Oxygen vacancies-contained SnO2SnO2 nanotubes with enhanced ethanol gas sensing properties
Abstract
SnO2SnO2 porous nanotubes containing oxygen vacancies were prepared by electron spinning and H plasma treatment. The morphology and crystal structure of the samples were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The ethanol-sensing properties of the SnO2SnO2 sensor were tested. The results show that the samples treated with H plasma for 20 min have the best performance. Its working temperature is 230∘230∘C lower than 290∘290∘C of the original sample, with a sensitivity of 17 at 100 ppm, which is seven times higher than the original sample. It also shows good selectivity to some common interfering gases. This enhancement can be ascribed to the introduced oxygen vacancy. This work provides an efficient way to design high-performance gas sensor materials.
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