Fabrication of NO2 gas sensor structure based on ZnMn2O4 nanoparticles

Subject Areas : Synthesis and Characterization of Nanostructures

Mahsa  Mojiri Andani ¹ (Experimental condensed matter physics research group, Department of. Physics, Isfahan University of Technology, Isfahan, Iran)
Parviz  Kameli ² (Experimental condensed matter physics research group, Department of. Physics, Isfahan University of Technology, Isfahan, Iran)
Saeid  Salari ³ (Experimental condensed matter physics research group, Department of. Physics, Isfahan University of Technology, Isfahan, Iran)
Mehdi  Ranjbar ⁴ (Experimental condensed matter physics research group, Department of. Physics, Isfahan University of Technology, Isfahan, Iran)

Received: 2024-02-25 Accepted : 2024-04-01 Published : 2024-05-11

Keywords: Co-precipitation, Gas sensor, Morphology, ZnMn2O4,

Abstract :

NO2 as a toxic gas in the environment and industry, is abundantly produced and needs to be detected. In this research, the measurement of NO2 gas using ZnMn2O4 nanoparticles made through a simple co-precipitation, process has been investigated. The structure and surface morphology of the prepared samples have been analyzed by X-ray diffraction and scanning electron microscopy, respectively. The X-ray diffraction spectrum shows that the structure of the sample is well formed without impurities. Electron microscope images show that the nanoparticles are formed as nanoplates with an average thickness of 30 nm. Gas sensing measurements were performed by exposing the sensor to %0.5 of NO2 gas at temperatures between 150 ℃ and 375 ℃. The measurements made in terms of temperature showed the maximum response at the temperature of 300 ℃, to %0.5 of NO2 gas. Also, the ZnMn2O4 sensor showed a repeatable and stable electrical signal. Therefore, ZnMn2O4 nanoparticles have a promising potential in the field of gas sensors.

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