Department of Physics

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    Hydrothermal Synthesis of Nickel Doped Zinc Oxide (NixZn1-xO where x=0, 0.1, 0.2, 0.3, 0.4): Experimental and DFT Study of Structural, Electronic and Magnetic Parameters
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2022) Usman Zakir; CIIT/SP21-RPH-011/LHR; Prof. Dr. Muhammad Asif; LHR TP 8314
    Structural, electronic and magnetic properties of nickel doped zinc oxide (NixZn1-xO) are studied by employing both experimental as well as theoretical approach. Experimentally the Hydrothermal method was employed for the synthesis and different experimental characterizations were used to investigate its different properties. Theoretically we worked under the frame wok of DFT using approximations like LDA. XRD confirms the hexagonal structure of sample with lattice constant of 3.23804Å belonging to space group P63mc. FTIR spectrum revealed the absorption peak at 536 cm-1 which is due to octahedral site in the nickel doped zinc oxide. SEM was used for the investigation of surface morphology and showed the agglomeration with non- uniform particle sizes. Theoretically DFT was used and all work done using Local Density Approximation. It was revealed that LDA describes the non- magnetic structure of zinc oxide, further it can be clarified by DOS in spin up and spin down so net magnetic moment is almost zero
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    Synthesis of Co0.7Ni0.3Fe2O4/GO Composite Through Hydrothermal Method and Insight into the Physical Properties
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025) Anam Munir; CIIT/FA23-RPH-005/LHR; Dr. Mukhtar Ahmad; LHR TP 9840
    Hydrothermal method was used for the preparation of Cobalt-Nickel Ferrites/Graphene Oxide (Co0.7Ni0.3Fe2O4/GO) to study the physical properties. The goal of adding GO to the ferrite matrix was to improve the composite's optical, morphological, and structural properties. X-ray diffraction, Scanning Electron microscopy, UV-VIS Spectroscopy and RAMAN Spectroscopy was used to characterize the samples. A single-phase spinal structure was confirmed by XRD diffraction and lattice parameter was reduced from 8.40 Å to 8.25 Å.SEM micrographs showed nanoparticles are agglomerated and are non-uniform in size. The optical bandgap changed significantly increasing GO content, according to UV-Vis analysis, indicating increased optical absorption. The effective integration of the GO and ferrite phases was further confirmed by Raman spectra. These results demonstrate the promise of Co0.7Ni0.3Fe2O4/GO nanocomposites for innovative uses in water purification. However, there will be the study of the physiology fibrillation of the fluoride ions in the contaminated water with help to chemo sorption by the application of first order (PFO) and second order (PSO) model. This project’s findings also improved the experimental studies of Co0.7Ni0.3Fe2O4/GO composite