two sensors＇ responses to SO2F2 gas are different, and the Pt nanoparticle doping improves the sensor＇s sensitivity and lowers its working temperature.