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The Bi2O3 films-based anodes were synthesized by electrodeposition of Bi on   stainless steel substrate at constant current density and during different   deposition times, fallowed by calcination, forming Bi2O3. The thickness of   the films was determined by two methods: the observation under the   microscope and by calculation from mass difference. Electrochemical proceses   at the anodes were ivestigated by linear sweep voltammetry. At the anodes   obtained within 2, 5, 10 and 15 minutes of deposition, two dyes, namely:   Reactive Blue 19 and Crystal Violet, were decolorized by oxidation with •OH   radical, generated from H2O2 decomposition at the anodes. Decoloration times   of the anodes varied, and the shortest one was achieved with the anode   obtained during 5 minutes of deposition, with the film thickness of 2.5±0.3   μm. The optimal H2O2 concentration for the dyes degradation was found to be   10 mmol dm-3. [Projekat Ministarstva nauke Republike Srbije, br. ТR 34008

Synthesis of bismuth (III) oxide films based anodes for electrochemical degradation of reactive blue 19 and crystal violet