Preparation and Application of TiO2 Nanotube Array Gas Sensor for SF6-Insulated Equipment Detection: a Review.
Preparation and Application of TiO2 Nanotube Array Gas Sensor for SF6-Insulated Equipment Detection: a Review.
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DOI：
10.1186/s11671-016-1516-4
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发表时间：
2016-12
影响因子：
--
通讯作者：
Dong X
中科院分区：
文献类型：
--
作者：
Zhang X;Gui Y;Dong X
自1999年Zwilling等人首次推出电化学阳极氧化法制备TiO2纳米管以来，因其优异的气体响应性和选择性而吸引了大量的研究，使其广泛应用于气体检测领域。本文介绍了TiO2纳米管阵列（TNTA）传感器在六氟化硫（SF6）绝缘设备中的应用，通过检测SF6的典型分解产物：二氧化硫（SO2）、亚硫酰氟（SOF2）和硫酰氟（SO2F2）来评估和诊断SF6绝缘设备的绝缘状态。首先讨论了 TiO2 纳米管的合成和传感性能。然后，讨论了对典型SF6分解产物SO2、SOF2和SO2F2的理论传感，从分子水平分析了传感机理。最后根据实验观察到的电阻变化，给出了纯TiO2纳米管传感器和改性TiO2纳米管传感器对SO2、SOF2和SO2F2的气体响应。
Since Zwilling and co-workers first introduced the electrochemical anodization method to prepare TiO2 nanotubes in 1999, it has attracted a lot of researches due to its outstanding gas response and selectivity, making it widely used in gas detection field. This review presents an introduction to the sensor applications of TiO2 nanotube arrays (TNTAs) in sulfur hexafluoride (SF6)-insulated equipment, which is used to evaluate and diagnose the insulation status of SF6-insulated equipment by detecting their typical decomposition products of SF6: sulfur dioxide (SO2), thionyl fluoride (SOF2), and sulfuryl fluoride (SO2F2). The synthesis and sensing properties of TiO2 nanotubes are discussed first. Then, it is followed by discussing the theoretical sensing to the typical SF6 decomposition products, SO2, SOF2, and SO2F2, which analyzes the sensing mechanism at the molecular level. Finally, the gas response of pure and modified TiO2 nanotubes sensor to SO2, SOF2, and SO2F2 is provided according to the change of resistance in experimental observation.