| Titre : |
Etude des propriétés structurales, optiques et photocatalytiques de nanocomposites ZnS/zéolithe Y synthétisés par radiolyse. |
| Type de document : |
texte imprimé |
| Auteurs : |
Kamel Djebli, Auteur ; Nassira Keghouche, Directeur de thèse |
| Mention d'édition : |
01/12/2019 |
| Editeur : |
جامعة الإخوة منتوري قسنطينة |
| Année de publication : |
2019 |
| Importance : |
116 f. |
| Format : |
30 cm. |
| Note générale : |
1 copies imprimées disponibles
|
| Langues : |
Français (fre) |
| Catégories : |
Français - Anglais
Physique
|
| Tags : |
physique: Rayonnement et Applications méthode radiolytique photocatalyseur Nanoparticules de ZnS zéolite Y thiol Rouge Congo radiolytic method photocatalyst ZnS nanoparticles zeolite Y Congo red طريقة التحليل الإشعاعي حفاز ضوئي الجسيمات النانوية ZnSزيوليت Y ثيول الكونغو الاحمر. |
| Index. décimale : |
530 Physique |
| Résumé : |
The present study deals with würtzite ZnS nanoparticles embedded in zeolite Y, synthesized by - radiolysis. In a first step; zeolite Y (faugazite) is prepared by hydrothermal methode. In second, Zn2+ ions are fixed on the zeolite by ionic exchange. Finally, γ rays are performed on Zn-Y with thiol; which leads to the generation of ZnS-Y nanoparticles. The nanocomposites were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), UV–Visible
absorption, and photoluminescence (PL). Compared to the bulk state, ZnS nanocrystals have blue – shifted UV visible absorption, with an excitonic peak situated at around 320 nm. They display a wide photoluminescence band with seven peaks in the range of 320 to 550 nm. The increase of the irradiation dose and RSH concentration results in a growth the ZnS nanocrystals and improves their optical performances. The optical as well as the structural characterizations confirmed the nanometric size of ZnS particles (ɸ = 5-18 nm). When tested in photodegradation
of Congo red under sun light, ZnS-zeolite Y catalyst exhibited high efficiency.
|
| Diplôme : |
Doctorat en sciences |
| En ligne : |
../theses/physique/DJE7593.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
index.php?lvl=notice_display&id=11429 |
Etude des propriétés structurales, optiques et photocatalytiques de nanocomposites ZnS/zéolithe Y synthétisés par radiolyse. [texte imprimé] / Kamel Djebli, Auteur ; Nassira Keghouche, Directeur de thèse . - 01/12/2019 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 116 f. ; 30 cm. 1 copies imprimées disponibles
Langues : Français ( fre)
| Catégories : |
Français - Anglais
Physique
|
| Tags : |
physique: Rayonnement et Applications méthode radiolytique photocatalyseur Nanoparticules de ZnS zéolite Y thiol Rouge Congo radiolytic method photocatalyst ZnS nanoparticles zeolite Y Congo red طريقة التحليل الإشعاعي حفاز ضوئي الجسيمات النانوية ZnSزيوليت Y ثيول الكونغو الاحمر. |
| Index. décimale : |
530 Physique |
| Résumé : |
The present study deals with würtzite ZnS nanoparticles embedded in zeolite Y, synthesized by - radiolysis. In a first step; zeolite Y (faugazite) is prepared by hydrothermal methode. In second, Zn2+ ions are fixed on the zeolite by ionic exchange. Finally, γ rays are performed on Zn-Y with thiol; which leads to the generation of ZnS-Y nanoparticles. The nanocomposites were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), UV–Visible
absorption, and photoluminescence (PL). Compared to the bulk state, ZnS nanocrystals have blue – shifted UV visible absorption, with an excitonic peak situated at around 320 nm. They display a wide photoluminescence band with seven peaks in the range of 320 to 550 nm. The increase of the irradiation dose and RSH concentration results in a growth the ZnS nanocrystals and improves their optical performances. The optical as well as the structural characterizations confirmed the nanometric size of ZnS particles (ɸ = 5-18 nm). When tested in photodegradation
of Congo red under sun light, ZnS-zeolite Y catalyst exhibited high efficiency.
|
| Diplôme : |
Doctorat en sciences |
| En ligne : |
../theses/physique/DJE7593.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
index.php?lvl=notice_display&id=11429 |
|
Affiner la recherche Interroger des sources externesEtude des caracteristiques structurales et optiques des nanoparticules de Zns encagees dans la zeolithe Y / Kamel Djebli
