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Elaboration of Metallic oxide nanopowder Fe dopedZnO

Auteurs : Amel Boulassel, Zahi Takkouk
Année : 2016
Domaine : Sciences des matériaux
Type : Communication
Conférence: 7th African Conference on Non Destructive Testing ACNDT 2016 & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : ZnO, ZnFe 2 O, co-précipitation, the structural properties, nanopowder.

Résumé :

Among the methods of elaboration the metallicoxide nanopowders based on green chemistry,co-precipitation isa simple process used for industrial production in differentsectors .It is the preparation of an aqueous solution containingthe desired cation then mixing with a solution containing theprecipitating agent .the precipitate is then separated from theliquid by filtration, washing, drying and then thermallydecomposing to yield the desired product.Our study focused on pure and Fe doped ZnO nanopowders(Zn1-xFeO, x=0.0,0.005,0.02,0.05 and 0.15)prepared by coprecipitationmethode at room temperature with zinc acetate as azinc source. Samples were analyzed by X-ray diffraction (XRD),scanning electron microscope (SEM), infrared spectroscopy IRand UV-visible spectroscopy.xAll powders are polycrystalline with a hexagonal (wurtzite),grain powders were nanometric sizes. From a doping level thesecondary phase ZnFe2O4 appear and found a decrease in grainsize and increase internal stresses with increasing theconcentration of Fe dopant. SEM images show the existence ofsettlements powder particles in spherical form. IR infraredspectroscopy we identified in the specific vibration and the peakcharacteristic of the ZnO matrix, Zn-O binding was clearlyobserved at around 470 cm-1.the Study of the optical properties ofthe samples clearly shows the doping effect on the opticalabsorption spectra and allowed us to determine the opticalabsorption edge and the width of the gap.