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Study of electrophotocatalytic water disinfenction
Cisáriková, Barbora ; Zita, Jiří (referee) ; Veselá, Mária (advisor)
This bachelor thesis was focused on the photocatalytic disinfection of water with titanium dioxide applied to the working electrode. The experiment was conducted under normal conditions, with the application of UV-radiation with intensity of 40 W/m2 and with UV radiation and of 1 V electrical voltage at the same time. Each part of the experiment was run for 60 and 120 minutes. The microbicidal effect was monitored on Escherichia coli bacteria.
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Fabrication of conductive paths by electroless plating of printed precursors
Kováčová, Silvia ; Zita, Jiří (referee) ; Dzik, Petr (advisor)
The subject of this bachelor thesis is the preparation of conductive tracks by electroless plating of printed precursors. The experimental part deals with the preparation of standard samples based on the length of immersion time in the coppering bath. The precursor layers were applied with a technical pen to ceramic corundum substrates. The individual precursor layer substrates were immersed in the coppering bath in various time intervals. The structure of the grown copper layers was observed by an optical microscope and their thickness was determined by a profilometer.
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Plasmochemical treatment of photoanodes with semiconducting oxide layer
Ďurašová, Zuzana ; Zita, Jiří (referee) ; Dzik, Petr (advisor)
This diploma thesis deals with a plasmochemical treatment of photoanodes with an active layer containing TiO2 deposited on two different substrates by material printing. The plasmochemical treatment was performed by a low-temperature ambient-air plasma using a diffuse coplanar surface barrier discharge (DCSBD). The experimental part is focused on the investigation of DCSBD influence on the fabricated photoanodes photoelectrochemical properties, and the influence of plasma treatment time. Process optimization was achieved by height adjustment of the electrode. The processed coatings were electrochemically investigated by linear sweep voltammetry and chronoamperometry.
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Kinetics of electrophotocatalytic water disinfection
Štefancová, Eva ; Zita, Jiří (referee) ; Veselá, Mária (advisor)
In this work, electrophotocatalytic disinfection on selected microorganisms was verified. The electrophotocatalytic system allows the application of electrical bias to the photoanode coated with a titanium dioxide layer. The disinfecting effect was observed on E.coli and C.glabrata in aqueous solution. The effect of radiation intensity on electrophotocatalysis and selected optimal conditions for further experiments was observed in the E. coli organism. Photocatalytic disinfection was carried out under suitable conditions on C.glabrata yeast and the effect of sodium sulfate electrolyte on electrophotocatalytic disinfection was observed in this case.
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Fabrication of conductive paths by electroless plating of printed precursors
Kováčová, Silvia ; Zita, Jiří (referee) ; Dzik, Petr (advisor)
The subject of this bachelor thesis is the preparation of conductive tracks by electroless plating of printed precursors. The experimental part deals with the preparation of standard samples based on the length of immersion time in the coppering bath. The precursor layers were applied with a technical pen to ceramic corundum substrates. The individual precursor layer substrates were immersed in the coppering bath in various time intervals. The structure of the grown copper layers was observed by an optical microscope and their thickness was determined by a profilometer.
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Kinetics of electrophotocatalytic water disinfection
Štefancová, Eva ; Zita, Jiří (referee) ; Veselá, Mária (advisor)
In this work, electrophotocatalytic disinfection on selected microorganisms was verified. The electrophotocatalytic system allows the application of electrical bias to the photoanode coated with a titanium dioxide layer. The disinfecting effect was observed on E.coli and C.glabrata in aqueous solution. The effect of radiation intensity on electrophotocatalysis and selected optimal conditions for further experiments was observed in the E. coli organism. Photocatalytic disinfection was carried out under suitable conditions on C.glabrata yeast and the effect of sodium sulfate electrolyte on electrophotocatalytic disinfection was observed in this case.
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Study of electrophotocatalytic water disinfenction
Cisáriková, Barbora ; Zita, Jiří (referee) ; Veselá, Mária (advisor)
This bachelor thesis was focused on the photocatalytic disinfection of water with titanium dioxide applied to the working electrode. The experiment was conducted under normal conditions, with the application of UV-radiation with intensity of 40 W/m2 and with UV radiation and of 1 V electrical voltage at the same time. Each part of the experiment was run for 60 and 120 minutes. The microbicidal effect was monitored on Escherichia coli bacteria.
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Plasmochemical treatment of photoanodes with semiconducting oxide layer
Ďurašová, Zuzana ; Zita, Jiří (referee) ; Dzik, Petr (advisor)
This diploma thesis deals with a plasmochemical treatment of photoanodes with an active layer containing TiO2 deposited on two different substrates by material printing. The plasmochemical treatment was performed by a low-temperature ambient-air plasma using a diffuse coplanar surface barrier discharge (DCSBD). The experimental part is focused on the investigation of DCSBD influence on the fabricated photoanodes photoelectrochemical properties, and the influence of plasma treatment time. Process optimization was achieved by height adjustment of the electrode. The processed coatings were electrochemically investigated by linear sweep voltammetry and chronoamperometry.
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Photocatalytic inactivation of yeasts
Šupinová, Lenka ; Zita, Jiří (referee) ; Veselá, Mária (advisor)
This diploma thesis is focused on the study of the effect of ultraviolet radiation and titanium dioxide on the yeast Candida vini. Photocatalytic inactivation of this yeast was performed on various types of titanium dioxide films, which were immobilized on soda lime glasses. Acridine orange was used as a dye to distinguish live and dead yeast cells after certain irradiation time. Live and dead cells emit different light in colour after staining in acridine orange. Candida vini photocatalytic inactivation depends on the amount of titanium dioxide immobilized on glass as well as on the structure of its surface if the lamp intensity remains the same. Kinetics of this photocatalytic process was studied, too.
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