Abstract:
The reduced graphene oxide(rGO)/SnO
2 nanofibers were prepared via a simple electrospinning method.The effects of Ce doping and doping amount on the microstructure and sensing properties of rGO/SnO
2 nanofibers were studied. The morphology and structure of thenanofibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. It was found that Ce doping did not change the morphology and crystal structures of the nanofibers.Gas sensing results showed that different Ce doping could improve the sensitivity of rGO/SnO
2 nanofibers to H
2S. The composite had the best gas sensitivity to H
2S when the Ce doping mole fraction was 3%, at 75℃. The sensitivity of 5 μL/L H
2S gas was up to 300, and the selectivity and response recovery performance were also significantly improved.