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Effect of synthesis method and morphology on the enhanced CO2 sensing properties of magnesium ferrite MgFe2O4

Sumangala, Thondiyanoor Pisharam and Pasquet, Isabelle and Presmanes, Lionel and Thimont, Yohann and Bonningue, Corine and Venkataramani, Narayanan and Prasad, Shiva and Baco-Carles, Valérie and Tailhades, Philippe and Barnabé, Antoine Effect of synthesis method and morphology on the enhanced CO2 sensing properties of magnesium ferrite MgFe2O4. (2018) Ceramics International, 44 (15). 18578-18584. ISSN 0272-8842

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Official URL: https://doi.org/10.1016/j.ceramint.2018.07.082

Abstract

The synthesis and characterization of magnesium ferrite MgFe2O4 prepared by co-precipitation and sol gel combustion is reported. Structural characterization showed that all the samples have single spinel phase. The co-precipitated sample exhibits smaller grains and twice higher BET surface than the sol gel combustion samples. The powder was shaped to dedicated chemo-resistive home-made sensors devices. The electrical properties and sensing properties towards carbon dioxide of both MgFe2O4 powders were studied. The type of charge carriers were analysed on the basis of the change in resistance in the presence of air and argon. The sensing response towards CO2 was found to be dependent on the morphology of the powder sample and the CO2 concentration. A high response of 36% towards 5000 ppm of CO2 was reached which is good for this gas. The key role of the Mg ions modulating the electrical properties is discussed.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institute of Infrastructure Technology Research and Management - IITRAM (INDIA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Indian Institute of Technology Bombay - IIT Bombay (INDIA)
Laboratory name:
Funders:
Agence Nationale de la Recherche - ANR - DST India
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Deposited By: Yves MOMBOISSE
Deposited On:30 Oct 2019 08:15

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