Abstract
? 2022The SF6 gas in gas-insulated switchgear (GIS) systems decomposes into SO2F2, SOF2, SO2, and H2S under abnormal conditions such as partial discharge. The detection of these decomposition gases with high sensitivity is essential for the safe operation of GIS devices. Herein, we report the synthesis of cerium oxide and multiwalled carbon nanotube composite (CeO2@MWCNTs). The CeO2@MWCNTs composite was characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller analysis. The CeO2@MWCNTs composite sensor provided a response value of 7.7 at 100 ppm of SO2F2 at a low operating temperature (50 °C), and the response and recovery features of the CeO2@MWCNTs composite sensor were recorded at 43 and 28 s, respectively. Moreover, the composite sensor exhibited excellent stability after two months. The developed CeO2@MWCNTs composite sensor can offer an exceptional platform for gas sensing applications in diverse fields.
NSTL
Elsevier