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Open AccessArticle

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

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. https://doi.org/10.3390/s17081822

AMA Style

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(8):1822. https://doi.org/10.3390/s17081822

Chicago/Turabian Style

Du, Haiying; Yao, PengJun; Sun, Yanhui; Wang, Jing; Wang, Huisheng; Yu, Naisen. 2017. "Electrospinning Hetero-Nanofibers In2O3/SnO2 of Homotype Heterojunction with High Gas Sensing Activity" Sensors 17, no. 8: 1822. https://doi.org/10.3390/s17081822

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