omerelsheikh

omerelsheikh

مدرس - عضو هيئة تدريس

كلية العلوم

العنوان: Sohag

1

إعجاب

المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: X-ray diffraction


Impact of rare earth europium (RE-Eu3+) ions substitution on microstructural, optical and magnetic properties of CoFe2−xEuxO4 nanosystems
In this study, pure cobalt ferrite (CoFe2O4) nanoparticles and europium doped CoFe2O4 (CoFe2−xEuxO4; x = 0.1, 0.2, 0.3) nanoparticles were synthesized by the precipitation and hydrothermal approach. The impact of replacing trivalent iron (Fe3+) ions by trivalent rare earth europium (RE-Eu3+) ions on the microstructure, optical and magnetic properties of the produced CoFe2O4 nanoparticles was studied. X-ray diffraction (XRD) and ... إقراء المزيد

2018-10-31 22:15:01 الكلمات المفتاحية Iron oxides, Potentiostatic, X, Iron oxides, Potentiostatic, X-ray diffraction, Removal of lead, Water treatment,
A Promising Electrodeposited Iron Oxide Nanoparticles of Very High Saturation Magnetization and Superparamagnetic Properties for Remediation of Polluted Water with Lead Ions
For the first time, iron oxide nanoparticles (NPs) with very high saturation magnetization (Ms = 283 emu/g) and superparamagnetic properties compared with other published data are successfully obtained via a facile electrochemical method. Iron oxide nanoparticles (NPs) are fabricated by electro-reduction of the ferric-triethanolamine complex in an alkaline medium but at certain optimized conditions. Here, the electro-deposition pathway of iron ... إقراء المزيد

2018-10-11 09:41:22 الكلمات المفتاحية optical properties, Field-emission sem, X-ray diffraction, Bi2Te2.7Se0.3 nanoparticles,
Effect of the synthesis conditions on the structural, morphological and optical properties of Bi2Te2. 7Se0. 3 nanoparticles
Beside their promising utility as thermoelectric generators, Bi2Te3 and related compounds have several applications in electronic and optoelectronic devices. In this work, Bi2Te2.7Se0.3 nanoparticles (NPs) were successfully prepared via physical vapor deposition technique at different conditions of flow rate and temperature. The x-ray diffraction patterns show that, the NPs crystallize in a rhombohedral crystal structure with preferable growth along the ... إقراء المزيد

2018-09-30 20:47:45 الكلمات المفتاحية Metal alloys, anodic dissolution, passivation, Electron microscopy, X-ray diffraction,
Effect of nickel content on the anodic dissolution and passivation of zinc–nickel alloys in alkaline solutions by potentiodynamic and potentiostatic techniques
The effect of systematic increase of Ni on the anodic dissolution and passivation of Zn–Ni alloys in var-ious concentrations of KOH solution (0.1–1 M) was investigated. The anodic dissolution and passivation behaviourfor each pure Zn and Ni in the same studied solutions was also investigated, and the obtained data were compared.Potentiodynamic and potentiostatic methods were used, and the corrosion layer ... إقراء المزيد

Synthesis, characterization and photocatalysis enhancement of Eu2O3-ZnO mixed oxide nanoparticles
Pure ZnO nanoparticles (NPs) and mixed Eu2O3 and ZnO NPs with different Eu2O3 ratios (5%, 10%, and 15%) were synthesized by a precipitation method under optimum conditions. The synthesized samples were characterized by means of X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and UV–vis diffuse reflectance spectroscopy. ... إقراء المزيد