Preparation and Characterization of TiO 2 Photocatalytic Thin Film and Its Compounds by Micro-Arc Oxidation Technique

Abstract

Mesoporous TiO2 ceramic films have been prepared upon the Ti alloy substrate by the micro-arc\roxidation (MAO) technology. To enhance the photo-catalytic property of the\rfilms, Eu2O3 particles were added into the electrolyte\rsolution of Na2CO3/Na2SiO3.\rScanning electron microscope (SEM), energy dispersive (EDS), X-ray\rphotoelectron spectroscopy (XPS) and X-ray diffraction (XRD) are employed to\rcharacterize the modified films. Diffuse reflectance spectra (DRS) test,\rphoto-generated current test and photo decomposition test are applied to evaluate the\rphoto-catalytic property of the modified films. The results show that Eu2O3 transformed into one-dimensional (1-D) nano-wires embedded within the composite\rfilm, and the film has high photo-catalytic property.