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Ultra-sensitive and selective acetone gas sensor with fast response at low temperature based on Cu-doped α-Fe2O3 porous nanotubes

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Abstract

In the present work, the acetone gas sensing material based on pure α-Fe2O3 nanotubes, pure and Cu-doped α-Fe2O3 porous nanotubes were fabricated by electrospinning and annealing processes. Different Cu dopant concentrations are introduced to investigate the dopant’s role in sensing performance. The structures and chemical compositions of the as-prepared products were examined using a series of material characterization methods including XRD, EDS, SEM and nitrogen adsorption–desorption analysis. And the acetone sensing results demonstrate that the gas sensitivity of porous nanotubes is better than nanotubes. Moreover, compared with pure samples, the sensor based on 3.0 wt% Cu-doped α-Fe2O3 porous nanotubes exhibits higher response (99.43/100 ppm) and excellent selectivity towards acetone at 164 °C. Meanwhile, the detection limit can extend down to ppb level (2.2/100 ppb). Additionally, the sensor also shows fast response and recovery time (5/18 s) and good repeatability to acetone. The enhancement of gas sensitivity is ascribed to not only the effective utility of hollow and porous structures, but also the high catalytic activity of the Cu additive.

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Acknowledgements

The work was supported the Jilin Provincial Science and Technology Department (No. 20170101199JC).

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Authors and Affiliations

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

    Yali Cheng, Yue He, Shuo Li, Yu Li, Haiying Li & Li Liu

  2. Colleges of Mechanical Science and Engineering, Jilin University, Changchun, 130012, People’s Republic of China

    Yifang Wang

  3. School of Life Sciences, Jilin University, Changchun, 130012, People’s Republic of China

    Yan Zhao

Authors
  1. Yali Cheng
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  2. Yue He
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  3. Shuo Li
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  4. Yifang Wang
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  5. Yan Zhao
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  6. Yu Li
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  7. Haiying Li
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  8. Li Liu
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Correspondence to Li Liu.

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Cheng, Y., He, Y., Li, S. et al. Ultra-sensitive and selective acetone gas sensor with fast response at low temperature based on Cu-doped α-Fe2O3 porous nanotubes. J Mater Sci: Mater Electron 29, 11178–11186 (2018). https://doi.org/10.1007/s10854-018-9203-0

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  • DOI: https://doi.org/10.1007/s10854-018-9203-0

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