Abstract
The detection of the identities and concentrations of sulfur hexafluoride, SF6, decomposition products is important for evaluating the conditions of SF6-gas-insulated equipment. This study is a preliminary test of the use of cassiterite (110) for detecting SF6 and SF6 decomposition gases, including HF, H2S, SO2, SOF2, SO2F2, CF4, CO, and CO2. First-principles calculations were adopted to investigate the adsorption mechanism of SF6 decomposition gases on a cassiterite (110) surface, using adsorption energy, geometrical structure, frontier molecular orbitals, electron density, density of states, potential energy, and work functions. We found that the adsorption of H2S made a noticeable change in the electronic properties of the (110) surface. The adsorption of SO2 strongly influenced the charge distribution of the cassiterite (110) surface and made the greatest decrease in the work function of the nine gas molecules tested. Conversely, changes in the cassiterite's electronic properties induced by other gases, especially SF6, were slight. Therefore, cassiterite could be a promising candidate for highly selective and sensitive sensors to detect H2S and SO2 in SF6 decomposition gases.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
