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Sensors 2017, 17(8), 1822; https://doi.org/10.3390/s17081822

Electrospinning Hetero-Nanofibers In2O3/SnO2 of Homotype Heterojunction with High Gas Sensing Activity

1
College of mechanical and Electronic Engineering, Dalian Minzu University, Dalian 116600, China
2
School of Electronic Science and Technology, Dalian University of Technology, Dalian 116023, China
3
Department of Electrical and Computer Engineering, College of Engineering, Iowa State University, Ames, IA 50011, USA
4
School of Educational Technology, Shenyang Normal University, Shenyang 110034, China
5
School of Physics and Materials Engineering, Dalian Minzu University, Dalian 116600, China
*
Author to whom correspondence should be addressed.
Received: 2 July 2017 / Revised: 3 August 2017 / Accepted: 3 August 2017 / Published: 9 August 2017
(This article belongs to the Special Issue Gas Sensors based on Semiconducting Metal Oxides)
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Abstract

In2O3/SnO2 composite hetero-nanofibers were synthesized by an electrospinning technique for detecting indoor volatile organic gases. The physical and chemical properties of In2O3/SnO2 hetero-nanofibers were characterized and analyzed by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), Energy Dispersive X-Ray Spectroscopy (EDX), specific surface Brunauer–Emmett–Teller (BET) and X-ray photoelectron spectroscopy (XPS). Gas sensing properties of In2O3/SnO2 composite hetero-nanofibers were measured with six kinds of indoor volatile organic gases in concentration range of 0.5~50 ppm at the operating temperature of 275 °C. The In2O3/SnO2 composite hetero-nanofibers sensor exhibited good formaldehyde sensing properties, which would be attributed to the formation of n-n homotype heterojunction in the In2O3/SnO2 composite hetero-nanofibers. Finally, the sensing mechanism of the In2O3/SnO2 composite hetero-nanofibers was analyzed based on the energy-band principle. View Full-Text
Keywords: electrospinning; composite hetero-nanofibers; homotype heterojunction; indoor volatile organic gases; gas sensing properties; gas sensing mechanism electrospinning; composite hetero-nanofibers; homotype heterojunction; indoor volatile organic gases; gas sensing properties; gas sensing mechanism
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Du, H.; Yao, P.; Sun, Y.; Wang, J.; Wang, H.; Yu, N. Electrospinning Hetero-Nanofibers In2O3/SnO2 of Homotype Heterojunction with High Gas Sensing Activity. Sensors 2017, 17, 1822.

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