الفهرس 
Introductory remarks about ferritesOnly 14 pages are availabe for public view
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Abstract
The interaction between the organic polymer and the inorganic ferrite nanoparticles can be produced by combining the properties of each component or by introducing new properties from the other component. The incorporation of PANI was completed via in-suit-polymerization of aniline using both K2S2O8, MnxFe3−xO4 and CuxFe3-xO4 as oxidants. The goal of this study is to prepare and characterize PANI, MnxFe3-xO4/PANI, and CuxFe3-xO4/polyaniline nanocomposites. MnxFe3−xO4 /PANI nanocomposites were used as adsorbents for anionic dyes such as Lanaset brown B (LBB). Moreover, the catalytic activities of CuxFe3-xO4/polyaniline nanocomposites towards the oxidative degradation of Lanaset Green B (LGB). In addition, a study was performed on the antimicrobial effects of CuxFe3-xO4/PANI nanocomposites against several microbes, including Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Candida albicans. This thesis contains three chapters The first chapter comprehends an introduction of spinel ferrite including methods of fabrication, structure models, and properties. It also contains a literature survey of PANI, MFe2O4, MFe2O4/ PANI, wastewater treatment, and methods of water purification. The second chapter consists of the experimental part which describes the materials and instruments that have been used. It also includes the synthesis of PANI, MnxFe3−xO4, CuxFe3-xO4, MnxFe3−xO4/ PANI, and CuxFe3-xO4/PANI nanocomposites. MnxFe3−xO4, CuxFe3-xO4, MnxFe3−xO4/PANI, CuxFe3-xO4/PANI nanocomposites were prepared by were synthesized via ii chemical co-precipitation and in situ oxidative polymerization methods of aniline in the presence and absence of K2S2O8 as an oxidant using different spinel ferrites nanoparticles with various Mn2+ and Cu+2 ratios. The adsorp-tion isotherm studies, the kinetic measurements, and the antimicrobial activity of the nanocomposites are also included. The third chapter comprises the results and discussion. It contains the characterization of PANI, MnFe2O4, CuFe2O4, MnxFe3−xO4/PANI, and CuxFe3-xO4/PANI nanocomposites and systematically displays the results. These nanocomposites were analyzed by Fourier transform infrared spectra (FT-IR), X-ray powder diffraction (XRD), Vibrating sample magnetometer (VSM), Scanning electron microscopy (SEM), Energy-dispersive X-ray (EDX), Transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), High angle annular dark field (HAADF), and X-ray photoelectron (XPS). XRD results of MnxFe3−xO4/PANI nanocomposites confirmed the formation of a single-phase cubic spinel structure with a lattice constant of approximately 8.312 Å. The surface enriched by Mn exhibited an enhanced valence of +3 and +4, increased lattice oxygen content, facilitated ferrite reduction, and improved the oxidative performance of Fe3+. These properties enhance the ability of MnFe2O4 nanoparticles for the polymerization of aniline. The saturation magnetization decreased with an increase in both Mn+2 ratios and PANI contents, with values of 37.79 and 13.67 emu/g for x = 0.1 and 1.0, respectively. XRD data from CuxFe3-xO4/PANI nanocomposites indicated the existence of one-phase cubic spinel structures with lattice constants. The saturation magnetization decreased with increasing Cu+2 ratios and PANI contents, with values of 13.67 and 8.7 emu/g for x = 0.1 and 1.0, respectively.