DEVELOPMENT OF A METHOD FOR OBTAINING A THIN TIO2 FILM WITH THE PHOTOELECTRIC PROPERTIES BY THE ELECTROCHEMICAL METHOD

Abstract

One of the most important sources of renewable energy worldwide is the use of solar energy, which is developing rapidly, and solar power plants are becoming part of the energy infrastructure of many countries. In this regard, titanium dioxide, which has photovoltaic properties, and is used in the conversion of solar energy into electrical energy, is widely used. Purpose is to develop a method for attaching nanostructured titanium dioxide, stable in aqueous solutions, to the surface of a metal titanium plate. Objects. The mechanism of titanium dioxide formation on the titanium surface has been studied by removing the potentiodynamic polarization curves of the anode-cathode cycle, and conducting electrolysis under the potentiostatic conditions. It is established that during anodic polarization, its oxides are formed on the surface of the titanium electrode in the solutions of sodium hydroxide (alkaline medium) and potassium sulfate (neutral medium). Results. The curves of the anode-cathode polarization of a titanium electrode in a solution of potassium sulfate with the concentration of 100 g/l have shown that an anode current appears in the region of the potentials +0.2 V. Conclusion. It has been shown that during anodic polarization of titanium in the solutions of sodium hydroxide and potassium sulfate, an oxide film forms on its surface. It is determined that the formation of a titanium dioxide film occurs at a very low rate under the conditions of transpassivation.