Room temperature UV-Vis activated NO2 gas sensor-based Mg-doped zinc oxide nanopowders

Mg-doped ZnO (MZO) nanopowders were synthesized by sol-gel process. These samples are then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescence (PL) analyses. Resistive sensors based on Mg-doped ZnO thick layers deposited on alumina substrates equipp...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2023, Vol.34 (2), p.137, Article 137
Main Authors: Jaballah, S., Hjiri, M., Zahmouli, N., Albargi, Hasan B., Dhahri, R., Dahman, H., Mir, L. El, Neri, G.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Gas sensors
Gases
High temperature
Illumination
Magnesium
Materials Science
Metal oxides
Morphology
Nanomaterials
Nitrates
Nitrogen dioxide
Optical and Electronic Materials
Photoluminescence
Physics
Radiation
Room temperature
Semiconductors
Sensors
Signal reconstruction
Sol-gel processes
Substrates
Transmission electron microscopy
Zinc oxide
Zinc oxides
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Summary:Mg-doped ZnO (MZO) nanopowders were synthesized by sol-gel process. These samples are then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescence (PL) analyses. Resistive sensors based on Mg-doped ZnO thick layers deposited on alumina substrates equipped with platinum interdigitated electrodes were fabricated and used as UV-Vis light activated NO 2 sensors. The dark and illumination conditions are both utilized to perform NO 2 gas sensing tests by exposing the sensors to UV-Vis radiation ( λ  = 400 nm). Under irradiation condition, NO 2 detection with Mg-doped ZnO sensor could be successfully performed even to room temperature (30 °C). Furthermore, photoactivation also promoted NO 2 sensitivity and shortened the signal recovery of Mg-doped ZnO sensors compared to undoped one. Results demonstrated that Mg-doped ZnO might be promising sensing materials for the detection of NO 2 under UV-Vis illumination.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-022-09499-6