Enhancement of the visible light photocatalytic activity of Cu₂O/BiVO₄ catalysts synthesized by ultrasonic dispersion method at room temperature

详细信息    查看全文

• 作者：Huiquan Li ; Wenshan Hong ; Yumin Cui ; Xiangyang Hu ; Suhua Fan ; Liangjun Zhu
• 关键词：Ultrasonic dispersion method ; Loaded ; Cuprous oxide ; Bismuth vanadate ; Photocatalysis
• 刊名：Materials Science and Engineering: B
• 出版年：February, 2014
• 年：2014
• 卷：181
• 期：Complete
• 页码：1-8
• 全文大小：2826 K

文摘

Cu₂O loaded nano-BiVO₄ (Cu₂O/BiVO₄) photocatalysts with various weight percents of Cu₂O were successfully prepared by a facile and effective ultrasonic dispersion method at room temperature. Methylene blue (MB), methyl orange (MO) and phenol in an aqueous solution served as a probe reaction to evaluate the photocatalytic activities of the as-prepared Cu₂O/BiVO₄ catalysts under the irradiation of visible light. The photocatalytic activity of the Cu₂O/BiVO₄ catalysts was greatly enhanced, compared with that over commercial Degussa P-25 (TiO₂), pure Cu₂O and BiVO₄. The remarkably enhanced photocatalytic activities could be mainly attributed to the effective transfer of the photogenerated electrons and holes at the interface of BiVO₄ and Cu₂O, which reduced the recombination of electron-hole pairs. A transfer process of photogenerated carriers was proposed based on the band structures of BiVO₄ and Cu₂O. The photocatalytic mechanism of Cu₂O/BiVO₄ catalysts was discussed.