Titre :	L'effet de la concentration de l’extrait de plante (figuier de barbarie) sur les propriétés des nanoparticules d’oxydes de Cuivre
Type de document :	texte imprimé
Auteurs :	Abd El Djalil Fettache, Auteur ; Fatima Latreche, Auteur ; Smail Boudjadar, Directeur de thèse
Editeur :	CONSTANTINE [ALGERIE] : Université Frères Mentouri Constantine
Année de publication :	2017
Importance :	60 f.
Format :	30 cm.
Note générale :	une copie electronique PDF disponible en BUC
Langues :	Français (fre)
Catégories :	Sciences Exactes:Physique
Tags :	nanoparticules  sythese verte oxyetes de cuivre
Index. décimale :	530 Physique
Résumé :	In recent years, the synthesis of metal oxides nanoparticles by biological methods has received more attention; as an eco-friendly and cost effective alternative approaches. In this work we studied the effect of the concentration of the aqueous extract of the barberry fig plant on the properties of copper oxides nanoparticles synthesized from copper sulfate and sodium hydroxide as a precursor and catalytic agent respectively. The X-ray analysis shows the existence of four crystalline phases: Cu2O, CuO, Cu(OH)2 and CuNa2(OH)4 whose grain sizes vary from 28 to 42 nm, approximately 19 nm, 17 nm and 38 to 44 nm respectively. Scanning electron microscopy shows what appears to be a needle shape of an agglomeration with a spherical tendency of nanoparticles of copper oxides. The Raman analysis shows the appearance of the peaks (Ag + Bg) of CuO and a single T2g peak of Cu2O. From the FT-IR analysis, the band located about 500 cm -1is attributed to the Cu-O bond in asymmetric stretching mode. The UV-visible spectra present a strong absorption for all the samples in the visible and indicate that we have two energies of gap: the first characterizes copper oxide whose gap is about 1.2 eV, the second is about 3.16 eV corresponding to cuprous oxide. However, the involuntary appearance of four phases makes the material very active in technological applications, especially in photocatalysis and antibacterial testing.
Diplome :	Master 2
Permalink :	https://bu.umc.edu.dz/master/index.php?lvl=notice_display&id=3516

L'effet de la concentration de l’extrait de plante (figuier de barbarie) sur les propriétés des nanoparticules d’oxydes de Cuivre [texte imprimé] / Abd El Djalil Fettache, Auteur ; Fatima Latreche, Auteur ; Smail Boudjadar, Directeur de thèse . - CONSTANTINE [ALGERIE] : Université Frères Mentouri Constantine, 2017 . - 60 f. ; 30 cm.
une copie electronique PDF disponible en BUC
Langues : Français (fre)

Catégories :	Sciences Exactes:Physique
Tags :	nanoparticules  sythese verte oxyetes de cuivre
Index. décimale :	530 Physique
Résumé :	In recent years, the synthesis of metal oxides nanoparticles by biological methods has received more attention; as an eco-friendly and cost effective alternative approaches. In this work we studied the effect of the concentration of the aqueous extract of the barberry fig plant on the properties of copper oxides nanoparticles synthesized from copper sulfate and sodium hydroxide as a precursor and catalytic agent respectively. The X-ray analysis shows the existence of four crystalline phases: Cu2O, CuO, Cu(OH)2 and CuNa2(OH)4 whose grain sizes vary from 28 to 42 nm, approximately 19 nm, 17 nm and 38 to 44 nm respectively. Scanning electron microscopy shows what appears to be a needle shape of an agglomeration with a spherical tendency of nanoparticles of copper oxides. The Raman analysis shows the appearance of the peaks (Ag + Bg) of CuO and a single T2g peak of Cu2O. From the FT-IR analysis, the band located about 500 cm -1is attributed to the Cu-O bond in asymmetric stretching mode. The UV-visible spectra present a strong absorption for all the samples in the visible and indicate that we have two energies of gap: the first characterizes copper oxide whose gap is about 1.2 eV, the second is about 3.16 eV corresponding to cuprous oxide. However, the involuntary appearance of four phases makes the material very active in technological applications, especially in photocatalysis and antibacterial testing.
Diplome :	Master 2
Permalink :	https://bu.umc.edu.dz/master/index.php?lvl=notice_display&id=3516