Structure and Photocatalytic Properties of Fixed Porous TiO<sub>2</sub> Composite Film on Steel Prepared by Plasma Electrolytic Oxidation

TiO2 composite photocatalytic film was fixed on steel by by plasma electrolytic oxidation. The microstructure of the composite film were investigated by XRD, EDS and SEM. The photocatalytic properties of the film were studied by testing the photocatalytic degradation of Rhodamine B. The results showed that the ceramic film was composed of A-TiO2 and R-TiO2. The EDS revealed that the film consisted Ti, O, Si and Fe elements. The SEM pictures showed that the film surface was rough and porous. The photocatalytic experiment results showed that the the TiO2 composite film fixed on steel by plasma electrolytic oxidation exhibited relatively high photocatalytic photodegradation of Rhodamine B, whose removal ratio reached 90% in 2 hours, irradiation of ultraviolet light.