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Thin Functional Films of TiO2 Nanoparticles
Morozová, Magdalena ; Klusoň, Petr ; Hejda, S. ; Kment, Štěpán ; Šolcová, Olga
Magnetron Sputtering and the Modulated Hollow Cathode Plasma Jet Sputtering. As chemical method the sol-gel process carried out in the templating environment as dip-coating and piezo-jet printing was employed. The produced films differed in many structural characteristics and also in their photoelectrochemical behaviour, as the primary sought function. The produced layers were described by means of atomic force microscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, Raman spectroscopy, ellipsometry and profilometry. Then the films were used as electrodes in photoelectrochemical experiments.
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Preparation of ZnO Layers by Surfatron with Possible Photo-Catalytic Usage
Dytrych, Pavel ; Slater, M. ; Klusoň, Petr ; Churpita, Olexandr ; Hubička, Zdeněk ; Čada, Martin ; Morozová, Magdalena ; Zita, B. ; Krýsa, J. ; Straňák, Vítězslav
Pecvd method in this contribution we deal with the preparation of thin layers of ZnO, which exhibit interesting photo-sensitive properties. ZnO functional layers were prepared by surfatron by a PECVD method.
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Photoelectrochemical Oxidation of Carboxylic Acids on the Sol-Gel Thin TiO2 Layer Electrode
Morozová, Magdalena ; Klusoň, Petr ; Krýsa, Josef ; Šolcová, Olga
Heterogeneous photocatalysis is based on the reaction between the light excitated semiconductor and oxidizable compound adsorbed on the catalytic surface. This work reports the photoelectrocatalytic oxidation characteristics of carboxylic acids on the TiO2 sol-gel thin-film electrode by using electrochemical techniques. The influence of the thickness of the films on photoactivity and the various concentrations of oxalic, formic and acetic acid in the supporting electrolyte were investigated. The effect of the used mono- and dicarboxylic acids on the electrode behaviour for possible application as sensors has been also studied. The surface characteristics of TiO2 films were determined by XRD, SEM and AFM analyses and the photoexcitation properties of nanoparticulate layer electrode were determined by cyclic and linear voltammetry, amperometry and open circuit potential (OCP).
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