Preparation and Chemical Gas Sensing Behavior of ZnCo2O4 Nano-Crystals

Chinnasamy Ramaraj Mariappan

doi:10.4028/www.scientific.net/AMM.749.215

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 749Preparation and Chemical Gas Sensing Behavior of...

Preparation and Chemical Gas Sensing Behavior of ZnCo₂O₄ Nano-Crystals

Abstract:

Spinel ZnCo₂O₄nanosized powders were prepared by decomposing of the metal nitrate solutions at 100 °C. Structural properties of the sample were investigated by using powder X-ray diffraction (XRD), UV-visible and High resolution transmission electron microscopy (HR-TEM) techniques. Spinel crystal structure of the sample is confirmed by XRD analysis. The average crystallite size of the samples is found about 60 nm by Williamson-Hall analysis. The average grain size and crystalline nature of the samples is further confirmed by using the HR-TEM analysis. The band-gap energy is found to be 2.67 (±0.03) eV. Electrical properties were studied by two probe ac impedance spectroscopy. Dc conductivity is temperature dependent and found to obey the Arrhenius behaviour. The gas sensing behaviors were investigated by using dc and ac impedance measurement methods. It shows the promising gas sensing behavior for liquefied petroleum gas.

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Periodical:

Applied Mechanics and Materials (Volume 749)

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215-219

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https://doi.org/10.4028/www.scientific.net/AMM.749.215

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Online since:

April 2015

Authors:

Chinnasamy Ramaraj Mariappan*

Keywords:

Gas Sensing, Metal Oxides, Nanoparticle

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