In this study, BiVO/BiVO heterojunctions were constructed by NaOH etching of BiVO. The resulting samples exhibit significantly enhanced photocatalytic activity in removal of rhodamine B (RhB) under visible light irradiation. Notably, the photocatalytic efficiency of BiVO etched by NaOH with a concentration of 3 mol/L is 3.17 times of that of the reference BiVO. Furthermore, the photocatalysts demonstrate remarkable stability during five successive cycle experiments. The heightened photocatalytic activity of BiVO treated by sodium hydroxide can be definitely attributed to improved separation efficiency of photogenerated charges owing to construction of BiVO/BiVO heterojunctions.

中文翻译：

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原位构建具有增强光催化活性的 Bi25VO40/BiVO4 异质结

在本研究中，BiVO/BiVO 异质结是通过 BiVO 的 NaOH 蚀刻构建的。所得样品在可见光照射下去除罗丹明 B (RhB) 的光催化活性显着增强。值得注意的是，浓度为3 mol/L的NaOH蚀刻的BiVO的光催化效率是参考BiVO的3.17倍。此外，光催化剂在五个连续的循环实验中表现出显着的稳定性。经过氢氧化钠处理的 BiVO 光催化活性的提高可以肯定地归因于 BiVO/BiVO 异质结的构建提高了光生电荷的分离效率。