Effect of Al and Mg Doping on Reducing Gases Detection of ZnO Nanoparticles

In this work, the main objective is to enhance the gas sensing capability through investigating the effect of Al and Mg doping on ZnO based sensors. ZnO, Mg<sub>1%</sub> doped ZnO, Al<sub>5%</sub> doped ZnO and (Al<sub>5%,</sub> Mg<sub>1%</sub>) co-dop...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Soumaya Jaballah, Yazeed Alaskar, Ibrahim AlShunaifi, Imed Ghiloufi, Giovanni Neri, Chaker Bouzidi, Hassen Dahman, Lassaad El Mir
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
Acceso en línea:https://doaj.org/article/86a22b1b895d4c07a75c495453f7b136
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
Descripción
Sumario:In this work, the main objective is to enhance the gas sensing capability through investigating the effect of Al and Mg doping on ZnO based sensors. ZnO, Mg<sub>1%</sub> doped ZnO, Al<sub>5%</sub> doped ZnO and (Al<sub>5%,</sub> Mg<sub>1%</sub>) co-doped ZnO nanoparticles (NPs) were synthesized by a modified sol-gel method. The structural characterization showed the hexagonal crystalline structure of the prepared samples. Morphological characterizations confirmed the nanometric sizes of the NPs (27–57 nm) and elemental composition investigation proved the existence of Al and Mg with low concentrations. The optical characterization showed the high absorbance of the synthesized samples in the UV range. The gas sensing performances of the synthesized samples, prepared in the form of thick films, were investigated. Sensing tests demonstrated the high influence of the Al and Mg on the sensing performances towards H<sub>2</sub> and CO gas, respectively. The 5A1MZO-based sensor exhibits high sensitivity and low detection limits to H<sub>2</sub> (<2 ppm) and CO (<1 ppm). It showed a response around 70 (at 250 °C) towards 2000 ppm H<sub>2</sub> and 2 (at 250 °C) towards CO.