Abstract The photocatalytic reduction of toxic Cr(VI), to green Cr(III) by visible light, is highly required. Metal-organic frameworks have been waged more and more devotion in the field of environmental remediation. Diversification along with functionalization is still thought-provoking and crucial for the progress of metal-organic framework (MOF)-based high activity materials. Herein, a succession of UiO-66-NH2@ZnIn2S4 composites with varying amount of UiO-66-NH2 is prepared by the facile solvothermal technique. Synergetic effect for Cr(VI) reduction is assessed under the influence of visible light (λ > 420 nm). UiO-66-NH2 octahedron is detained by ZnIn2S4 nanoflakes. The obvious enhancement in activity is observed which is credited to the well-suited energy band construction and close interaction between the interface of ZnIn2S4 and UiO-66-NH2, which leads to effective transfer and separation of photogenerated carriers. Synergistic effect could be evidently understood from the PL and UV -spectroscopy, after molding into heterostructure of UiO-66-NH2@ZnIn2S4. In addition, UiO-66-NH2@ZnIn2S4 composites exhibited good stability in photocatalytic reduction. Consequently, this UiO-66-NH2 constructed composite has high potential in the field of environmental remediation.

中文翻译：

---

ZnIn2S4 纳米片与金属-有机骨架成型异质结构的协同效应，用于高效可见光驱动的 Cr(VI) 光催化还原

摘要 非常需要通过可见光将有毒的 Cr(VI) 光催化还原为绿色 Cr(III)。金属有机骨架在环境修复领域越来越受到重视。多样化和功能化仍然是发人深省的，对于基于金属有机框架（MOF）的高活性材料的进展至关重要。在此，通过简便的溶剂热技术制备了一系列具有不同量 UiO-66-NH2 的 UiO-66-NH2@ZnIn2S4 复合材料。在可见光 (λ > 420 nm) 的影响下评估了 Cr(VI) 还原的协同效应。UiO-66-NH2 八面体被 ZnIn2S4 纳米薄片滞留。观察到活性的明显增强，这归因于 ZnIn2S4 和 UiO-66-NH2 界面之间合适的能带结构和密切相互作用，从而导致光生载流子的有效转移和分离。在成型为 UiO-66-NH2@ZnIn2S4 异质结构后，从 PL 和紫外光谱可以明显地理解协同效应。此外，UiO-66-NH2@ZnIn2S4复合材料在光催化还原中表现出良好的稳定性。因此，这种 UiO-66-NH2 构建的复合材料在环境修复领域具有很高的潜力。UiO-66-NH2@ZnIn2S4复合材料在光催化还原中表现出良好的稳定性。因此，这种 UiO-66-NH2 构建的复合材料在环境修复领域具有很高的潜力。UiO-66-NH2@ZnIn2S4复合材料在光催化还原中表现出良好的稳定性。因此，这种 UiO-66-NH2 构建的复合材料在环境修复领域具有很高的潜力。