[Synthèse écologique de nanoparticules d’Ag:ZnO par la méthode solvothermique : caractérisation, propriétés photocatalytiques et diélectriques]
This study investigates the photocatalytic and dielectric properties of green-synthesized silver-doped zinc oxide nanoparticles (Ag:ZnONPs). FTIR analysis confirmed the presence of functional groups derived from the plant extract, which played a key role in the capping, and stabilization of the nanoparticles. SEM observations revealed rod-like and quasi-spherical nanostructures, while EDX analysis verified the successful incorporation of Ag into the ZnO matrix. XRD results confirmed the hexagonal wurtzite structure of synthesized sample, with an average crystallite size of approximately 20 nm. Photoluminescence studies showed near-band-edge emission with suppressed defect-related recombination, indicating improved charge carrier separation due to Ag doping. The Ag:ZnONPs demonstrated excellent visible-light photocatalytic performance, achieving nearly 99% degradation of crystal violet within 24 h and methyl orange within 72 h. Dielectric investigations revealed reduced impedance, and enhanced AC conductivity at room temperature, reflecting improved charge transport. The results highlight the multifunctional potential of green-synthesized Ag:ZnONPs for environmental remediation and advanced electronic applications.
Cette étude examine les propriétés photocatalytiques et diélectriques de nanoparticules d’oxyde de zinc dopées à l’argent (Ag:ZnONPs) obtenues par synthèse « verte ». L’analyse FTIR a confirmé la présence de groupes fonctionnels issus de l’extrait végétal, qui ont joué un rôle clé dans le revêtement et la stabilisation des nanoparticules. Les observations au MEB ont révélé des nanostructures en forme de bâtonnets et quasi-sphériques, tandis que l’analyse EDX a confirmé l’incorporation réussie de l’argent dans la matrice de ZnO. Les résultats de la diffraction des rayons X (DRX) ont confirmé la structure hexagonale de type wurtzite de l’échantillon synthétisé, avec une taille moyenne des cristallites d’environ 20 nm. Les études de photoluminescence ont montré une émission en bord de bande avec une recombinaison liée aux défauts réduite, indiquant une meilleure séparation des porteurs de charge due au dopage à l’argent. Les nanoparticules Ag:ZnO ont démontré une excellente caractéristique photocatalytique en lumière visible, atteignant une dégradation de près de 99 % du violet cristallisé en 24 h et du méthylorange en 72 h. Les analyses diélectriques ont révélé une impédance réduite et une conductivité en courant alternatif améliorée à température ambiante, reflétant un meilleur transport de charge. Ces résultats mettent en évidence le potentiel multifonctionnel des nanoparticules Ag:ZnO synthétisées en chimie douce pour la dépollution environnementale et les applications électroniques de pointe.
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Mots-clés : Ag:ZnONPs, Photocatalyse, Propriétés électriques
Manal Ahmed Awad 1 ; Khalid Mustafa Ortashi 2 ; Hayat Althobaiti 3 ; Nada Ali Almohawis 4
CC-BY 4.0
Manal Ahmed Awad; Khalid Mustafa Ortashi; Hayat Althobaiti; Nada Ali Almohawis. Green synthesis of Ag:ZnO nanoparticles via solvothermal method: characterization, photocatalytic and dielectric properties. Comptes Rendus. Physique, Volume 27 (2026), pp. 353-366. doi: 10.5802/crphys.286
@article{CRPHYS_2026__27_G1_353_0,
author = {Manal Ahmed Awad and Khalid Mustafa Ortashi and Hayat Althobaiti and Nada Ali Almohawis},
title = {Green synthesis of {Ag:ZnO} nanoparticles via solvothermal method: characterization, photocatalytic and dielectric properties},
journal = {Comptes Rendus. Physique},
pages = {353--366},
year = {2026},
publisher = {Acad\'emie des sciences, Paris},
volume = {27},
doi = {10.5802/crphys.286},
language = {en},
}
TY - JOUR AU - Manal Ahmed Awad AU - Khalid Mustafa Ortashi AU - Hayat Althobaiti AU - Nada Ali Almohawis TI - Green synthesis of Ag:ZnO nanoparticles via solvothermal method: characterization, photocatalytic and dielectric properties JO - Comptes Rendus. Physique PY - 2026 SP - 353 EP - 366 VL - 27 PB - Académie des sciences, Paris DO - 10.5802/crphys.286 LA - en ID - CRPHYS_2026__27_G1_353_0 ER -
%0 Journal Article %A Manal Ahmed Awad %A Khalid Mustafa Ortashi %A Hayat Althobaiti %A Nada Ali Almohawis %T Green synthesis of Ag:ZnO nanoparticles via solvothermal method: characterization, photocatalytic and dielectric properties %J Comptes Rendus. Physique %D 2026 %P 353-366 %V 27 %I Académie des sciences, Paris %R 10.5802/crphys.286 %G en %F CRPHYS_2026__27_G1_353_0
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