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High sensing properties of Ce-doped α-Fe2O3nanotubes to acetone

Authors
Journal
Ceramics International
0272-8842
Publisher
Elsevier
Volume
40
Issue
1
Identifiers
DOI: 10.1016/j.ceramint.2013.08.011
Keywords
  • Acetone
  • α-Fe2O3
  • Ce
  • Gas Sensor
  • Nanotubes

Abstract

Abstract Pristine and Ce-doped (3, 4, 5at% Ce) α-Fe2O3 nanotubes were synthesized by electrospinning method. The morphologies and structures of these samples were characterized by scanning electron microscope (SEM) and X-ray powder diffraction (XRD). The gas sensing properties of the four samples were investigated. The results showed that the sensitivity of the 4at% Ce-doped α-Fe2O3 nanotubes reached 21.5–50ppm acetone at 240°C, which was about 8.3 times larger than that of pure α-Fe2O3 nanotubes. Meantime, the response and recovery times were about 3 and 8s, respectively. The sensitivity of the lowest detecting limit to 1ppm acetone was about 3. Moreover, the sensor also possessed the good selectivity and long-term stability to acetone.

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