Browsing by Author "Salman, Waqed Khudayer Salman"
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thesis.listelement.badge FLAME AEROSOL SYNTHESIS AND CHARACTERIZATION OF PURE AND COPPER DOPED TITANIUM DIOXIDE(2022-01-20) Salman, Waqed Khudayer Salman; Ekinci Machin, NesrinRecently, applications of doped titanium dioxide nanoparticles are getting lot of attention from researchers. Especially nano-sized structures have found their way in the most promising research fields such as energy storage and production, carbon dioxide photo-reduction, pigments manufacturing, and water purification. Biggest interest is due to the enhanced characteristics of titania with better photocatalytic activity when it is doped. Flame Spray Pyrolysis (FSP) is one of the manufacturing methods in the production of nano TiO2, which is applied in this thesis. Operating parameters affect the morphology, crystallinity, optical properties, and the crystal phase of TiO2 in FSP production. TiO2, and 5 and 10 % copper doped TiO2 (Cu/TiO2) have been manufactured in a short residence time to avoid sintering. The products were characterized by X-ray diffraction (XRD), N2 adsorption-desorption analysis (BET), scanning electron microscopy (SEM), transmission and high resolution electron microscopy (TEM/HRTEM) analysis, and ultra violet- visible- diffuse reflectance spectroscopy (UV-vis- DRS), in order to understand their characteristics such as crystallinity, morphology, particle size distribution, surface area, crystal phase content and optical properties. Characterization results of pure and Cu doped TiO2 showed that, fine nanoparticles had been manufactured with a high surface area that increased with adding more copper. Rutile phase was found to be the dominating crystal phase. It has also been found that adding copper to TiO2 increased the band gap for the manufactured products in this work. The band gaps energy values for TiO2, 5 % Cu/TiO2 and 10 % Cu/TiO2 were found as 3.59, 3.79 and 3.85 eV respectively.