275 / 2021-11-08 16:26:13

Adsorption and Sensing Properties of Dissolved gas in oil on Cr-doped InN Monolayer: A Density Functional Theory Study

DFT, DGA, InN monolayer, Adsorption, Gas sensors

High voltage and insulation technology > Sensing, monitoring and diagnostics

Dissolved gases analysis (DGA) is recognized to be one of the most reliable methods in transformer fault diagnosis technology. In this paper, three kinds of characteristic gases dissolved in oil (CO, C₂H₄ and CH₄) were tried to approach Cr decorated InN monolayer based on Density functional theory (DFT) calculations. The adsorption properties of Cr-InN for these three kinds of gases were studied by analysis methods such as adsorption structure, adsorption energy, electron density, density of state and energy band structure. The results show that the Cr-InN monolayer has a good adsorption capacity for CO and C₂H₄ while the band gap of the monolayer changed slightly after the adsorption of CO and C₂H₄. Besides, the adsorption property of Cr-InN monolayer on CH₄ is acceptable and a significant response is generated at the same time. This paper can provide a first insight to evaluate the perspective of Cr doped InN monolayer to detect gases dissolved in oil.