Detection of partial discharge and analysis of SF ₆ gas components in gas-insulated switchgear are important for diagnosis and operating state assessment of power equipment. The gas-sensing properties of the existing TiO2 nanotube (TiO ₂ NT) array-based and the Pt-doped TiO2NT-based sensors were investigated for the components of SF6 decomposition. Four sensors with different amounts of Pt-doped TiO2NTs are prepared using constant current method. The sensing responses of the sensors to the main decomposition gases of SF6 (i.e., SO ₂ , SOF ₂ and SO ₂ F ₂ ) are examined, and the gas-sensing characteristic curves are comparatively analyzed. In addition, the mechanisms of the sensitive responses are discussed. Results show that a higher doping amount of Pt benefits the detection of SO ₂ F ₂ , whereas a lower doping amount is suitable for detecting SO ₂ , which is similar with the capabilities of the intrinsic TiO ₂ NT sensor. Moreover, the working temperature of the Pt-doped TiO ₂ NT sensor is lower than that of the intrinsic TiO ₂ NT sensor.

#	Concept	H-Index	Publications	Citations
1	Engineering	2	2	56
2	Electrical Engineering	2	2	56
3	Applied Physics	1	1	16
4	Chemical Engineering	1	1	40
5	Chemistry	1	1	40

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