Electrochemical Method for Producing a TiO2 Film with Photocatalytic Properties
Фотокаталитикалық қасиетке ие TiO2 жабынын алудың электрохимиялық әдісі
Электрохимический способ получения пленки TiO2, обладающей фотокаталитическими свойствами
Bayeshov A. Kadirbayeva A.S. Bayeshova A.K. Zharmenov A.A.
2022E.A.Buketov Karaganda State University Publish House
Bulletin of the Karaganda University Chemistry Series
2022#108Issue 4152 - 161 pp.
The purpose of this work is to study the production process of titanium dioxide during anode polarization in sulfuric acid and hydrochloric acid solutions. The studies were carried out by recording cyclic voltammogram and by measuring the titanium oxidation current with a change in the voltage between the electrodes. It has been established that with a change in the concentration of sulfuric acid in the range of 50–250 g/l and the voltage between the electrodes in the range of 0–25 V, the magnitude of the titanium oxidation current increases and reaches 29.4 mA. With an increase in the concentration of hydrochloric acid from 35 to 100 g/l and a change in the voltage between the electrodes, the titanium oxidation rate increases evenly, but in the voltage range of 10–12 V, a sharp increase in the current magnitude up to 360 mA is observed. A change in the oxidation current indicates an increase in the rate of titanium dissolution. With an increase in the duration of electrolysis, the magnitude of the anode current generally decreases. In all probability, at a voltage of 14 V and higher, a breakdown of the oxide semiconductor film of titanium dioxide is observed in the hydrochloric acid solution. In this regard, a noticeable dissolution of titanium occurs and, subsequently, an oxide film is not produced, but titanium ions are produced. Visual observations have shown that titanium passes into solution in the form of titanium (IV).
coating , electrode , electrolyzer , hydrochloric acid , polarization , sulfuric acid , titanium dioxide , voltage
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Chemical Science, The National Academy of Sciences of the Republic of Kazakhstan, Republican State Enterprise “National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”, Karasay batyr Street, 111–113, Almaty, 050012, Kazakhstan
Republican State Enterprise “National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”, MTF-2 Street, 44/1, Almaty, 040998, Kazakhstan
Technical Sciences, Al-Farabi Kazakh National University, Almaty, 050012, Kazakhstan
Technical Sciences, The National Academy of Sciences of the Republic of Kazakhstan, Republican State Enterprise “National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”, Zhandosov Street, 67, Almaty, 050036, Kazakhstan
Chemical Science
Republican State Enterprise “National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”
Technical Sciences
Technical Sciences
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