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Photocatalytic activity of the anodic oxides on TiNbSn based on the decomposition of MB with the variation in the UV illumination time. The photocatalytic activity was evaluated by measuring the absorbance of MB at 664 nm. The apparent reaction rate constant kapp is calculated as 0.00352 min−1. (AN: annealed, MB: methylene blue, UV: ultraviolet).
