Abstract
A simple hydrothermal synthesis strategy is proposed for optimization of the BiFeO3 size and structure to enhance its photocatalytic activity for removal of organic dyes. The results of the comparison tests show that the photodegradation rate of such nano-sized BiFeO3 can possess at least 5.5 times higher than that of the most used micro-sized form, up to 6.161 h−1 for photodegradation of MO anionic dye. Initial analysis indicates that large specific surface area, higher photocurrent response and fast photogenerated charge transfer should be responsible for the excellent photocatalytic activity of nano-sized BiFeO3. Such size-controlled synthesis strategy would provide a promising way to design and regulate the kind of iron oxide semiconductors photocatalysts for high-efficient photocatalytic applications.
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