Photoelectrochemical properties of sol–gel obtained titanium oxide

The photoelectrochemical properties of a sol–gel prepared titanium oxide coating applied onto a Ti substrate were investigated. The oxide coating was formed from an inorganic sol thermally treated in air at 350 °C. The coating consisted of agglomerates of narrow size distribution around 100 nm. The photoelectrochemical characteristics were evaluated by investigating the changes in the open circuit potential, current transients and impedance characteristics of a Ti/TiO2 electrode upon illumination by UV light in H2SO4 solution and in the oxidation of benzyl alcohol. The electrode was found to be active for photoelectrochemical reactions in the investigated solutions

Fifth European Dirofilaria and Angiostrongylus Days (FiEDAD) 2016

Peer reviewe

Electrocatalytic properties and stability of titanium anodes activated by the inorganic sol–gel procedure

The properties of activated titanium anodes, RuO2–TiO2/Ti and RuO2–TiO2–IrO2/Ti, prepared from oxide sols by the sol–gel procedure, are reviewed. RuO2 and TiO2 sols were synthesized by forced hydrolysis of the corresponding chlorides in acid medium. The morphology of the prepared sols was investigated by transmission electron microscopy. The chemical composition of the RuO2 sol was determined by X-ray diffraction and thermogravimetric analysis. The loss of electrocatalytic activity of a RuO2–TiO2/Ti anode during an accelerated stability test was investigated by examination of the changes in the electrochemical characteristics in the potential region of the chlorine and oxygen evolution reaction, as well as on the open circuit potential. These electrochemical characteristics were investigated by cyclic voltammetry, electrochemical impedance spectroscopy and polarization measurements. The changes in electrochemical characteristics of the anode prepared by the sol–gel procedure were compared to the changes registered for an anode prepared by the traditional thermal decomposition of metal chlorides. The comparison indicated that the main cause for the activity loss of the sol–gel prepared anode was the electrochemical dissolution of RuO2, while in the case of thermally prepared anode the loss was mainly caused by the formation of an insulating TiO2 layer in the coating/Ti substrate interphase. The results of an accelerated stability test on RuO2–TiO2/Ti and RuO2–TiO2–IrO2/Ti anodes showed that the ternary coating is considerably more stable than the binary one, which is the consequence of the greater stability of IrO2 in comparison to RuO2

Konflikthantering genom drama : En studie om dramats roll i undervisningen

Abstract The purpose of the essay was to investigate how you can work with conflict management through drama, to promote the meeting with children from many different cultures. I also wanted to see how the work may be different in a heterogeneous or homogeneous group of children. In the background I lift up what a conflict can be, what kind of conflict management methods there are, how to work with drama education as well as what ethnic conflicts can be. The literature studies have shown that there are different types of conflicts and that the conflict management methods are many. In an attempt to get answers to my questions I’ve had drama lessons focusing on conflicts in a heterogeneous and homogeneous group of children in grades 3. My study has shown that conflict management through drama can increase the understanding of other cultures and promote the meeting between children. Just as the literature describes conflicts, they can be difficult to solve and it is important to find a method that suits the class you work with. Key- words: conflict, conflict management, drama, homogeneous, heterogeneous