Photo-Degradation of Methelyne Blue over V2O5–TiO2 Nano-Porous Layers Synthesized by Micro Arc Oxidation
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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.
KeywordsMicro arc oxidation Titanium oxide Vanadium oxide Catalysis
The authors would like to express their sincere thanks to all personnel in ceramic synthesis laboratory. The assistance of Mr. Rafi’ee for the XPS measurements is also appreciated.