Abstract
Acetylene (C2H2) gas sensors were developed by synthesizing a reduced graphene oxide (rGO)-loaded SnO2 hybrid nanocomposite via a facile two-step hydrothermal method. Morphological characterizations showed the formation of well-dispersed SnO2 nanoparticles loaded on the rGO sheets with excellent transparency and obvious fold boundary. Structural analysis revealed good agreement with the standard crystalline phases of SnO2 and rGO. Gas sensing characteristics of the synthesized materials were carried out in a temperature range of 100–300 °C with various concentrations of C2H2 gas. At 180 °C, the SnO2–rGO hybrid showed preferable detection of C2H2 with high sensor response (12.4 toward 50 ppm), fast response-recovery time (54 s and 23 s), limit of detection (LOD) of 1.3 ppm and good linearity, with good selectivity and long-term stability. Furthermore, the possible gas sensing mechanism of the SnO2–rGO nanocomposites for C2H2 gas were summarized and discussed in detail. Our work indicates that the addition of rGO would be effective in enhancing the sensing properties of metal oxide-based gas sensors for C2H2 and may make a contribution to the development of an excellent ppm-level gas sensor for on-line monitoring of dissolved C2H2 gas in transformer oil.
Highlights
Condition monitoring and fault diagnosis is crucial in ensuring the long-term safe and stable operation of power transformers
Thesamples samples must characterized before the measurement gas sensing performance to
This paper demonstrated a high performance C2 H2 gas sensor based on a SnO2 –reduced graphene oxide (rGO)
Summary
Condition monitoring and fault diagnosis is crucial in ensuring the long-term safe and stable operation of power transformers. Latent faults in the power transformer in early stages can be found by monitoring the operation state of the insulation system, which mainly consists of oil and paper [1]. The occurrence of incipient thermal or discharge faults cause the C-H and C-C bond cleavage of oil-paper insulation system, leading to the formation of various dissolved gases, such as H2 , CH4 , C2 H6 , C2 H4 and C2 H2 [2]. Acetylene (C2 H2 ) is a colorless combustible hydrocarbon It is the simplest alkyne, with a distinctive odor. It is widely used as a fuel and in many other industrial applications. It is an important raw material for organic
Sign-in/Register to view highlights & summary 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.
