title: Gas sensitivity and sensing mechanism studies on Au-doped TiO₂ nanotube arrays for detecting SF₆ decomposed components.
abstract: The analysis to SF6 decomposed component gases is an efficient diagnostic approach to detect the partial discharge in gas-insulated switchgear (GIS) for the purpose of accessing the operating state of power equipment. This paper applied the Au-doped TiO2 nanotube array sensor (Au-TiO2 NTAs) to detect SF6 decomposed components. The electrochemical constant potential method was adopted in the Au-TiO2 NTAs' fabrication, and a series of experiments were conducted to test the characteristic SF6 decomposed gases for a thorough investigation of sensing performances. The sensing characteristic curves of intrinsic and Au-doped TiO2 NTAs were compared to study the mechanism of the gas sensing response. The results indicated that the doped Au could change the TiO2 nanotube arrays' performances of gas sensing selectivity in SF6 decomposed components, as well as reducing the working temperature of TiO2 NTAs.
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. xiaoxing.zhang@outlook.com.
authors.forename: Xiaoxing
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. elaine@cqu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. cherrytie0123@hotmail.com.
authors.forename: Jing
authors.initials: J
authors.lastname: Tie
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. D.xc_cqu@outlook.com.
authors.forename: Xingchen
authors.initials: X
authors.lastname: Dong
mesh_terms: D055664:Electrochemical Techniques; D005740:Gases / Q000737:chemistry / Q000302:isolation & purification*; D006046:Gold / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D013459:Sulfur Hexafluoride / Q000737:chemistry / Q000302:isolation & purification*; D013696:Temperature; D014025:Titanium / Q000737:chemistry
chemical_list: D005740:Gases; C009495:titanium dioxide; D006046:Gold; D014025:Titanium; D013459:Sulfur Hexafluoride