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Full Length Article | Open Access

Effect of TiO2 nanoparticles on the photocatalytic properties of PEO coatings on Mg alloy

D.V. Mashtalyara, I.M. Imshinetskiya( ), K.V. Nadaraiaa, A.S. Gnedenkova, S.N. Suchkova, D.P. Opraa, E.V. Pustovalovb, A. Yu Ustinova, S.L. Sinebryukhova, S.V. Gnedenkova
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia
Far Eastern Federal University, Vladivostok, 690950, Russia
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Abstract

A comprehensive study of the properties of coatings formed on a magnesium alloy by plasma electrolytic oxidation (PEO) using the electrolytes with nanosized particles of anatase (titanium dioxide) has been carried out. Formed coatings reduce corrosion current density 2.5-fold and increase hardness by 25% compared to a coating without particles. Confocal micro-Raman spectroscopy revealed the presence of anatase and rutile phases in the composition of PEO coating due to the incorporation of TiO2 nanoparticles during plasma electrolytic treatment. The presence of titanium dioxide had a positive effect on the photocatalytic properties of coatings: the constant rate of the methyl orange and methyl blue decomposition is increased in 1.6 and 1.8-fold, respectively, compared to the coating formed in electrolyte without TiO2 particles.

Keywords

Plasma electrolytic oxidationNanoparticlesTitanium dioxidePhotocatalysisProtective coatings

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Journal of Magnesium and Alloys
Volume 11 Issue 2,
February 2023
Pages 735-752
DOI: 10.1016/j.jma.2022.10.021

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Mashtalyar D, Imshinetskiy I, Nadaraia K, et al. Effect of TiO2 nanoparticles on the photocatalytic properties of PEO coatings on Mg alloy. Journal of Magnesium and Alloys, 2023, 11(2): 735-752. https://doi.org/10.1016/j.jma.2022.10.021

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Received: 14 July 2022
Revised: 20 October 2022
Accepted: 30 October 2022
Published: 08 December 2022
© 2022 Chongqing University.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer review under responsibility of Chongqing University