Chemical byproducts analysis have been recognized as a powerful diagnosis method for SF 6 gas‐insulated switchgear (GIS). Tin dioxide/multiwall carbon nanotubes (SnO 2 /MWCNTs) nanaocomposite was synthesized by a wet chemical method at room temperature, from which highly sensitive H 2 S sensors that can operate at room temperature were fabricated. The samples' morphology and structure were characterized by field emission scanning electron microscope (FE‐SEM), transmission electron microscopy (TEM), and X‐ray diffraction (XRD). The formation mechanism of SnO 2 /MWCNTs was analyzed. The results showed SnO 2 was successfully incorporated on the carbon nanotubes and the sensor can detect the concentration of H 2 S down to the 20 ppm level at room temperature.
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Hongfa et al. (2011) studied this question.
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