Comparison of the enhanced gas sensing properties of tin dioxide samples doped with different catalytic transition elements

Journal of Colloid and Interface Science
Fuchao Yang, Zhiguang Guo

Abstract

In this work, non-doped SnO2 samples, and SnO2 samples doped with Zn(II), Cu(II), or Mn(II), having hierarchical microstructures, were prepared using an otherwise identical hydrothermal process, followed by annealing. The morphological and structural characteristics of the samples were systematically characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) measurements, and X-ray photoelectron spectroscopy (XPS). Ten gas sensors were constructed from each material, and compared as to detection of gas-phase ethanol, acetone, glacial acetic acid, methanol, and ammonia. The results indicated, for example, that SnO2 containing 2.91% Mn dopant exhibited a 2.5-fold higher gas detection response toward ethanol at 100 ppm than that of the non-doped material. The fastest response time for 100 ppm ethanol was found for Cu(II)-doped SnO2 (9.7 s), compared with 12.4 s for non-doped SnO2. Graphs of sensor response versus operating temperature for SnO2 containing different types and quantities of dopant exhibited quite different morphologies. The gas-sensing mechanism appears to involve reactions between the detected gases and th...Continue Reading

References

Jan 12, 2011·Journal of Colloid and Interface Science·Ji-yan LengTong Zhang
Jun 20, 2013·Journal of Colloid and Interface Science·Tengfei JiangDejun Wang
Oct 23, 2013·Journal of Colloid and Interface Science·Guoxing ZhuJinglei Yang
Jul 10, 2014·ACS Applied Materials & Interfaces·Chen WangNoboru Yamazoe
Aug 5, 2014·Journal of Colloid and Interface Science·T Senthil, S Anandhan

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Citations

Jan 25, 2016·Journal of Colloid and Interface Science·Fuchao Yang, Zhiguang Guo
Oct 11, 2015·Journal of Colloid and Interface Science·Fuchao Yang, Zhiguang Guo
Jun 9, 2017·Nanotechnology·Vicinisvarri InderanHooi Ling Lee

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