Abstract
Graphene and its hybrid materials, due to their unique structures and properties, have attracted enormous attention for both fundamental and applied research in the gas sensing field. This review highlights the recent advances in the application of graphene-based gas sensors in fault characteristic gas detection of oil-immersed equipment, which can effectively achieve condition monitoring of the oil-immersed power equipment. In this review, the synthetic methods of graphene hybrid materials with noble metals, metal oxides and their combination are presented. Then, the basic sensing mechanisms of graphene hybrid materials and gas sensing properties of graphene hybrid materials sensors to hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), acetylene (C2H2), ethylene (C2H4), and ethane (C2H6), which are the fault characteristic gas in oil-immersed power equipment, are summarized. Finally, the future challenges and prospects of graphene hybrid materials gas sensors in this field are discussed.
Highlights
Graphene is an allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal lattice, which was rediscovered, isolated, and characterized by Geim and Novoselov in 2004 (Novoselov et al, 2004; Geim and Novoselov, 2007)
There have been numerous works published on the basic research and the sensing applications of graphene and graphene hybrid materials
The objective of this review is to provide researchers a systematic understanding of the development of graphene hybrid materials in this application field
Summary
Graphene is an allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal lattice, which was rediscovered, isolated, and characterized by Geim and Novoselov in 2004 (Novoselov et al, 2004; Geim and Novoselov, 2007). Owing to the unique structure, graphene exhibits excellent physical and chemical properties, and has opened a new and very promising scientific area with a lot of focus on material science and potential applications (Aïssa et al, 2015; Higgins et al, 2016; Long et al, 2018). Among these outstanding properties of graphene, the high electron mobility of up to 200,000 cm2/Vs and superior specific surface area of 2,630 m2/g make graphene an extremely sensitive material for gas detection (Akturk and Goldsman, 2008; Chen et al, 2008; Bonaccorso et al, 2015). There have been numerous works published on the basic research and the sensing applications of graphene and graphene hybrid materials
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