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Preparation and characterization of the photocatalytic active TiO2 nanoparticles
Volfová, Lenka ; Nižňanský, Daniel (advisor) ; Lančok, Adriana (referee)
Bachelor thesis Preparation and characterization of the photocatalytic active TiO2 nanoparticles Lenka Volfová 2015, ABSTRACT The present work concerns the preparation of photocatalytically active TiO2 nanoparticles, their characterization and study of their photocatalytic properties. The colloidal solution was obtained by hydrolysis of aqueous solutions of TiOSO4. The samples were lyophilized and the product was annealed at 500 řC, 650 řC, 800 řC and 950 řC. The microstructure, morphology and other characteristics of the products were analysed by several physical and chemical methods: X-ray, EPR, SEM, HRTEM and BET. The measurements of IR, UV/VIS and DTA spectra have also been carried out. Photocatalytic activities were investigated by measurement of kinetics of degradation of 4-chlorophenol or methylene blue aqueous solutions under UV light. Measurement of photocatalytic activity of the samples was compared with the standard Degussa P25. It was found that the efficiency of the samples was higher than the standard. Keywords: hydrolysis, titania nanoparticles, microstructure, photocatalytic activity, photocatalytic degradation
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