The Sensing Properties of Single Y-Doped SnO₂ Nanobelt Device to Acetone

Pure SnO₂ and Y-doped SnO₂ nanobelts were prepared by thermal evaporation at 1350 °C in the presence of Ar carrier gas (30 sccm). The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersion spectrometer (EDS), X-ray photoelectron spectrometer (XPS), UV-Vis absorption spectroscopy, Raman spectroscopy, and Fourier transform infrared spectrum (FTIR). The sensing properties of the devices based on a single SnO₂ nanobelt and Y-doped SnO₂ nanobelt were explored to acetone, ethanol, and ethanediol. It reveals that the sensitivity of single Y-doped SnO₂ nanobelt device is 11.4 to 100 ppm of acetone at 210 °C, which is the highest response among the three tested VOC gases. Y³⁺ ions improve the sensitivity of SnO₂ sensor and have an influence on the optical properties of Y-doped SnO₂ nanobelts.