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Titre : دراسة البنى النانومترية لأكسيد التيتانيوم : تطبيق الكهروكيميائية الضوئية Type de document : texte imprimé Auteurs : نجاح صبتي, Auteur ; عاشور سليمان, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 133 ورقة. Format : 30 سم. Langues : Arabe (ara) Tags : nanostructures nanofils nanotubes Nanofeuilles nanofibres anodisation hydrothermique immersion TiO2 Fe2O3-TiO2 Fe-BaTiO3 CaTiO3-TiO2 photoélectro-chimique ."
nanowires Nanoleafs anodization, hydrothermal, immersion, photoelectrochemical
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???????? ??????? ????? ?????????????? ???????Index. décimale : 530 الفيزياء Résumé : In this work, the preparation of different TiO2 nanostructures and their functionalization by simple methods such as anodization and hydrothermal was undertaken.
Different techniques of analysis have been used to characterize the preparedlayers of TiO2 nanostructures on Ti substrate and related compounds. These are X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, UV-Visible spectroscopyandX-ray Photoelectron Spectroscopy (XPS).
Anatase and rutile TiO2 in various nanostructured forms were obtained (Nanotubes, nanofibers, nanoleafs and nanowires) and analyzed. Some of these nanostructures, particularly TiO2 nanotubes and nanofibers were successfully decorated with iron oxide (Fe2O3) phase, barium titanate (BaTiO3), and calcium titante(CaTiO3) nanoparticles using various methods (hydrothermal, impregnation, and rapid flame heating).The morphology of these nanostructures considerably changed with the hydrothermal processing temperature and time. The obtained nanostructures were heat treated at different treatments both under air and vacuum in order to change their content in oxygen vacancies. Photoelectrochemical testsof the obtained various nanostructures of TiO2heat treated at 450 °C under air and 300 °C under vacuum demonstrate that TiO2 nanoleafs and nanowires have the largest photoelectrochemical currentfor samples that are treated under air. Heat treatment under vacuum was successful only in the case of TiO2 nanofibers.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/ASOB4046.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9991 دراسة البنى النانومترية لأكسيد التيتانيوم : تطبيق الكهروكيميائية الضوئية [texte imprimé] / نجاح صبتي, Auteur ; عاشور سليمان, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2015 . - 133 ورقة. ; 30 سم.
Langues : Arabe (ara)
Tags : nanostructures nanofils nanotubes Nanofeuilles nanofibres anodisation hydrothermique immersion TiO2 Fe2O3-TiO2 Fe-BaTiO3 CaTiO3-TiO2 photoélectro-chimique ."
nanowires Nanoleafs anodization, hydrothermal, immersion, photoelectrochemical
????? ??????????? ??????? ???????? ??????? ???????? ????????
???????? ??????? ????? ?????????????? ???????Index. décimale : 530 الفيزياء Résumé : In this work, the preparation of different TiO2 nanostructures and their functionalization by simple methods such as anodization and hydrothermal was undertaken.
Different techniques of analysis have been used to characterize the preparedlayers of TiO2 nanostructures on Ti substrate and related compounds. These are X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, UV-Visible spectroscopyandX-ray Photoelectron Spectroscopy (XPS).
Anatase and rutile TiO2 in various nanostructured forms were obtained (Nanotubes, nanofibers, nanoleafs and nanowires) and analyzed. Some of these nanostructures, particularly TiO2 nanotubes and nanofibers were successfully decorated with iron oxide (Fe2O3) phase, barium titanate (BaTiO3), and calcium titante(CaTiO3) nanoparticles using various methods (hydrothermal, impregnation, and rapid flame heating).The morphology of these nanostructures considerably changed with the hydrothermal processing temperature and time. The obtained nanostructures were heat treated at different treatments both under air and vacuum in order to change their content in oxygen vacancies. Photoelectrochemical testsof the obtained various nanostructures of TiO2heat treated at 450 °C under air and 300 °C under vacuum demonstrate that TiO2 nanoleafs and nanowires have the largest photoelectrochemical currentfor samples that are treated under air. Heat treatment under vacuum was successful only in the case of TiO2 nanofibers.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/ASOB4046.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9991 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Etude des propriétés de surface modifiée par différentes méthodes de l’alliage Ti6Al4V utilisé en odontologie. / Abdelghani Boucheham
Titre : Etude des propriétés de surface modifiée par différentes méthodes de l’alliage Ti6Al4V utilisé en odontologie. Type de document : texte imprimé Auteurs : Abdelghani Boucheham, Auteur ; A. Karaali, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 131 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Alliage de titane implants dentaires oxydation thermique anodisation TiO2 nanoporeux spectroscopie d’impédance électrochimique culture cellulaire Titanium alloys dental implants thermal oxidation anodization nanoporous
TiO2 electrochemical impedance spectroscopy cells culture ????? ?????????? ??? ??????? ??????? ???????? ? ??????? ???????? ???? ??????
?? TiO2??????? ?????? ???????? ?????????????? ????? ???????Index. décimale : 530 Physique Résumé : Nanostructured oxide layers formed on the surface of Ti6Al4V alloys by thermal oxidation, anodic oxidation and alkali-hydrothermal treatment play an important role in the enhancement of their resistant to wear and corrosion, biocompatibility and osseointegration in the human body. Different surface structures, morphologies and topographies were obtained as revealed by using the x-ray diffraction technique, scanning electron microscopy and atomic force microscopy. The nature of thermal compact oxides was found to be dependent on the temperature and the duration of oxidation, the anatase presents the predominant phase at 500°C, while it disappears at 700°C, where the rutile becomes the predominant phase with the presence of alumina phase. The layers thickness and roughness increase with the temperature and the duration of treatment. Diameters and lengths of anodic nanotubes increase with the increase of applied potentials, nanopores dimensions increase also with the increase of alkalin-hydrothermal treatment duration. All studied surfaces exhibit good wear and corrosion resistance and biocompatibility, as assessed by friction essays, open circuit potential, electrochemical impedance spectroscopy, cyclic polarisation curves and cells culture assays.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU7377.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11026 Etude des propriétés de surface modifiée par différentes méthodes de l’alliage Ti6Al4V utilisé en odontologie. [texte imprimé] / Abdelghani Boucheham, Auteur ; A. Karaali, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 131 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Alliage de titane implants dentaires oxydation thermique anodisation TiO2 nanoporeux spectroscopie d’impédance électrochimique culture cellulaire Titanium alloys dental implants thermal oxidation anodization nanoporous
TiO2 electrochemical impedance spectroscopy cells culture ????? ?????????? ??? ??????? ??????? ???????? ? ??????? ???????? ???? ??????
?? TiO2??????? ?????? ???????? ?????????????? ????? ???????Index. décimale : 530 Physique Résumé : Nanostructured oxide layers formed on the surface of Ti6Al4V alloys by thermal oxidation, anodic oxidation and alkali-hydrothermal treatment play an important role in the enhancement of their resistant to wear and corrosion, biocompatibility and osseointegration in the human body. Different surface structures, morphologies and topographies were obtained as revealed by using the x-ray diffraction technique, scanning electron microscopy and atomic force microscopy. The nature of thermal compact oxides was found to be dependent on the temperature and the duration of oxidation, the anatase presents the predominant phase at 500°C, while it disappears at 700°C, where the rutile becomes the predominant phase with the presence of alumina phase. The layers thickness and roughness increase with the temperature and the duration of treatment. Diameters and lengths of anodic nanotubes increase with the increase of applied potentials, nanopores dimensions increase also with the increase of alkalin-hydrothermal treatment duration. All studied surfaces exhibit good wear and corrosion resistance and biocompatibility, as assessed by friction essays, open circuit potential, electrochemical impedance spectroscopy, cyclic polarisation curves and cells culture assays.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU7377.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11026 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
