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Elaboration et étude des propriétés des couches minces d’oxydes et de nanocomposites à base de TiO2. / Farida Medjaldi
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Titre : Elaboration et étude des propriétés des couches minces d’oxydes et de nanocomposites à base de TiO2. Type de document : texte imprimé Auteurs : Farida Medjaldi, Auteur ; Abderaheman Bouabellou, Directeur de thèse Mention d'édition : 03/10/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 129 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique:Sciences des Matériaux TiO2 SnO2 TiO2 :SnO2 nanocomposite sol-gel guidage optique photocatalyse optical guidance photocatalysis اكسيد التيتان اكسيد القصدير الاكاسيد المركبة سائل-جامد التوجيه البصري التحفيز الضوئي Index. décimale : 530 Physique Résumé :
The present work consists in studying the structural, optical and photocatalytic properties of thin layers of oxide and nanocomposites based on TiO2 elaborated by the sol-gel method. The different samples are characterized by means of several techniques: X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), m_lines spectroscopy (optical guidance), UV-Visible spectrophotometry, and photoluminescence. The XRD results show that the pure TiO2 layers, prepared by using two different precursors, crystallize in a tetragonal anatase structure, and that the intensity of the diffraction peaks increases with the growth of the thickness of the layers. The pure SnO2 layers crystallize in the rutile phase (cassiterite). The micro-Raman analysis shows that the TiO2: SnO2 nanocomposites are characterized by the two phase-vibration modes anatase TiO2 and rutile TiO2. While the addition of SnO2 oxide leads to a decrease of the vibration modes of the TiO2 anatase phase and an increase in the intensity of the signals associated with the rutile TiO2. This means that SnO2 promotes and facilitates the growth of the TiO2 rutile at low temperatures, due to the fact that the TiO2 rutile has a structure identical to that of the SnO2 cassiterite phase. The SEM observations confirm the results obtained by Raman spectroscopie. The results obtained using UV-Visible spectrophotometry show that all the films are transparent in the visible and opaque in the UV, the transmission and the number of interference fringes of the TiO2: SnO2 layers decrease with increasing SnO2 concentration. The waveguiding measurements record the excitation of a single guided mode for the two polarizations TE0 and TM0 for all the samples. A decreasing profile of refractive index and of thickness is observed as the content of SnO2 increases. Photocatalytic tests are carried out on the degradation of the methylene blue (BM) under UV radiation. The obtained results show that the degradation efficiency of thin TiO2: SnO2 (8: 2) films is greater than that of pure TiO2 and SnO2 oxide films. Photoelectrochemical measurements show that the film of the SnO2: TiO2 (8: 2) nanocomposite exhibits the highest photocurrent response.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/physique/MED7723.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11557 Elaboration et étude des propriétés des couches minces d’oxydes et de nanocomposites à base de TiO2. [texte imprimé] / Farida Medjaldi, Auteur ; Abderaheman Bouabellou, Directeur de thèse . - 03/10/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 129 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique:Sciences des Matériaux TiO2 SnO2 TiO2 :SnO2 nanocomposite sol-gel guidage optique photocatalyse optical guidance photocatalysis اكسيد التيتان اكسيد القصدير الاكاسيد المركبة سائل-جامد التوجيه البصري التحفيز الضوئي Index. décimale : 530 Physique Résumé :
The present work consists in studying the structural, optical and photocatalytic properties of thin layers of oxide and nanocomposites based on TiO2 elaborated by the sol-gel method. The different samples are characterized by means of several techniques: X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), m_lines spectroscopy (optical guidance), UV-Visible spectrophotometry, and photoluminescence. The XRD results show that the pure TiO2 layers, prepared by using two different precursors, crystallize in a tetragonal anatase structure, and that the intensity of the diffraction peaks increases with the growth of the thickness of the layers. The pure SnO2 layers crystallize in the rutile phase (cassiterite). The micro-Raman analysis shows that the TiO2: SnO2 nanocomposites are characterized by the two phase-vibration modes anatase TiO2 and rutile TiO2. While the addition of SnO2 oxide leads to a decrease of the vibration modes of the TiO2 anatase phase and an increase in the intensity of the signals associated with the rutile TiO2. This means that SnO2 promotes and facilitates the growth of the TiO2 rutile at low temperatures, due to the fact that the TiO2 rutile has a structure identical to that of the SnO2 cassiterite phase. The SEM observations confirm the results obtained by Raman spectroscopie. The results obtained using UV-Visible spectrophotometry show that all the films are transparent in the visible and opaque in the UV, the transmission and the number of interference fringes of the TiO2: SnO2 layers decrease with increasing SnO2 concentration. The waveguiding measurements record the excitation of a single guided mode for the two polarizations TE0 and TM0 for all the samples. A decreasing profile of refractive index and of thickness is observed as the content of SnO2 increases. Photocatalytic tests are carried out on the degradation of the methylene blue (BM) under UV radiation. The obtained results show that the degradation efficiency of thin TiO2: SnO2 (8: 2) films is greater than that of pure TiO2 and SnO2 oxide films. Photoelectrochemical measurements show that the film of the SnO2: TiO2 (8: 2) nanocomposite exhibits the highest photocurrent response.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/physique/MED7723.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11557 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MED/7723 MED/7723 Thèse Bibliothèque principale Thèses Disponible Synthèse et caractérisation des nanocomposites polyéthèLne haute densité-Montmorillonite / Chérifa Boulechfar
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Titre : Synthèse et caractérisation des nanocomposites polyéthèLne haute densité-Montmorillonite Type de document : texte imprimé Auteurs : Chérifa Boulechfar ; Univ. de Constantine, Éditeur scientifique ; S. Bensaad, Directeur de thèse Année de publication : 2007 Importance : 112 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Nanocomposite Polyéthylène haute densité Melt intéraction Argile Montmorillonite Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/BOU5020.pdf Permalink : index.php?lvl=notice_display&id=3763 Synthèse et caractérisation des nanocomposites polyéthèLne haute densité-Montmorillonite [texte imprimé] / Chérifa Boulechfar ; Univ. de Constantine, Éditeur scientifique ; S. Bensaad, Directeur de thèse . - 2007 . - 112 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Nanocomposite Polyéthylène haute densité Melt intéraction Argile Montmorillonite Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/BOU5020.pdf Permalink : index.php?lvl=notice_display&id=3763 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/5020 BOU/5020 Thèse Bibliothèque principale Thèses Disponible Caractérisations des réactions interfaciales dans les couches minces métalliques binaires et multiples / Farida Kezai (Née Medjani)
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Titre : Caractérisations des réactions interfaciales dans les couches minces métalliques binaires et multiples Type de document : texte imprimé Auteurs : Farida Kezai (Née Medjani) ; Univ. de Constantine, Éditeur scientifique ; Rachid Halimi, Directeur de thèse Année de publication : 2007 Importance : 89 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Pulvérisation Morphologie Multicouches TiN/AlN Nanocomposite Propriétés structurales Résistivité électrique Nanodureté Sputtering Multilayers TiN/AlN Zr-Si-N Structural proprieties Morphology Electrical resistivity Nanohardness Index. décimale : 530 Physique Résumé : DC reactive magnetron co-sputtering was used for the deposition of Zr-Si-N thin films and a multilayers TiN/AlN.
Si content (CSi) was varied by changing the power applied on the Si target, whereas that on Zr target was kept constant. Four series of samples have been deposited at various substrate temperatures: room temperature, 240 °C, 440 °C and 640 °C. The evolution of morphology,
crystalline structure, grain size and lattice constant has been investigated by X-ray diffraction analyses. Nanohardness, stress and resistivity measurements provide complementary information, which validate the proposed 3-step model for the film formation of the Zr-Si-N system deposited by reactive magnetron cosputtering. For low Si content the Si atoms substitute the Zr atoms in the ZrN lattice. Above the solubility limit, a nanocomposite film containing ZrN:Si nanocrystallites and amorphous SiNy is formed. Further increase of Si content results in a reduction of grain size (D), while the thickness of the SiNy layer at the crystallite surface remains constant. The increasing amount of the SiNy amorphous phase in the films is realized by increasing the surface to volume ratio of the crystallites. In this concentration range, the size of the crystallites in the Zr-Si-N films decreases according to the relationship CSi ~1/D. With
increasing the substrate temperature, the solubility limit of Si in ZrN decreases whereas the films’ global nitruration (CN /(CSi + CZr)) increases. The concentration dependence of the electrical resistivity is interpreted in terms of the variation of the SiNy layer thickness.
By controlling the thickness of individual layers (1-50 nm) and substrate bias (Vb = -25 V and V b = - 100V) two series of samples were prepared. The films were characterized using X-ray diffraction (DRX), cross-sectional electron microscopy (MET) and nanoindentation. The
measured hardness of multilayer films were found to be always higher than the rule of the mixture, but the magnitude of hardness enhancement was found to be dependent on the bilayer thickness and bias substrate. Decreasing progressively the layer thickness favors the alignment of
(0002) basal plan of w-AlN on (111) plane of TiN, and results in the development of strong (111) texture, prerequisite for stabilization of c-AlN and formation of epitaxial coherent structures.Diplôme : Doctorat En ligne : ../theses/physique/KEZ5008.pdf Permalink : index.php?lvl=notice_display&id=3347 Caractérisations des réactions interfaciales dans les couches minces métalliques binaires et multiples [texte imprimé] / Farida Kezai (Née Medjani) ; Univ. de Constantine, Éditeur scientifique ; Rachid Halimi, Directeur de thèse . - 2007 . - 89 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Pulvérisation Morphologie Multicouches TiN/AlN Nanocomposite Propriétés structurales Résistivité électrique Nanodureté Sputtering Multilayers TiN/AlN Zr-Si-N Structural proprieties Morphology Electrical resistivity Nanohardness Index. décimale : 530 Physique Résumé : DC reactive magnetron co-sputtering was used for the deposition of Zr-Si-N thin films and a multilayers TiN/AlN.
Si content (CSi) was varied by changing the power applied on the Si target, whereas that on Zr target was kept constant. Four series of samples have been deposited at various substrate temperatures: room temperature, 240 °C, 440 °C and 640 °C. The evolution of morphology,
crystalline structure, grain size and lattice constant has been investigated by X-ray diffraction analyses. Nanohardness, stress and resistivity measurements provide complementary information, which validate the proposed 3-step model for the film formation of the Zr-Si-N system deposited by reactive magnetron cosputtering. For low Si content the Si atoms substitute the Zr atoms in the ZrN lattice. Above the solubility limit, a nanocomposite film containing ZrN:Si nanocrystallites and amorphous SiNy is formed. Further increase of Si content results in a reduction of grain size (D), while the thickness of the SiNy layer at the crystallite surface remains constant. The increasing amount of the SiNy amorphous phase in the films is realized by increasing the surface to volume ratio of the crystallites. In this concentration range, the size of the crystallites in the Zr-Si-N films decreases according to the relationship CSi ~1/D. With
increasing the substrate temperature, the solubility limit of Si in ZrN decreases whereas the films’ global nitruration (CN /(CSi + CZr)) increases. The concentration dependence of the electrical resistivity is interpreted in terms of the variation of the SiNy layer thickness.
By controlling the thickness of individual layers (1-50 nm) and substrate bias (Vb = -25 V and V b = - 100V) two series of samples were prepared. The films were characterized using X-ray diffraction (DRX), cross-sectional electron microscopy (MET) and nanoindentation. The
measured hardness of multilayer films were found to be always higher than the rule of the mixture, but the magnitude of hardness enhancement was found to be dependent on the bilayer thickness and bias substrate. Decreasing progressively the layer thickness favors the alignment of
(0002) basal plan of w-AlN on (111) plane of TiN, and results in the development of strong (111) texture, prerequisite for stabilization of c-AlN and formation of epitaxial coherent structures.Diplôme : Doctorat En ligne : ../theses/physique/KEZ5008.pdf Permalink : index.php?lvl=notice_display&id=3347 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KEZ/5008 KEZ/5008 Thèse Bibliothèque principale Thèses Disponible Elaboration et caractérisation des couches minces du semiconducteur ZnO pures et dopées par le Cadmium / Badis Rahal
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Titre : Elaboration et caractérisation des couches minces du semiconducteur ZnO pures et dopées par le Cadmium Type de document : texte imprimé Auteurs : Badis Rahal, Auteur ; Boubekeur Boudine, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 117 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Zinc oxide Cadmium oxide Nanocomposite Thin films Dip-coating Colloidal Sol-Gel Oxyde de zinc Oxyde de cadmium Couches minces Dip-Coating Colloïdale Index. décimale : 530 Physique Résumé : The present work consists in the elaboration and characterization of the undoped and
cadmium-doped ZnO with different concentrations of cadmium (Cd) (1, 2, 5 and 10% in weight)
thin films in order to improve the structural and optical properties of ZnO. The samples were
prepared using two methods; Colloidal and Sol-Gel and deposited on glass and silicon substrates
by the Dip-coating technique.
The structural characterization showed the formation of ZnO with hexagonal structure
(wurtzite) with a preferential orientation according to plane (002) (sol-gel method). With the
exception of doping with 10% Cd (colloidal method), the formation of the ZnO/CdO
nanocomposite was assisted. SEM and AFM images revealed the nanometric character of our
films. The Raman diffusion confirmed the results of the DRX that is the formation of ZnO with
hexagonal structure (wurtzite).
The RBS spectroscopy has proved the existence, in our films, of the elements (zinc,
cadmium and oxygen) and gave us an idea on the thickness of the thin films. The measurement
of ellipsometry allowed us to evaluate the refractive index of our films and to estimate their
thickness. UV-visible spectroscopy has shown that our layers have a transparency, in the visible,
which varies between 70 and 90%. And that the gap decreases with the increase in doping. The
photoluminescence of the films showed ultraviolet (UV) and visible emissions related to defects.
Auger analysis on layers deposited on silicon substrates gave us an estimate of the thickness.Diplôme : Doctorat en sciences En ligne : ../theses/physique/RAH7052.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10548 Elaboration et caractérisation des couches minces du semiconducteur ZnO pures et dopées par le Cadmium [texte imprimé] / Badis Rahal, Auteur ; Boubekeur Boudine, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 117 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Zinc oxide Cadmium oxide Nanocomposite Thin films Dip-coating Colloidal Sol-Gel Oxyde de zinc Oxyde de cadmium Couches minces Dip-Coating Colloïdale Index. décimale : 530 Physique Résumé : The present work consists in the elaboration and characterization of the undoped and
cadmium-doped ZnO with different concentrations of cadmium (Cd) (1, 2, 5 and 10% in weight)
thin films in order to improve the structural and optical properties of ZnO. The samples were
prepared using two methods; Colloidal and Sol-Gel and deposited on glass and silicon substrates
by the Dip-coating technique.
The structural characterization showed the formation of ZnO with hexagonal structure
(wurtzite) with a preferential orientation according to plane (002) (sol-gel method). With the
exception of doping with 10% Cd (colloidal method), the formation of the ZnO/CdO
nanocomposite was assisted. SEM and AFM images revealed the nanometric character of our
films. The Raman diffusion confirmed the results of the DRX that is the formation of ZnO with
hexagonal structure (wurtzite).
The RBS spectroscopy has proved the existence, in our films, of the elements (zinc,
cadmium and oxygen) and gave us an idea on the thickness of the thin films. The measurement
of ellipsometry allowed us to evaluate the refractive index of our films and to estimate their
thickness. UV-visible spectroscopy has shown that our layers have a transparency, in the visible,
which varies between 70 and 90%. And that the gap decreases with the increase in doping. The
photoluminescence of the films showed ultraviolet (UV) and visible emissions related to defects.
Auger analysis on layers deposited on silicon substrates gave us an estimate of the thickness.Diplôme : Doctorat en sciences En ligne : ../theses/physique/RAH7052.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10548 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité RAH/7052 RAH/7052 Thèse Bibliothèque principale Thèses Disponible Photodegradation du naproxene induite par un Oxyde de Fer (III) (Goethite) sous forme particulaire et nanoparticulaire. / Nessrine Setifi
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Titre : Photodegradation du naproxene induite par un Oxyde de Fer (III) (Goethite) sous forme particulaire et nanoparticulaire. Type de document : texte imprimé Auteurs : Nessrine Setifi, Auteur ; Nadra Debbache, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 196 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
ChimieTags : Chimie: Chimie Analytique et Environnement Naproxène Photodégradation Nanoparticule Nanocomposite Goethite Fenton نابروكسين التحلل الضوئي جسيمات متناهية الصغر بمركب متناهي في الصغر الجيوثايت فنتون Index. décimale : 540 Chimie et sciences connexes Résumé :
The photodegradation under artificial and solar irradiation of Naproxen (NPX, induced by 3 iron (III) oxy (hydroxide) based semiconductors (Goethite) was studied in aqueous solution in heterogeneous phase. The phototransformation of the substrate was followed by spectrophotometry and HPLC in the different systems. Semiconductors including particulate Goethite (GO), nanoparticle (nGO) and nanocomposite montmorillonite - Goethite (MGO) were synthesized at laboratory, and characterized by different methods (RDX, BET, SEM, TEM ...). The results of the XRD show good crystallinity. In addition, SEM and TEM analysis revealed that the particle sizes of GO, nGO and MGO are: 5 μm, 37.64 nm and 45.79 nm respectively. The removal of NPX in the presence of GO, in the absence and in the presence of light, has shown that the NPX is eliminated by both processes with a faster rate in the presence of light and seems closely dependent on the PH. The optimization of important parameters in the photochemical process was also undertaken in order to quantify the reagents necessary for the completion of the reaction. The addition of activators such as hydrogen peroxide and oxalic acid in the NPX-GO mixture significantly improves the disappearance of the substrate. In a second part, the degradation of NPX by nGO was undertaken in a similar way comparing with GO. It appeared in the systems nGO-H2O2-UV and nGO- AOx-UV are more efficient than the corresponding simple system. Finally, the performance of the new MGO catalyst has been demonstrated in the degradation of NPX. In the absence of light, an interaction between NPX and MGO was found where 33% of NPX was eliminated for a quantity of MGO of 1 g / L. Under light irradiation, 96.5% of NPX was degraded after 5 hours. The Fe (II) formed exclusively in the mixture shows the photocatalytic dissolution of the MGO. The influence of some parameters has been treated. The degradation efficiency of NPX in mixture (NPX-MGO- H2O2, pH = 3) made it possible to improve the rate of degradation to 100% NPX in 60 minutes. The formation of iron (II) in the H2O2- containing mixture creates the Fenton process under these conditions. The hydroxyl radicals have been demonstrated by the use of 1% isopropanol. Illumination of this mixture significantly advanced the reaction with 100% substrate degradation in only 10 minutes. Several parameters affecting this process have been optimized: pH, MGO dosage and H2O2 concentration. Under solar irradiation, the results showed that 30 minutes were sufficient for complete degradation of NPX at free pH. The effect of pH and some cationic metals allows considering this low-cost process in the elimination of this kind of emerging pollutants.Diplôme : Doctorat En ligne : ../theses/chimie/SET7532.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11371 Photodegradation du naproxene induite par un Oxyde de Fer (III) (Goethite) sous forme particulaire et nanoparticulaire. [texte imprimé] / Nessrine Setifi, Auteur ; Nadra Debbache, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2019 . - 196 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Chimie: Chimie Analytique et Environnement Naproxène Photodégradation Nanoparticule Nanocomposite Goethite Fenton نابروكسين التحلل الضوئي جسيمات متناهية الصغر بمركب متناهي في الصغر الجيوثايت فنتون Index. décimale : 540 Chimie et sciences connexes Résumé :
The photodegradation under artificial and solar irradiation of Naproxen (NPX, induced by 3 iron (III) oxy (hydroxide) based semiconductors (Goethite) was studied in aqueous solution in heterogeneous phase. The phototransformation of the substrate was followed by spectrophotometry and HPLC in the different systems. Semiconductors including particulate Goethite (GO), nanoparticle (nGO) and nanocomposite montmorillonite - Goethite (MGO) were synthesized at laboratory, and characterized by different methods (RDX, BET, SEM, TEM ...). The results of the XRD show good crystallinity. In addition, SEM and TEM analysis revealed that the particle sizes of GO, nGO and MGO are: 5 μm, 37.64 nm and 45.79 nm respectively. The removal of NPX in the presence of GO, in the absence and in the presence of light, has shown that the NPX is eliminated by both processes with a faster rate in the presence of light and seems closely dependent on the PH. The optimization of important parameters in the photochemical process was also undertaken in order to quantify the reagents necessary for the completion of the reaction. The addition of activators such as hydrogen peroxide and oxalic acid in the NPX-GO mixture significantly improves the disappearance of the substrate. In a second part, the degradation of NPX by nGO was undertaken in a similar way comparing with GO. It appeared in the systems nGO-H2O2-UV and nGO- AOx-UV are more efficient than the corresponding simple system. Finally, the performance of the new MGO catalyst has been demonstrated in the degradation of NPX. In the absence of light, an interaction between NPX and MGO was found where 33% of NPX was eliminated for a quantity of MGO of 1 g / L. Under light irradiation, 96.5% of NPX was degraded after 5 hours. The Fe (II) formed exclusively in the mixture shows the photocatalytic dissolution of the MGO. The influence of some parameters has been treated. The degradation efficiency of NPX in mixture (NPX-MGO- H2O2, pH = 3) made it possible to improve the rate of degradation to 100% NPX in 60 minutes. The formation of iron (II) in the H2O2- containing mixture creates the Fenton process under these conditions. The hydroxyl radicals have been demonstrated by the use of 1% isopropanol. Illumination of this mixture significantly advanced the reaction with 100% substrate degradation in only 10 minutes. Several parameters affecting this process have been optimized: pH, MGO dosage and H2O2 concentration. Under solar irradiation, the results showed that 30 minutes were sufficient for complete degradation of NPX at free pH. The effect of pH and some cationic metals allows considering this low-cost process in the elimination of this kind of emerging pollutants.Diplôme : Doctorat En ligne : ../theses/chimie/SET7532.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11371 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SET/7532 SET/7532 Thèse Bibliothèque principale Thèses Disponible Permalink