ABDELHAMID Guelil
قليل عبد الحميد
abdelhamid.ghelil@univ-msila.dz
+213660862478
- General Secretariat -- Faculty of Sciences
- Faculty of Sciences - Administrative Staff
- Grade Employee
About Me
Location
Ouled madhi, chelal
Msila, ALGERIA
Code RFIDE- 1985-03-29 00:00:00
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ABDELHAMID Guelil birthday
- 2025-09-01
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2025-09-01
The effect of low concentrations of selected metal ions (Al, Ag, Cu, Mn) on the properties of ZnO nanoparticles prepared by the co-precipitation technique
The effect of metal ion (MI) doping on the properties of zinc oxide nanoparticles (ZnO-NPs), was investigated. ZnO-NPs doped with a small amount (1.7 %) of Al, Ag, Cu, and Mn were successfully synthesized. X-ray diffraction (XRD) confirmed the retention of the hexagonal wurtzite structure after doping, with no secondary phases observed. A clear correlation was established between the ionic radii of the dopants and the consistent changes in the structural, vibrational and morphological properties. Ultraviolet–visible (UV–visible) spectroscopy showed a noticeable widening of the optical bandgap, shifting from 3.70 eV (ZnO) to 3.90 eV (Al-doping), 4.04 eV (Ag- doping), 3.88 eV (Cu- doping), and 3.97 eV (Mn- doping).
Citation
Rabie AMARI , Smail TERCHI , Djamel ALLALI , Bahri DEGHFEL , ABDELHAMID Guelil , AMMAR Boukhari , ELHADJ Benrezgua , Abdelhalim Zoukel, Ahmad Azmin Mohamad, , (2025-09-01), The effect of low concentrations of selected metal ions (Al, Ag, Cu, Mn) on the properties of ZnO nanoparticles prepared by the co-precipitation technique, Materials Letters, Vol:394, Issue:, pages:138677, Elsevier, Science Direct
- 2025-02-01
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2025-02-01
Synthesis of low-content Mn-doped ZnO thin films: Characterizations and density functional theory studies
This study aims to prepare manganese-doped zinc oxide (MZO) thin films with low Mn content (x = 0, 2, 4 %) using the sol–gel spin coating method and to characterize their structural, optical, and magnetic properties. Experimental techniques were complemented by Density Functional Theory calculations with Hubbard correction (DFT-LDA + U). All films exhibit a polycrystalline wurtzite hexagonal phase of ZnO. As the Mn doping increases, all diffraction peaks are getting weaker, which leads to deterioration in the crystallinity of the samples. Furthermore, Mn doping affects the grain size (57.44–38.20 nm), the surface morphology (rms: 45.24–30.47 nm), the transmittance (93–54 %) and the optical band gap energy (Eg: 3.27–3.18 eV). Photoluminescence spectra reveals ultraviolet peaks (386–395 nm) along with weak green (525 nm) and strong (438 nm) and weak (475 nm) blue peaks. DFT-LDA + U calculations exhibits an antiferromagnetic phase with slightly reduced Eg (3.379 eV for x = 0 % and 3.267 for 3.7 %), attributed to the influence of Mn3d states near the Fermi level. This study presents a comprehensive analysis of low-content Mn-doped ZnO thin films by combining experimental and theoretical approaches. The findings provide valuable insights into the electronic, structural, optical, and magnetic properties of MZO, emphasizing the critical role of Mn 3d states in altering the magnetic behavior and adjusting Eg.
Citation
ELHADJ Benrezgua , Rabie AMARI , AMMAR Boukhari , Djamel ALLALI , Smail TERCHI , Bahri DEGHFEL , ABDELHAMID Guelil , Abdelhalim Zoukel, Ahmad Azmin Mohamad, , (2025-02-01), Synthesis of low-content Mn-doped ZnO thin films: Characterizations and density functional theory studies, Inorganic Chemistry Communications, Vol:172, Issue:172, pages:113710, Elsevier, Science Direct