Nanomaterials-based gas sensors of SF_(6)decomposed species for evaluating the operation status of high-voltage insulation devices

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.