First-principles calculations of adsorption sensitivity of Au-doped MoS2 gas sensor to main characteristic gases in oil
Source abstract
Abstract
Detecting oil-dissolved gases in transformer is crucial for internal discharge fault diagnosis. Methane (CH4), acetylene (C2H2), ethylene (C2H4), ethane (C2H6) are some of the important fault characteristic gases in oil-immersed transformer discharge faults. The concentration and production rate can effectively reflect the insulation performance of oil-paper power transformer. In order to realize the effective detection of gases in the oil, the Au atom-doped MoS2 (Au-MoS2) monolayer was proposed. To study adsorption properties of different gases, the density functional theory (DFT) was used to study applicability of Au-MoS2 two-dimensional (2D) nanomaterials for gas sensor. Meanwhile, the adsorption properties, sensitivity and electronic behavior were calculated. The results show that the doped systems have a better sensing performance for C2H2, C2H4 and C2H6. And Au-MoS2 monolayer has a unique response to C2H2 with appropriate adsorption energy (− 1.056 eV) and charge transfer (0.252 e), which are far more than CH4 (− 0.065 eV, 0.037 e). Based on the above data, Au-MoS2 monolayer has selectivity for different oil-dissolved gases.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Diamond and Carbon-based Materials Research · High voltage insulation and dielectric phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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