二氧化钛纳米管气体传感器检测SF_6的气体分解组分SO_2F_2的气敏特性  

TiO_2 Nanotube Array Sensor for Detecting SF_6 Decomposition Component SO_2F_2

作　　者：张晓星[1] 吴法清 铁静[1] 熊浩[3] 蒋浩[3] 唐炬[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]湖北省洪湖市电业有限公司,洪湖434000 [3]重庆市电力公司检修分公司,重庆400039

出　　处：《高电压技术》2014年第11期3396-3402,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724506);创新研究群体科学基金(51321063);国家自然科学基金(51277188)~~

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。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.

关 键 词：TIO2纳米管阵列 SF6分解 SO2F2气体 脉冲电流沉积法 PT掺杂 气敏响应 

分 类 号：TM595[电气工程—电器]