Abstract:
Sulfur hexafluoride (SF6) decomposition occurs under extreme working conditions (high temperature and high pressure), which affects the insulation efficiency of high-volt...Show MoreMetadata
Abstract:
Sulfur hexafluoride (SF6) decomposition occurs under extreme working conditions (high temperature and high pressure), which affects the insulation efficiency of high-voltage insulating equipment. The application of the semiconductor-metal compound gas-sensitive detection method of SF6 decomposed products (SO2, SOF2, SO2F2, HF, and H2S) is an important means for high-sensitivity online monitoring and scavenging. In this study, the adsorption properties and electronic behaviors of transition metal Zn and Rh atoms modified S vacancy Tin sulfide (SnS) monolayer are investigated based on density functional theory. The results show that Zn and Rh atoms can be reliably doped at the S vacancy of SnS monolayers, and the band structure is optimized with the completion of the modified process. The modification of Zn and Rh atoms can effectively enhance the adsorption performance and the energy distributions of the lowest unoccupied molecular orbital (LUMO)-highest occupied molecular orbital (HOMO) and the work function (WF) are significantly improved. The modified SnS-based gas-sensitive materials have the same order of adsorption capacity for five gases under vacuum and water environments (SO2F2 > SOF2 > SO2 > H2S>HF). Thus, X-SnS (X = Rh, Zn) gas-sensitive materials can be used as effective gas sensors or adsorbents for different target gas molecules and improve the selectivity in gas adsorption, which can then be applied to high-voltage insulating devices or new power systems.
Published in: IEEE Sensors Journal ( Volume: 24, Issue: 24, 15 December 2024)