Unconventional Synthesis of gamma-Fe2O3: Excellent Low-Concentration Ethanol Sensing Performance
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Unconventional Synthesis of gamma-Fe2O3: Excellent Low-Concentration Ethanol Sensing Performance
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| Creator |
Naskar, Atanu
Narjinary, Mousumi Kundu, Susmita |
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| Subject |
Electronics
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| Description |
This study reports on a simple unconventional procedure for synthesis of gamma-Fe2O3 nanopowder and its fabrication as a resistive ethanol sensor. gamma-Fe2O3 powder having an average particle size of similar to 15 nm was prepared by thermal decomposition of iron(III) acetylacetonate. Platinum incorporation (0.5-1.5 wt.%) was also carried out for enhancing sensing performance. The powders were characterized using an x-ray diffractometer, x-ray photoelectron spectroscopy, Brunauer-Emmett-Teller surface area, field area scanning electron microscopy, transmission electron microscopy along with energy dispersion x-ray analyses. Sensor fabricated from pure gamma-Fe2O3 exhibited excellent ethanol sensing performance at concentrations down to 1 ppm, having a great demand in medical diagnosis and food-processing industries. The response observed for pure gamma-Fe2O3 (similar to 75% for 1 ppm ethanol) was enhanced similar to 10% after 1 wt.% Pt impregnation. Sensors were quite stable and selective towards ethanol vapour detection. A possible mechanism for high sensing performance has been discussed.
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| Publisher |
Minerals, Metals, and Materials Society
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| Date |
2017-01
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/4084/1/kundu.pdf
Naskar, Atanu and Narjinary, Mousumi and Kundu, Susmita (2017) Unconventional Synthesis of gamma-Fe2O3: Excellent Low-Concentration Ethanol Sensing Performance. Journal of Electronic Materials, 46 (1). pp. 478-487. ISSN 0361-5235 |
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| Relation |
http://cgcri.csircentral.net/4084/
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