Photo-Degradation of Methelyne Blue over V2O5-TiO2 Nano-Porous Layers Synthesized by Micro Arc Oxidation

V2O5-TiO2 porous layers were synthesized via micro-arc oxidation for the first time. The effect of the applied voltage on morphology, composition, and photo-activity of the layers was investigated. The layers, which consisted of anatase, rutile, and vanadium pentoxide phases, revealed an enhanced photo-activity. About 93% of methylene blue solution was degraded on the synthesized layers after 120 min UV-irradiation with a reaction rate constant of k = 0.0228 min(-1). The band gap energies of the vanadia-titania and pure titania layers were calculated as 2.56 and 3.39 eV, respectively.