Reduced graphene oxide (rGO) decorated ZnO-SnO2: A ternary nanocomposite towards improved low concentration VOC sensing performance
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Reduced graphene oxide (rGO) decorated ZnO-SnO2: A ternary nanocomposite towards improved low concentration VOC sensing performance
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| Creator |
Sen, Sovandeb
Kundu, Susmita |
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| Subject |
Electronics
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| Description |
A ternary p-n-n heterojunction has been prepared by introducing reduced graphene oxide (rGO) in ZnO-SnO2 nanocomposite and its ppm level volatile organic compounds (VOCs) sensing properties have been exploited. Using a simple, facile sol-gel process, initially, ZnO-SnO2 nanocomposites containing different concentrations of ZnO and SnO2 were prepared and subsequently this was followed by rGO incorporation. The as-synthesized powders were well characterized through XRD, FTIR, Raman spectroscopy, FESEM, TEM, and XPS analyses. The sensing study revealed that, the ternary nanocomposite sensor delineated similar to 91% n type sensing response towards similar to 10 ppm acetone gas at an optimum working temperature of 150 degrees C. Even it could sense similar to 1 ppm acetone with appreciable sensing response of similar to 71%. Additionally, the sensor displayed fast response (similar to 10 s) and recovery time (similar to 100 s) suitable for detection of multiple pulses in short time duration. It also exhibited a considerable similar to 65% sensing response towards similar to 10 ppm ethanol at 150 degrees C. These superior sensing performances of rGO decorated ZnO-SnO2 nanocomposite illustrated with band structure modification. Our results indicated that, the fabricated rGO decorated ZnO-SnO2 sensor, with remarkable high sensing response, minimum interference from other toxic, inflammable gases and profound long term stability, could be considered as a prolific candidate for real time detection of low concentration VOCs in versatile commercial applications. (C) 2021 Elsevier B.V. All rights reserved.
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| Publisher |
Elsevier
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| Date |
2021-11
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/5283/1/kundu.pdf
Sen, Sovandeb and Kundu, Susmita (2021) Reduced graphene oxide (rGO) decorated ZnO-SnO2: A ternary nanocomposite towards improved low concentration VOC sensing performance. Journal of Alloys and Compounds, 881. Art No-160406. ISSN 0925-8388 |
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| Relation |
http://cgcri.csircentral.net/5283/
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