Low-operating temperature NO2 gas sensors based on hybrid two-dimensional SnS2-reduced graphene oxide

Shafiei, M, Bradford, J, Khan, H, Piloto, C, Wlodarski, W, Li, Y and Motta, N 2018, 'Low-operating temperature NO2 gas sensors based on hybrid two-dimensional SnS2-reduced graphene oxide', Applied Surface Science, vol. 462, pp. 330-336.


Document type: Journal Article
Collection: Journal Articles

Title Low-operating temperature NO2 gas sensors based on hybrid two-dimensional SnS2-reduced graphene oxide
Author(s) Shafiei, M
Bradford, J
Khan, H
Piloto, C
Wlodarski, W
Li, Y
Motta, N
Year 2018
Journal name Applied Surface Science
Volume number 462
Start page 330
End page 336
Total pages 7
Publisher Elsevier BV * North-Holland
Abstract The excellent sensing capabilities of SnS2 and the electrical properties of reduced graphene oxide (rGO) are combined to achieve a low-operating temperature NO2 gas sensor. Conductometric gas sensors based on hybrid films of 2D SnS2-rGO are fabricated and evaluated for humidity and different target gases including NO2, CH4, NH3, C2H5OH (ethanol), (CH3)2CO (acetone) at different operating temperatures ranging from 25 °C to 100 °C. The sensor shows exclusive selectivity and reversibility to NO2 as compared to the other analytes, with a low detection limit of 0.6 ppm and a response of 9.8% at 80 °C. The sensing mechanism of the hybrid SnS2-rGO system is described by analysing the effect of NO2 gas on the depletion region established at the interface between SnS2 and rGO layers.
Subject Chemical Sciences not elsewhere classified
Keyword(s) 2D materials
Gas sensor
Hybrid
Low operating temperature
Reduced graphene oxide (rGO)
SnS2
DOI - identifier 10.1016/j.apsusc.2018.08.115
Copyright notice © 2018 Elsevier B.V. All rights reserved.
ISSN 0169-4332
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