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Appl. Sci. 2017, 7(1), 19; doi:10.3390/app7010019

Characterization of Reduced Graphene Oxide (rGO)-Loaded SnO2 Nanocomposite and Applications in C2H2 Gas Detection

1,2,* , 1,2
,
1,2
,
1,2
,
1,2
and
1,3
1
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
2
School of Electrical Engineering, Chongqing University, Chongqing 400044, China
3
College of Engineering and Technology, Southwest University, Chongqing 400715, China
*
Author to whom correspondence should be addressed.
Academic Editor: Volodymyr Khranovskyy
Received: 31 October 2016 / Revised: 4 December 2016 / Accepted: 17 December 2016 / Published: 23 December 2016
(This article belongs to the Special Issue Metal Oxide Nanostructures)
View Full-Text   |   Download PDF [4449 KB, uploaded 23 December 2016]   |  

Abstract

Acetylene (C2H2) gas sensors were developed by synthesizing a reduced graphene oxide (rGO)-loaded SnO2 hybrid nanocomposite via a facile two-step hydrothermal method. Morphological characterizations showed the formation of well-dispersed SnO2 nanoparticles loaded on the rGO sheets with excellent transparency and obvious fold boundary. Structural analysis revealed good agreement with the standard crystalline phases of SnO2 and rGO. Gas sensing characteristics of the synthesized materials were carried out in a temperature range of 100–300 °C with various concentrations of C2H2 gas. At 180 °C, the SnO2–rGO hybrid showed preferable detection of C2H2 with high sensor response (12.4 toward 50 ppm), fast response-recovery time (54 s and 23 s), limit of detection (LOD) of 1.3 ppm and good linearity, with good selectivity and long-term stability. Furthermore, the possible gas sensing mechanism of the SnO2–rGO nanocomposites for C2H2 gas were summarized and discussed in detail. Our work indicates that the addition of rGO would be effective in enhancing the sensing properties of metal oxide-based gas sensors for C2H2 and may make a contribution to the development of an excellent ppm-level gas sensor for on-line monitoring of dissolved C2H2 gas in transformer oil. View Full-Text
Keywords: SnO2 nanoparticles; reduced graphene oxide; nanocomposite; dissolved gases in transformer oil; acetylene gas sensor; gas sensing mechanism SnO2 nanoparticles; reduced graphene oxide; nanocomposite; dissolved gases in transformer oil; acetylene gas sensor; 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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Jin, L.; Chen, W.; Zhang, H.; Xiao, G.; Yu, C.; Zhou, Q. Characterization of Reduced Graphene Oxide (rGO)-Loaded SnO2 Nanocomposite and Applications in C2H2 Gas Detection. Appl. Sci. 2017, 7, 19.

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