Synthesis of ZnMn₂O₄ Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Sensors
Juan Pablo Morán-LázaroMaría de la Luz Olvera-Amador

Abstract

Spinel-type ZnMn₂O₄ nanoparticles were synthesized via a simple and inexpensive microwave-assisted colloidal route. Structural studies by X-ray diffraction showed that a spinel crystal phase of ZnMn₂O₄ was obtained at a calcination temperature of 500 °C, which was confirmed by Raman and UV-vis characterizations. Spinel-type ZnMn₂O₄ nanoparticles with a size of 41 nm were identified by transmission electron microscopy. Pellet-type sensors were fabricated using ZnMn₂O₄ nanoparticles as sensing material. Sensing measurements were performed by exposing the sensor to different concentrations of propane or carbon monoxide at temperatures in the range from 100 to 300 °C. Measurements performed at an operating temperature of 300 °C revealed a good response to 500 ppm of propane and 300 ppm of carbon monoxide. Hence, ZnMn₂O₄ nanoparticles possess a promising potential in the gas sensors field.

References

Aug 19, 2008·The Journal of Physical Chemistry. B·Zhongli WangJian Meng
Aug 29, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·S RaniV P Seth
Jun 30, 2011·Nanoscale Research Letters·Pan ZhangShaomin Liu
Jan 1, 2010·Sensors·Chengxiang WangRui Gao
Nov 15, 2012·ACS Applied Materials & Interfaces·Chan Woong NaJong-Heun Lee
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Dec 22, 2016·Sensors·Juan Pablo Morán-LázaroVerónica María Rodríguez-Betancourtt

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Methods Mentioned

BETA
X-ray
transmission electron microscopy

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