DSpace Repository

Elaboration et caractérisation de l’aluminate de Zinc nanocristallin (pur et dopé) synthétisé par la méthode Sol-Gel.

Show simple item record

dc.contributor.author Filali, Hichem
dc.contributor.author Karaali, A.
dc.date.accessioned 2022-12-17T12:46:40Z
dc.date.available 2022-12-17T12:46:40Z
dc.date.issued 2022-10-27
dc.identifier.uri http://depot.umc.edu.dz/handle/123456789/13517
dc.description.abstract Samples of pure zinc aluminates (ZnAl2O4) and doped ZnAl2O4 with both lead (Pb2+) at different ratios (0, 0.5, 1, 1.5, 2, and 2.5% mol) and a constant amount of lanthanum (La3+: 1% mol), were prepared by the citrate sol-gel technique, and then annealed at 900°C for 2h. To study the structural, optical, and thermal properties; different characterization methods were used, such as powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), differential scanning calorimetry (DSC-TG), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. Analysis by XRD revealed the presence, for all samples, of the cubic, single-phase ZnAl2O4, without any impurity phases, with a crystallites size between 19 and 25 nm. These results were confirmed using FTIR and Raman spectroscopy. Also UV–VIS spectra indicated that the band-gap of the doped samples decreases and exhibits a red shift with the increase of Pb2+ ion concentration. In addition, a photocatalytic study for different samples of ZnAl2O4 showed that they could be used as photocatalysts and good adsorbents for the degradation of a Hexamethyl Crystallized Violet (HCV) dye in an aqueous solution. Photoluminescence spectra of pure, doped, and co-doped ZnAl2O4 show emission peaks located at 432, 510, and 566 nm fr_FR
dc.language.iso fr fr_FR
dc.publisher Université Frères Mentouri - Constantine 1 fr_FR
dc.subject physique: Sciences des Matériaux fr_FR
dc.subject Nanoparticules de ZnAl2O4 fr_FR
dc.subject Sol-gel fr_FR
dc.subject photocatalyse fr_FR
dc.subject Adsorption fr_FR
dc.subject ZnAl2O4 nanoparticles fr_FR
dc.subject photocatalysis fr_FR
dc.subject الجسيمات النانوية من fr_FR
dc.subject ZnAl2O4صول- جال fr_FR
dc.subject التحفيزالضوئي fr_FR
dc.subject الاضمصاص fr_FR
dc.title Elaboration et caractérisation de l’aluminate de Zinc nanocristallin (pur et dopé) synthétisé par la méthode Sol-Gel. fr_FR
dc.type Thesis fr_FR

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


My Account