Synthesis and study of oxide PEO-coatings containing Fe, Co and W on titanium

Authors

  • Yulia B. Budnikova Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Marina S. Vasilyeva Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Valerii G. Kuryavyi Institute of Chemistry, FEB RAS, Vladivostok, Russia

Keywords:

plasma electrolytic oxidation, titanium, tungstates of cobalt and iron, optoelectronic properties, methyl orange degradation

Abstract

Fe-, Со-, and W-containing oxide coatings on the titanium were formed by plasma-electrolytic oxidation in tungstate electrolytes containing ions Fe(II)-EDTA and/or Co(II)-EDTA. The obtained composites were studied by diffuse reflection, scanning electron microscopy, X-ray phase and energy dispersion analyses. All formed coatings contain TiO2 in the anatase modification and WO3. The oxide layers obtained in a tungstate electrolyte with the addition of only Co(II)-EDTA ions additionally contain CoWO4. The values of the band gap for the obtained composites, determined by the Tauc method for direct allowed transitions, amounted to 2.5–2.8 eV. The formed composites exhibit photocatalytic activity in the degradation of methyl orange (10 mg/l, pH 6.8, С(Н2О2) = 10 mmol/l) under UV and visible light irradiation.

Author Biographies

Yulia B. Budnikova, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Category 1 Engineer

Postgraduate student (Far Eastern Federal University, Vladivostok, Russia) 

https://orcid.org/0000-0002-8716-8986

Marina S. Vasilyeva, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Doctor of Science in Chemistry, Leading Researcher 

Professor (Far Eastern Federal University, Vladivostok, Russia)

https://orcid.org/0000-0002-6716-1373

Valerii G. Kuryavyi, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Senior Researcher Candidate of Sciences in Chemistry

Downloads

Published

2022-12-07

How to Cite

Budnikova Ю. Б. ., Vasilyeva М. С., & Kuryavyi В. Г. (2022). Synthesis and study of oxide PEO-coatings containing Fe, Co and W on titanium. Vestnik of the Far East Branch of the Russian Academy of Sciences, (6), 26–34. Retrieved from http://vestnikdvo.ru/index.php/vestnikdvo/article/view/1018

Issue

No. 6 (2022)

Section

Physicochemistry of surface and nanosized systems