Abstract Bi2WO6 has a great application prospect in the field of organic pollutants photodegradation. However, the development of Bi2WO6 photocatalyst has been limited by low specific surface area, weak hydrophilicity and high electron-hole recombination rate. Whereas studies applying MOFs as cocatalyst to overcome the above disadvantages are very limited. In this study, the Z-scheme photocatalysts of UiO-66-NH2/Bi2WO6 composites with UiO-66-NH2 growth on the surface of Bi2WO6 was prepared by in situ growth. Compared with pure UiO-66-NH2 and Bi2WO6, The composite of UiO-66-NH2/Bi2WO6 displayed higher photocatalytic activity for Rhodamine B (RhB) and phenol degradation under visible light. Comparatively, 0.125-UiO-66-NH2/Bi2WO6 behaved the best photocatalytic property. SEM, TEM and Water contact angles results revealed that integrating UiO-66-NH2 with Bi2WO6 could enhance the dispersion of UiO-66-NH2 and hydrophilic property of Bi2WO6. The photo-electrochemical studies indicated that the separation and transfer of photo-generated charge carriers can be efficiently improved via the interface of UiO-66-NH2 and Bi2WO6. Based on the experiments of free radical scavengers, a possible mechanism of degradation was suggested, which proved that ∙O2− and h+ are the main active substances. This Z-scheme photocatalysts will have application prospects in the environment remediation, and this strategy provides a new insight into construction of composites with strong interaction photocatalysts.

中文翻译：

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在 Bi2WO6 上原位生长 UiO-66-NH2 以制造具有增强的可见光驱动光催化降解性能的 Z 型异质结

摘要 Bi2WO6在有机污染物光降解领域具有广阔的应用前景。然而，Bi2WO6光催化剂的发展受到比表面积低、亲水性弱和电子空穴复合率高的限制。而应用 MOF 作为助催化剂来克服上述缺点的研究非常有限。在本研究中，通过原位生长制备了 UiO-66-NH2/Bi2WO6 复合材料的 Z 型光催化剂，UiO-66-NH2 在 Bi2WO6 表面生长。与纯UiO-66-NH2和Bi2WO6相比，UiO-66-NH2/Bi2WO6复合材料在可见光下对罗丹明B（RhB）和苯酚的降解表现出更高的光催化活性。相比之下，0.125-UiO-66-NH2/Bi2WO6表现出最好的光催化性能。扫描电镜，TEM 和水接触角结果表明，将 UiO-66-NH2 与 Bi2WO6 结合可以增强 UiO-66-NH2 的分散性和 Bi2WO6 的亲水性。光电化学研究表明，通过 UiO-66-NH2 和 Bi2WO6 的界面可以有效地改善光生载流子的分离和转移。基于自由基清除剂的实验，提出了一种可能的降解机制，证明了∙O2-和h+是主要的活性物质。这种Z型光催化剂将在环境修复中具有应用前景，该策略为构建具有强相互作用光催化剂的复合材料提供了新的思路。光电化学研究表明，通过 UiO-66-NH2 和 Bi2WO6 的界面可以有效地改善光生载流子的分离和转移。基于自由基清除剂的实验，提出了一种可能的降解机制，证明了∙O2-和h+是主要的活性物质。这种Z型光催化剂将在环境修复中具有应用前景，该策略为构建具有强相互作用光催化剂的复合材料提供了新的思路。光电化学研究表明，通过 UiO-66-NH2 和 Bi2WO6 的界面可以有效地改善光生载流子的分离和转移。基于自由基清除剂的实验，提出了一种可能的降解机制，证明了∙O2-和h+是主要的活性物质。这种Z型光催化剂将在环境修复中具有应用前景，该策略为构建具有强相互作用光催化剂的复合材料提供了新的思路。