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

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Abstract

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.

Graphical Abstract

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 minutes 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.

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Acknowledgments

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.

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Correspondence to A. Z. Moshfegh.

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Bayati, M.R., Golestani-Fard, F. & Moshfegh, A.Z. Photo-Degradation of Methelyne Blue over V2O5–TiO2 Nano-Porous Layers Synthesized by Micro Arc Oxidation. Catal Lett 134, 162–168 (2010). https://doi.org/10.1007/s10562-009-0231-5

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  • DOI: https://doi.org/10.1007/s10562-009-0231-5

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