Hierarchical composites of MoS2 nanoflower anchored on SnO2 nanofiber for methane sensing

In this paper, we present the synthesis of novel three-dimensional SnO2/MoS2 nanocomposites via electrospinning combined with a hydrothermal method and their application to CH4 gas detection. Morphological characterization proved that the flower-like MoS2 structures were successfully connected to the surface of porous SnO2 nanofibers. The CH4 gas-sensing test results indicated that the gas-sensing properties of SnO2/MoS2 nanocomposites were better than those of pure MoS2; the SnO2/MoS2 nanocomposites exhibited lower optimal operation temperature and higher gas response. Such excellent performance is mainly attributable to the special hierarchical structure and the existence of n-n junctions between SnO2 and MoS2.