A Phase Separation Route to Synthesize α-Fe2O3 Porous Nanofibers via Electrospinning for Ultrafast Ethanol Sensing
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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.
Keywordsα-Fe2O3 nanofibers porous phase separation ethanol sensing ultrafast response/recovery
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- 21.N. D. Hoa, N. V. Duy, S. A. El-Safty and N. V. Hieu, J. Nanomater. 14 (2015).Google Scholar
- 32.Y. Wu, Y. Jiang, J. Shi, L. Gu, and Y. Yu, Small 13, 8 (2017).Google Scholar
- 39.D.P. Li, B.B. Zhang, J.C. Xu, Y.B. Han, H.X. Jin, D.F. Jin, X.L. Peng, H.L. Ge, and X.Q. Wang, Nanotechnology 27, 6 (2016).Google Scholar