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Erschienen in:
26.12.2015
The effect of anodizing voltage on morphology and photocatalytic activity of tantalum oxide nanostructure
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 4/2016
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Abstract
In this study, tantalum oxide nanostructure
films with different morphology were prepared by one-step anodizing of tantalum foil in aqueous electrolytes consisting of sulfuric acid and hydrofluoric acid. The effects of anodizing voltage on the morphology and photocatalytic activity of prepared tantalum oxide films were investigated. The morphology and structure were characterized by FE-SEM, XRD and EDX. SEM results show that films morphology can be varied by controlling anodizing voltage and under optimized electrochemical conditions, Ta2O5 nanotube layers can be grown up to thickness of 2 μm. Photocatalytic activity of the Ta2O5 films was evaluated in terms of the degradation of methylene blue under UV light. The results showed that Ta2O5 nanotube film exhibited higher photocatalytic activity than the Ta2O5 nanoporous films. The reason of this enhanced photocatalytic property can be attributed to high specific surface areas and the nanotube structures of this sample.