Abstract
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.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-016-1685-1) contains supplementary material, which is available to authorized users.
Highlights
With the development of science and technology as well as people’s increasing concerns for the environment, considerable attentions are paid to efficiently and precisely detect and supervise flammable, explosive, or poisonous gases [1].As a transparent n-type semiconductor with a band gap of 3.6 eV, SnO2 can be used as photoelectric devices, sensors, catalysts, and other functional materials [2]
The morphology, microstructures, and composition of YSnO2 NBs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive Xray spectroscopy (EDS), transmission electron microscopy (TEM), UV-Vis absorption spectra, Raman spectra, Fourier transform infrared spectrum (FTIR), and high-resolution transmission electron microscopy (HRTEM)
HRTEM image of a Y-SnO2 NB is displayed in Fig. 2c and the
Summary
As a transparent n-type semiconductor with a band gap of 3.6 eV, SnO2 can be used as photoelectric devices, sensors, catalysts, and other functional materials [2]. Various methods were developed to synthesize nanostructured SnO2 materials, such as the sol-gel method, liquid precursor method [4], electroplating tin thermal oxidation method [5], and chemical vapor deposition (CVD) method [6]. Synthesis of 1D nanostructured SnO2 materials has made great achievements [7, 8]. SnO2 with various morphologies such as nanoparticle, nanowire, nanosilk, nanosawtooth, nanobelt, or nanotube are obtained by the abovementioned methods [9,10,11], which can be used as building blocks for functional devices [12, 13]
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