J. Semicond. > 2016, Volume 37 > Issue 1 > 013005
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SEMICONDUCTOR MATERIALS

Excellent performance of gas sensor based on In2O3-Fe2O3 nanotubes

Li Liu, Shouchun Li, Xin Guo, Yue He and Lianyuan Wang

+ Author Affiliations

 Corresponding author: Liu Li,Email:liul99@jlu.edu.cn

DOI: 10.1088/1674-4926/37/1/013005

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Abstract: In2O3-Fe2O3 nanotubes are synthesized by an electrospinning method. The as-synthesized materials are characterized by scanning electron microscope and X-ray powder diffraction. The gas sensing results show that In2O3-Fe2O3 nanotubes exhibit excellent sensing properties to acetone and formaldehyde at different operating temperatures. The responses of gas sensors based on In2O3-Fe2O3 nanotubes to 100 ppm acetone and 100 ppm formaldehyde are 25 (240℃) and 15 (260℃), and the response/recovery times are 3/7 s and 4/7 s, respectively. The responses of In2O3-Fe2O3 nanotubes to 1 ppm acetone (240℃) and formaldehyde (260℃) are 3.5 and 1.8, respectively. Moreover, the gas sensor based on In2O3-Fe2O3 nanotubes also possesses an excellent selectivity to acetone and formaldehyde.

Key words: In2O3, Fe2O3, nanotube, gas sensor



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Fig. 1.  (Color online) Structure of gas sensor.

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Fig. 2.  XRD patterns of pure Fe2O3 nanotubes and In2O3–Fe2O3 nanotubes.

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Fig. 3.  SEM images of (a, b) pure Fe$_{2}$O$_{3}$ nanotubes and (c, d) In$_{2}$O$_{3}$–Fe$_{2}$O$_{3}$ nanotubes, respectively.

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Fig. 4.  TEM images of (a) pure Fe$_{2}$O$_{3}$ nanotubes and (b) In$_{2}$O$_{3}$–Fe$_{2}$O$_{3}$ nanotubes, respectively.

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Fig. 5.  Response of In$_{2}$O$_{3}$--Fe$_{2}$O$_{3}$ nanotubes and Fe2O3 nanotubes gas sensors to 100 ppm acetone and 100 ppm formaldehyde at different operating temperatures, respectively.

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Fig. 6.  Response and recovery curves of In$_{2}$O$_{3}$--Fe$_{2}$O$_{3}$ nanotubes and Fe$_{2}$O$_{3}$ nanotubes gas sensors to 100 ppm acetone (240 ℃) and 100 ppm formaldehyde (260 ℃), respectively.

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Fig. 7.  Responses of In$_{2}$O$_{3}$--Fe$_{2}$O$_{3}$ nanotubes and Fe$_{2}$O$_{3}$ nanotubes gas sensors to different concentrations of acetone (240 ℃) and formaldehyde (260 ℃) in the range of 1--200 ppm

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Fig. 8.  Response of In$_{2}$O$_{3}$--Fe$_{2}$O$_{3}$ nanotubes gas sensors to 100~ppm different gases at 240 ℃ and 260 ℃, respectively.

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    Received: 23 April 2015 Revised: Online: Published: 01 January 2016

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      Article Navigation >  Journal of Semiconductors  > 2016  >  37(1): 013005
      Li Liu, Shouchun Li, Xin Guo, Yue He, Lianyuan Wang. Excellent performance of gas sensor based on In2O3-Fe2O3 nanotubes[J]. Journal of Semiconductors, 2016, 37(1): 013005. doi: 10.1088/1674-4926/37/1/013005 ****L Liu, S C Li, X Guo, Y He, L Y Wang. Excellent performance of gas sensor based on In2O3-Fe2O3 nanotubes[J]. J. Semicond., 2016, 37(1): 013005. doi: 10.1088/1674-4926/37/1/013005.
      Citation:
      Li Liu, Shouchun Li, Xin Guo, Yue He, Lianyuan Wang. Excellent performance of gas sensor based on In2O3-Fe2O3 nanotubes[J]. Journal of Semiconductors, 2016, 37(1): 013005. doi: 10.1088/1674-4926/37/1/013005 ****
      L Liu, S C Li, X Guo, Y He, L Y Wang. Excellent performance of gas sensor based on In2O3-Fe2O3 nanotubes[J]. J. Semicond., 2016, 37(1): 013005. doi: 10.1088/1674-4926/37/1/013005.
      shu

      Excellent performance of gas sensor based on In2O3-Fe2O3 nanotubes

      DOI: 10.1088/1674-4926/37/1/013005

      • State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China

      Funds:

      Project supported by the Jilin Provincial Science and Technology Department (No. 20140204027GX).

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      • Corresponding author: Liu Li,Email:liul99@jlu.edu.cn
      • Received Date: 2015-04-23
      • Accepted Date: 2015-06-24
      • Published Date: 2016-01-25

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