▎ 摘　　要

In this paper, a high-performance sensor based on tin oxide modified reduced graphene oxide (SnO2-rGO) has been prepared via a one-step hydrothermal process for the detection of sulfur hexafluoride (SF6) decomposition components H2S and SOF2. The morphology and nanostructure of the product were characterized by X-ray diffraction (XRD), Raman spectroscopy (RS), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDS). The gas sensing properties of SnO2-rGO nanocomposite were investigated by exposing to various target gases. The experimental results revealed that SnO2-rGO sensor exhibited better responses (34.31% and -3.13%) than those (5.97% and -1.45%) of pristine rGO sensor at the optimal temperature of 125 degrees C in the presentence 100 ppm H2S and 10 ppm SOF2, respectively. Meanwhile, SnO2-rGO sensor emerged as one of the promising candidate materials to select these two gases by yielding opposite response to H2S and SOF2. In addition, uniformity, repeatability, long-term stability of SnO2-rGO sensors were investigated to demonstrate the practicability, and the possible mechanism of SnO2-rGO nanocomposite for sensing H2S and SOF2 was discussed. (C) 2018 Elsevier Ltd. All rights reserved.