Characterization and photocatalytic activity of Ti/TinOm ∙ ZrxOy coatings for azo-dye degradation

Nickolay Sakhnenko 1 , Marina Ved 1 , Victoria Bykanova 1 ,  and Kostiantyn Nikiforow 2
  • 1 Department of Physical Chemistry, The National Technical University of Ukraine, “Kharkov Polytechnic Institute”, Kharkov 61002, Ukraine
  • 2 Department of Soft Condensed Matter and Fluids, Institute of Physical Chemistry Polish Academy of Sciences, Warsaw 02-224, Poland

Abstract

Anodic oxidation of VT1-0 titanium and E-125 zirconium alloy in aqueous electrolyte solutions based on H2SO4 and K4P2O7 was used to obtain oxide coatings composed of Zr/ZrO2, Ti/TiO2, and mixed oxide systems Ti/TinOm ∙ ZrxOy. It was shown that, depending on the electrolyte рН, the films contained from 0.17 to 2.1% wt. of zirconium. The catalytic activity of the synthesized coatings in the oxidation reaction of the methyl orange azo dye under UV irradiation was established. The process rate constants and synergy factors for the mixed systems were calculated.

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