Abstract In this work, we reported a novel three-dimensional (3D) visible-light-driven hybrid photocatalyst synthesized via a facile hydrothermal process, which consists of two different 2D materials: g-C3N4 and BiOBr0.2I0.8. The physicochemical properties of the as-synthesized 3D hybrid photocatalyst were fully characterized using Electron spin resonance, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy and UV–Vis diffuse reflectance spectrometry. The 10CN/BiOBr0.2I0.8 composite exhibits the best performance in visible-light-driven photocatalytic degradation of RhB among prepared samples. In such hybrid systems, electrons generated in g-C3N4 transfer to BiOBr0.2I0.8, while photo-generated holes on BiOBr0.2I0.8 transfer to g-C3N4, which enhances the charge separation through the heterojunction interface. The hole left on the valence band of g-C3N4 is the most efficient active species in the degradation process of RhB, therefore, heterojuncted BiOBr0.2I0.8 need better control for keeping some active sites on g-C3N4. In addition, the photodegradation efficiency of RhB still remains over 98% after six consecutive cycles, which indicates the good stability of such 3D g-C3N4/BiOBr0.2I0.8 hybrid photocatalysts.

中文翻译：

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轻松构建新型 3D 多孔 gC 3 N 4 /BiOBr 0.2 I 0.8 杂化物：用于可见光光催化的高效电荷分离

摘要 在这项工作中，我们报道了一种通过简单的水热法合成的新型三维 (3D) 可见光驱动杂化光催化剂，它由两种不同的二维材料组成：g-C3N4 和 BiOBr0.2I0.8。使用电子自旋共振、X 射线衍射、扫描电子显微镜、透射电子显微镜、X 射线光电子能谱、傅里叶变换红外光谱和紫外-可见漫反射光谱法充分表征了合成的 3D 杂化光催化剂的物理化学性质. 在制备的样品中，10CN/BiOBr0.2I0.8 复合材料在可见光驱动的 RhB 光催化降解中表现出最佳性能。在这种混合系统中，g-C3N4 中产生的电子转移到 BiOBr0.2I0.8，而 BiOBr0.2I0.8 上的光生空穴转移到 g-C3N4，这增强了通过异质结界面的电荷分离。留在g-C3N4价带上的空穴是RhB降解过程中最有效的活性物质，因此，异质结BiOBr0.2I0.8需要更好地控制以保留g-C3N4上的一些活性位点。此外，连续六个循环后RhB的光降解效率仍保持在98%以上，这表明这种3D g-C3N4/BiOBr0.2I0.8杂化光催化剂具有良好的稳定性。