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A Phase Separation Route to Synthesize α-Fe2O3 Porous Nanofibers via Electrospinning for Ultrafast Ethanol Sensing

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Abstract

A facile and economic procedure was provided to synthesize α-Fe2O3 nanofibers. In this procedure, porous α-Fe2O3 nanofibers were obtained by a single-polymer/binary-solvent system, while solid α-Fe2O3 nanofibers were prepared by a single-polymer/single-solvent system. The crystal structure and morphology of both samples were characterized by x-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption/desorption isotherms. The formation mechanism of porous structure was based on solvent evaporation-induced phase separation by the use of mixed solvents with different volatility. Furthermore, ethanol-sensing performance of the porous α-Fe2O3 nanofibers was evaluated and compared with solid α-Fe2O3 nanofibers. Results from gas-sensing measurements reveal that porous α-Fe2O3 nanofibers exhibit higher sensitivity and slightly longer recovery time than solid α-Fe2O3 nanofibers. Over all, the gas sensor based on porous α-Fe2O3 nanofibers shows excellent ethanol-sensing capability with high sensitivity and ultrafast response/recovery behaviors, indicating its potential application as a real-time monitoring gas sensor.

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Authors and Affiliations

  1. School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, 116034, China

    Shuwen Dong, Shuang Yan, Wenyuan Gao, Guishan Liu & Hongshun Hao

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  1. Shuwen Dong
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  2. Shuang Yan
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  3. Wenyuan Gao
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  4. Guishan Liu
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  5. Hongshun Hao
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Correspondence to Shuang Yan or Wenyuan Gao.

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Dong, S., Yan, S., Gao, W. et al. A Phase Separation Route to Synthesize α-Fe2O3 Porous Nanofibers via Electrospinning for Ultrafast Ethanol Sensing. J. Electron. Mater. 47, 3934–3941 (2018). https://doi.org/10.1007/s11664-018-6274-x

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  • DOI: https://doi.org/10.1007/s11664-018-6274-x

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