Nanomaterials‐based gas sensors of SF ₆ decomposed species for evaluating the operation status of high‐voltage insulation devices

Abstract

In recent years, many novel sensing nanomaterials were explored experimentally and theoretically as chemical gas sensors to detect sulphur hexafluoride (SF 6) decomposed species with rapid response, high sensitivity and selectivity, as well as low cost, in order to estimate and guarantee the operation status of SF 6 insulation devices. However, there has been no systemic review yet to comprehensively understand their sensing mechanism and conclude their sensing application. Such kinds of nanomaterials include traditional carbon-based materials such as carbon nanotube and graphene, metal oxides such as SnO 2 , ZnO and TiO 2 , transition metal dichalcogenides such as MoS 2 monolayer and MoTe 2 monolayer as well as graphene-like InN monolayer. A systemic review would be significant to give a profound insight into the exploration of nanomaterial-based chemical gas sensors in the field of electrical engineering and to help youth scholars first stepping in this field rapidly master the progress inside. Thus, the authors attempt to complete this review here. They are hopeful that this review could provide some guidance to fulfil such purpose in the near future, and it would be full of perspective to explore more novel nanomaterials as defect indicators in SF 6 insulated devices. Furthermore, it is their hope that this review could broaden the sensing application of admirable nanomaterials in many fields such as environmental monitoring and pollutant scavenging.

First-Principles Study of Au-Doped InN Monolayer as Adsorbent and Gas Sensing Material for SF6 Decomposed Species

“…Besides, the charge transfer (Q T ) during the doping and adsorption process is analyzed through the Hirshfeld method [ 41 ]. A positive value of Q T implies that the analyte acts as an electron donator, and conversely implies that the analyte acts as an electron acceptor [ 42 ].…”

Interactions of C5F10O Molecule With Cu (1 1 0) and (1 0 0) Surfaces Based on Density Functional Theory

“…Sulfur hexafluoride (SF6) has been applied as an insulation medium in the electrical engineering for a long time due to its extraordinary insulating and arc-extinguishing performances [1][2][3] . However, SF6 is quite a strong greenhouse gas with the Global Warming Potential (GWP) value up to 23500 and has an atmospheric lifetime of 3200 years [4] .…”

Study on Pyrolysis Characteristics of SF6 in a Trace-Oxygen (O2) Environment: ReaxFFSFO Force Field Optimization and Reactive Molecular Dynamics Simulation

“…The stable oxygen-containing byproducts produced are mainly SOF 4 , SOF 2 , SO 2 F 2 , etc., which are consistent with the results in the literature. 4 Besides, it is found that among the oxygen-containing sulfur-fluoride compounds generated in the system, the content of (SOF 3 )* is more than that of SOF 2 , and only a small amount of SOF 4 is present.…”