Adsorption Property of CS and COF on Nitrogen-Doped Anatase TiO(101) Surfaces: A DFT Study.

SF has been utilized widely as an electrical insulation medium because of its excellent arc extinguishing performance and insulation characteristics. In this paper, the adsorption property of two kinds of key SF carbon-containing decomposition components (CS and COF) on nitrogen-doped anatase TiO(101) (N-TiO) surfaces was simulated and analyzed based on density functional theory. The results demonstrated that N-TiO shows good gas sensitivity toward CS with the increase of conductivity but is insensitive toward COF. In addition, the gas-sensing property of CS on N-TiO is stronger than that of COF. This work provides the theoretical information on such a gas-sensitive material for key SF carbon-containing decomposition components, supporting its utilization as a chemical sensor applied in condition monitoring and defect diagnosis in SF gas-insulated equipment based on decomposition component analysis.