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

Abstract

V 2 O 5 -TiO 2 porous layers were synthesized via micro-arc oxidation for the first time. The effect of the applied voltage on morphology, composition, and photoactivity 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.

Characterization of Al2O3–TiO2 nano porous solar absorbers derived via MAO/sol-gel hybrid process

“…In our previous works, we synthesized V 2 O 5 -TiO 2 and WO 3 -TiO 2 combined layers suitable for photocatalytic applications employing MAO technique [25][26][27][28][29]. In the present study, Al 2 O 3 -TiO 2 composite layers were grown as a solar selective absorber via a hybrid method including MAO and sol-gel processes for the first time.…”

One-step preparation and photocatalytic performance of vanadium doped TiO2 coatings

“…VO À 3 and OH À anions move toward the titanium anode due to strong electric field and react with Ti 4þ cations in the vicinity of the anode [31]:…”

Characterization and photocatalytic activity of Ti/TinOm ∙ ZrxOy coatings for azo-dye degradation

“…The effective way to increase the spectral sensitivity of the material is doping the semiconductor nanostructures with transition metal oxides in the quantity of 1-10% wt. [8][9][10][11][12][13].…”