Abstract
Hollow structured nanofibers have attracted much attention in diverse domains owing to their unique physicochemical properties and characteristics. Gas sensing is one of the most promising applications. In electrical engineering, the detection of SF6 decomposing gas products is significant to monitor the insulation status online of gas insulated switchgear (GIS). This mini-review presents the developments of hollow structured nanofibers in synthesis strategies and gas sensing application, especially in the detection of SF6 decomposing gas products, including hydrogen disulfide (H2S), sulfur dioxide (SO2), thionyl fluoride (SOF2), and sulfuryl fluoride (SO2F2). In addition, the gas sensing mechanism of metal oxide hollow nanofibers based gas sensor are discussed.
Highlights
Sulfur hexafluoride (SF6) as an insulating gas is commonly utilized in gas insulated switchgear (GIS) (Zhang et al, 2018a)
In the part of this mini review, we focus on the gas sensing application, especially the SF6 decomposing gas products
Various gas sensors based on hollow nanofibers materials with ultrahigh response value and low detection limit have been applied to gas detection
Summary
Sulfur hexafluoride (SF6) as an insulating gas is commonly utilized in gas insulated switchgear (GIS) (Zhang et al, 2018a). Synthesis strategies of novel hollow nanofibers and their gas sensing application, especially detecting SF6 decomposing gas products, are introduced. Template synthesis, self-assembly, and electrospinning technique have been employed for producing the hollow structured nanofibers (Khajavi and Abbasipour, 2012; Wang and Lu, 2012; Kim et al, 2019).
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