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Fabrication of Sm-doped porous In2O3 nanotubes and their excellent formaldehyde-sensing properties

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Abstract

Pure and Sm-doped In2O3 porous nanotubes have been successfully fabricated by the single-capillary electrospinning method followed by calcination. The as-synthesized porous nanotubes were investigated by X-ray powder diffraction (XRD), energy-dispersive X-ray (EDX), scanning electron microscope (SEM), Raman spectra and X-ray photoelectron spectroscopy (XPS). It can be seen in SEM images that the surface of nanotubes is distributed with numerous pores. Gas sensing investigation reveals that Sm-doped In2O3 porous nanotubes possess high-performance formaldehyde sensing properties. The response of gas sensors based on Sm-doped In2O3 porous nanotubes was 54.37 towards 100 ppm formaldehyde at 240 °C, which was 5 times larger than that of pure In2O3 porous nanotubes (10.87). The response and recovery times to 100 ppm formaldehyde were 9 and 40 s, respectively. Moreover, even at low concentration of 100 ppb formaldehyde, a detectable response of 2.1 can be observed. Furthermore, Sm-doped In2O3 porous nanotube gas sensors have excellent selectivity to formaldehyde.

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Acknowledgments

The work has been supported by the Jilin Provincial Science and Technology Department (No. 20140204027GX).

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Authors and Affiliations

  1. College of Electronic Science and Engineering, Jilin University, 130012, Changchun, People’s Republic of China

    Changbai Liu & Shengping Ruan

  2. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, 130012, Changchun, People’s Republic of China

    Xuesong Wang & Li Liu

  3. College of Environment and Resources, Jilin University, 130012, Changchun, People’s Republic of China

    Feng Xie

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  1. Changbai Liu
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  2. Xuesong Wang
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  4. Li Liu
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Correspondence to Li Liu.

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Liu, C., Wang, X., Xie, F. et al. Fabrication of Sm-doped porous In2O3 nanotubes and their excellent formaldehyde-sensing properties. J Mater Sci: Mater Electron 27, 9870–9876 (2016). https://doi.org/10.1007/s10854-016-5055-7

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