Photocatalytic activity of TiO 2 film containing Fe 2 O 3 via plasma electrolytic oxidation

Abstract

This study investigated the photocatalytic activity of an Fe containing TiO₂ film produced in the FePO₄ electrolyte via the plasma electrolytic oxidation (PEO) method. For this purpose, the PEO process was carried out on titanium substrate under ac condition in two different alkaline electrolytes containing K₃PO₄ and FePO₄ respectively. The structure, chemical composition and constituent phases of the PEO treated samples were analysed via SEM, X-ray photoelectron spectroscopy and X-ray diffraction. The optical properties of the samples were also examined by an ultraviolet–visible spectrophotometer. In terms of the photocatalytic activity judging from the decomposition of methylene blue under visible light illumination, the sample formed in the FePO₄ electrolyte was better than that in the K₃PO₄ electrolyte due to the incorporation of an Fe compound that has a narrow band gap.

Keywords

Titanium Plasma electrolytic oxidation Photocatalytic activity

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