Novel BiOF/TiO2 heterostructures with controlled amounts of BiOF and TiO2 have been successfully synthesized via a simple solid‐state sintering method. The structural, morphological and optical properties were analyzed using several characterization techniques. A shift of the TiO2 absorption edge toward the visible region was observed. The optimal molar ratio of BiOF/TiO2 was found to be (1:3) with a photodegradation percentage of 91.2 % and it was 7 and 5 times more efficient than that of pure BiOF or TiO2 nanopowder, respectively. BiOF/TiO2 (1:3) heterojunction has showed high photodegradation stability for the Rh B photodegradation after three cycles. In the proposed photocatalytic mechanism, TiO2 absorbed the visible light and carried out the photocatalytic reaction owing to the decrease of its band gap value due to the formation of oxygen vacancies, while BiOF played an important role in the charge separation process due to the intimate contact of the BiOF/TiO2 heterojunction.

中文翻译：

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BiOF/TiO2异质结构的合成及其增强的可见光光催化活性

通过简单的固态烧结方法成功合成了具有可控量的 BiOF 和 TiO2 的新型 BiOF/TiO2 异质结构。使用几种表征技术分析了结构、形态和光学特性。观察到 TiO2 吸收边缘向可见光区移动。发现 BiOF/TiO2 的最佳摩尔比为 (1:3)，光降解率为 91.2%，其效率分别是纯 BiOF 或 TiO2 纳米粉末的 7 倍和 5 倍。BiOF/TiO2 (1:3) 异质结在三个循环后对 Rh B 光降解表现出很高的光降解稳定性。在提出的光催化机制中，