N, S-Codoped TiO2/Fe2O3 Heterostructure Assemblies for Electrochemical Degradation of Crystal Violet Dye

In contemporary research, "Heterostructure" assemblies play an important role in energy conversion systems, wherein the composite assemblies facilitate faster charge carrier transport across the material interfaces. The improved/enhanced efficiency metrics in these systems (electro/photo-electrochemical processes/devices) is due to synergistic interaction and synchronized charge transport across material interfaces. Herein, we report Type-I Heterostructure consists of N, S doped TiO2 and Fe2O3 for electrochemical crystal violet dye degradation studies. Synthesized N-S codoped TiO2/Fe2O3 composite heterostructured assemblies were fabricated on Titanium (Ti) substrate and used for electrochemical analysis. Complete decolorization was achieved with all the fabricated electrodes and a higher rate of degradation was achieved with the composite electrode (Ti/TiO2/Fe2O3) in comparison to individual electrodes (bare Ti, Ti/TiO2, Ti/Fe2O3). Further, a probabilistic mechanism of degradation is proposed in support of the hypothesis. The outcomes of present work will have a profound effect on doped semiconductor heterostructure assemblies in the degradation of complex dye molecules of industrial outlets.