Preparation of some nano-metal aluminates and studying their structures and analysis of their constituents for use in water treatment / Shimaa Mahmoud Abass Aboueata ; Supervised Mohamed Abdelgawad Zayed , Mohamed Mohamed Rashad Elsherbeny

Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical Chemistry

Sol- gel is used for preparation of zinc aluminate nanomaterials doped with copper in presence of glycine as a chelating agent with different molar ratios (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) and co-doped with C/Cu (II). The formed nano- powders were investigated using EDX, XRF, XRD and HR-TEM and studying their optical properties using UV spectrum and photoluminescence (PL). The prepared nano-powders were developed by loading them with carbon spheres. Then, they were investigated using all the previous instruments to be found that there is a decrease in the crystal size and optical band gap. From that; it is an evidence there is a great combination between CSs and Zn(1-x)Cu(x)Al2O4 (x =0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 molar ratios). The importance of the present work stems from the success of development of optical properties of modified zinc aluminate semiconductor doped with Cu ion and co-doped with C/Cu and consequently more optical and industrial applications. The co-doping of semi-conductors usually very efficient in changing its energy gap and consequently its optical activity as proved in this research. It is also proved that the presence of glycine as chelating agent help efficiently doping and co-doping process and consequently efficiently changing characters of the studied and newly prepared zinc aluminate semiconductor by sol-gel method

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