Titanium dioxide modified with transition metals and rare earth elements: Phase composition, optical properties, and photocatalytic activity

The photocatalytic activity of the powders was assessed in liquid-solid and gas-solid phases, under UVA and visible-light irradiation, monitoring the degradation of an organic dye and isopropanol, respectively. The results were explained by taking into account the relative amounts of anatase and rutile in the samples, the specific surface area of the powders, and their optical properties.