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Auteur Soumia Haya |
Documents disponibles écrits par cet auteur (2)
Affiner la recherche Interroger des sources externesElaboration des nanostructures de semi-conducteur SnO2 dopé au Strontium et étude de leurs propriétés structurales,optiques et photocatalytiques. / Soumia Haya
Titre : Elaboration des nanostructures de semi-conducteur SnO2 dopé au Strontium et étude de leurs propriétés structurales,optiques et photocatalytiques. Type de document : texte imprimé Auteurs : Soumia Haya, Auteur ; Ouahiba Halimi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 92 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Films minces SnO2 et SnO2 dopé au Sr DRX Absorption UV‐
Visible Raman Photocatalyse Bleu de méthylène Sol-gel method Sr-doped SnO2 UV irradiation solar irradiation Methylene Blue طريقة Sol gelالطبقات الرقيقة النانومترية لثاني أكسيد القصدير ثاني أكسيد القصدير المطعم
ب Srالاشعة الفوق بنفسجية الاشعة الشمسية ازرق المثيلينIndex. décimale : 530 Physique Résumé : This thesis is devoted to the synthesis and characterization of nanostructured films, and then used them in photocatalytic applications.
The first part focused on the synthesis of material: SnO2, and Sr‐doped SnO2 nanostructured films. One method was used for the preparation of the films, with varied and controlled properties: Sol‐gel method and deposited on the glass by dip‐coating technique.
In the second part, various physical and chemical characterizations such as:
XRD,Raman, UV‐visible and AFM were presented. Finally, we tested the photocatalytic efficient of tin dioxide and (8%) Sr‐doped SnO2 under UV and Solar irradiation regarding Methylene Blue dye degradation,
the photocatalytic activity of (8%) Sr –doped SnO2 films were much higher than that of the undoped SnO2.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/HAY7292.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10907 Elaboration des nanostructures de semi-conducteur SnO2 dopé au Strontium et étude de leurs propriétés structurales,optiques et photocatalytiques. [texte imprimé] / Soumia Haya, Auteur ; Ouahiba Halimi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 92 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Films minces SnO2 et SnO2 dopé au Sr DRX Absorption UV‐
Visible Raman Photocatalyse Bleu de méthylène Sol-gel method Sr-doped SnO2 UV irradiation solar irradiation Methylene Blue طريقة Sol gelالطبقات الرقيقة النانومترية لثاني أكسيد القصدير ثاني أكسيد القصدير المطعم
ب Srالاشعة الفوق بنفسجية الاشعة الشمسية ازرق المثيلينIndex. décimale : 530 Physique Résumé : This thesis is devoted to the synthesis and characterization of nanostructured films, and then used them in photocatalytic applications.
The first part focused on the synthesis of material: SnO2, and Sr‐doped SnO2 nanostructured films. One method was used for the preparation of the films, with varied and controlled properties: Sol‐gel method and deposited on the glass by dip‐coating technique.
In the second part, various physical and chemical characterizations such as:
XRD,Raman, UV‐visible and AFM were presented. Finally, we tested the photocatalytic efficient of tin dioxide and (8%) Sr‐doped SnO2 under UV and Solar irradiation regarding Methylene Blue dye degradation,
the photocatalytic activity of (8%) Sr –doped SnO2 films were much higher than that of the undoped SnO2.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/HAY7292.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10907 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HAY/7292 HAY/7292 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude des propriétés structurales et optiques de nano-cristaux semi-conducteurs à grand gap synthétisés par voie sol-gel modifiée Type de document : texte imprimé Auteurs : Soumia Haya, Auteur ; Ouahiba Halimi, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2010 Importance : 99 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Couches Minces ZnO,TiO2 irradiation UV diffraction des rayons X absorption optique photoluminescence Sol-Gel Dip-Cointing Thin Film UV light X-ray diffraction Optical absorption Photoluminescence امتصاص الضوئى UV الاشعة RX الاشعة السینیة TiO و 2 ZnO رقائق 2
. Dip – Coating الانبعاث الفوتوضوئى طریقة صول الجالIndex. décimale : 530 Physique Résumé : This thesis concerns the development and characterization of thin films of ZnO and TiO2, which were conducted at temperatures close to room temperature using the sol-gel method with a deposition technique ""Dip Coating."" The Both
samples were prepared by two different solutions: the first is to add the precursor of zinc acetate dihydrate and the solvent 2-methoxyethanol with monoethanolamine as a stabilizer, while the second is to dissolve the titaniaume IV propoxide in ethanol (solvent) with the addition of HCl as catalyst.
Structural characterization of thin films of ZnO and TiO2 was carried out by X-ray diffraction. It confirmed first, the formation of crystallites for both samples irradiated by UV light for 84 hours and 155 hours in the case of ZnO and TiO2, respectively, and secondly to determine their crystal structures and their small size
does not exceed a few of nanometers.
Characterization by measurement of optical absorption in the UV – visible domain, showed a shift of absorption edge for ZnO and TiO2 layers to high energies (short wavelengths) compared to that of bulk crystal of the latter two. This
discrepancy is due to quantum confinement effect induced by size reduction.
A second optical characterization by photoluminescence measurement showed that the samples prepared exhibit intense emission bands in the visible and near UV.
This observation led us to practical applications in area of optic and photovoltaic.
Diplôme : Magistère En ligne : ../theses/physique/HAY6698.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9925 Etude des propriétés structurales et optiques de nano-cristaux semi-conducteurs à grand gap synthétisés par voie sol-gel modifiée [texte imprimé] / Soumia Haya, Auteur ; Ouahiba Halimi, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2010 . - 99 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Couches Minces ZnO,TiO2 irradiation UV diffraction des rayons X absorption optique photoluminescence Sol-Gel Dip-Cointing Thin Film UV light X-ray diffraction Optical absorption Photoluminescence امتصاص الضوئى UV الاشعة RX الاشعة السینیة TiO و 2 ZnO رقائق 2
. Dip – Coating الانبعاث الفوتوضوئى طریقة صول الجالIndex. décimale : 530 Physique Résumé : This thesis concerns the development and characterization of thin films of ZnO and TiO2, which were conducted at temperatures close to room temperature using the sol-gel method with a deposition technique ""Dip Coating."" The Both
samples were prepared by two different solutions: the first is to add the precursor of zinc acetate dihydrate and the solvent 2-methoxyethanol with monoethanolamine as a stabilizer, while the second is to dissolve the titaniaume IV propoxide in ethanol (solvent) with the addition of HCl as catalyst.
Structural characterization of thin films of ZnO and TiO2 was carried out by X-ray diffraction. It confirmed first, the formation of crystallites for both samples irradiated by UV light for 84 hours and 155 hours in the case of ZnO and TiO2, respectively, and secondly to determine their crystal structures and their small size
does not exceed a few of nanometers.
Characterization by measurement of optical absorption in the UV – visible domain, showed a shift of absorption edge for ZnO and TiO2 layers to high energies (short wavelengths) compared to that of bulk crystal of the latter two. This
discrepancy is due to quantum confinement effect induced by size reduction.
A second optical characterization by photoluminescence measurement showed that the samples prepared exhibit intense emission bands in the visible and near UV.
This observation led us to practical applications in area of optic and photovoltaic.
Diplôme : Magistère En ligne : ../theses/physique/HAY6698.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9925 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HAY/6698 HAY/6698 Thèse Bibliothèque principale Thèses Disponible
