Adsorption mechanism and electronic characteristics of TiO2, (TiO2)2 nanoparticles doped GaNNT for SOF2, SO2F2 and SO2 detection and scavenging

Insulation faults in SF 6 -based high-voltage insulation equipment are accompanied by SF 6 decomposition, hence electrical equipment insulation condition monitoring is vital. The first principles calculations are used to investigate the adsorption and electronic characteristics of TiO 2 -GaNNT (Gall...

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Published in:IEEE transactions on dielectrics and electrical insulation 2023-06, Vol.30 (3), p.1-1
Main Authors: Sang, Tian-Yi, Li, Tao, Yang, Yihao, Hu, Xiqian, Wang, Ziyi, Yang, Zhuang, Zhang, Xinyuan, Song, Yuxuan, Wang, Changding, Chen, Weigen
Format: Article
Language:English
Subjects:
Adsorption
Chemicals
Condition monitoring
Decomposition
Density functional theory
Desorption
Electric equipment
Electrical insulation
Electronic properties
Fault detection
Fault diagnosis
First principles
Gallium nitrides
Gas detection and scavenging
Gas sensors
Gases
High-voltage techniques
Monitoring
Nanoparticles
Nanotubes
Recovery time
Scavenging
SF<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">6 decomposed species
Sulfur dioxide
Sulfur hexafluoride
TiO<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">2 /(TiO<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">2 )<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">2 doping
Titanium dioxide
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Summary:Insulation faults in SF 6 -based high-voltage insulation equipment are accompanied by SF 6 decomposition, hence electrical equipment insulation condition monitoring is vital. The first principles calculations are used to investigate the adsorption and electronic characteristics of TiO 2 -GaNNT (Gallium Nitride Nanotubes) and (TiO 2 ) 2 -GaNNT. TiO 2 and (TiO 2 ) 2 are firstly applied for the adsorption of SF 6 decomposition species (SO 2 F 2 , SOF 2 , SO 2 ) with the most stable structures binding energies of -10.077 eV and -10.663 eV, respectively. Through comparing the adsorption energy and electronic characteristics of SO 2 F 2 , SOF 2 , and SO 2 on TiO 2 -GaNNT and (TiO 2 ) 2 -GaNNT, these results indicate that TiO 2 -GaNNT and (TiO 2 ) 2 -GaNNT are appropriate sensing materials for SF 6 decomposition products. Furthermore, (TiO 2 ) 2 -GaNNT has good desorption recovery time (1.527s) for SOF 2 at a specific temperature, and the mode of physical adsorption offers a prominent basis for its desorption as a gas sensor. The results demonstrate that TiO 2 and (TiO 2 ) 2 can be employed as a novel gas sensitive material for SF 6 decomposition species detection, scavenging and diagnosis in the insulation faults of SF 6 -based electrical equipment.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2023.3241259