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Preparation of Stuctured Thin Layers of Titanium Dioxide
Lukešová, Magdalena ; Jančovičová, Viera (oponent) ; Veselý, Michal (vedoucí práce)
The aim of this work is to prepare titanium dioxide thin films, to study their photocatalytic activity and photoinduced hydrophilic properties. Transparent titanium dioxide films were prepared on soda-lime glass support by sol-gel method using titanium(IV)isopropoxide. Piezoelectric deposition was involved as a coating technique. TiO2 sol was synthesized with a structure-directing and pore generating agent, polyethylene glycol (PEG) and acetylacetone (AcAc) as a complexing agent to control the hydrolysis and condensation reactions. The TiO2 films were active in the photooxidation of 2,6-dichloroindophenol as resulted from the formal first order rate constant calculation. Also influence of ultraviolet light on the film hydrophility was studied by contact angle (CA) measurements. The prepared films became superhydrophilic after UV-light irradiation.
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Sol-gel process using reverse micelles
Lukešová, Magdalena ; Čeppan, Michal (oponent) ; Veselý, Michal (vedoucí práce)
This study describes preparation of transparent thin films of titanium dioxide by sol-gel process with reverse micelles, which represent a unique system for production of uniform particles. A non-ionic surfactant was used as a templating agent. Material printing as a specialized inkjet printing technique was used to prepare titania thin films of 1–4 layers. After calcination the prepared films of titanium dioxide were characterised by band gap energy. The structure of the films was described by optical microscopy and SEM. Photocatalytic activity was verified by oxidation reaction of 2,6-dichloroinfophenol and by degradation of stearic acid directly printed on the active layers. Photo-induced hydrophilicity was characterised by contact angle measurement of water wettability. Photocatalytic efficiency of prepared films increased with increasing number of titania layers.
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Sol-gel process using reverse micelles
Lukešová, Magdalena ; Čeppan, Michal (oponent) ; Veselý, Michal (vedoucí práce)
This study describes preparation of transparent thin films of titanium dioxide by sol-gel process with reverse micelles, which represent a unique system for production of uniform particles. A non-ionic surfactant was used as a templating agent. Material printing as a specialized inkjet printing technique was used to prepare titania thin films of 1–4 layers. After calcination the prepared films of titanium dioxide were characterised by band gap energy. The structure of the films was described by optical microscopy and SEM. Photocatalytic activity was verified by oxidation reaction of 2,6-dichloroinfophenol and by degradation of stearic acid directly printed on the active layers. Photo-induced hydrophilicity was characterised by contact angle measurement of water wettability. Photocatalytic efficiency of prepared films increased with increasing number of titania layers.
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Preparation of Stuctured Thin Layers of Titanium Dioxide
Lukešová, Magdalena ; Jančovičová, Viera (oponent) ; Veselý, Michal (vedoucí práce)
The aim of this work is to prepare titanium dioxide thin films, to study their photocatalytic activity and photoinduced hydrophilic properties. Transparent titanium dioxide films were prepared on soda-lime glass support by sol-gel method using titanium(IV)isopropoxide. Piezoelectric deposition was involved as a coating technique. TiO2 sol was synthesized with a structure-directing and pore generating agent, polyethylene glycol (PEG) and acetylacetone (AcAc) as a complexing agent to control the hydrolysis and condensation reactions. The TiO2 films were active in the photooxidation of 2,6-dichloroindophenol as resulted from the formal first order rate constant calculation. Also influence of ultraviolet light on the film hydrophility was studied by contact angle (CA) measurements. The prepared films became superhydrophilic after UV-light irradiation.
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