Metal-organic frameworks (MOFs)/semiconductor hybrids have attracted attention in photocatalysis. Herein, we report a new strategy to use thiol-laced UiO-66 (UiO-66-(SH)₂) as a porous and functional support for anchoring CdS quantum dots (QDs) (size: 0.5/3 nm). Cd²⁺ ions are firstly absorbed into the cavities of UiO-66-(SH)₂ MOFs via coordinating to the thiol groups in the presence of a base to produce UiO-66-(S-Cd)₂, then thiourea is added to form UiO-66-(S-CdS)₂ (abbreviated as UiOS-CdS). It is clearly revealed by ultrafast transient absorption spectroscopy that the thio linkage between UiO-66 and CdS acts as an effective transfer bridge of charge carriers, which greatly promotes the interface transfer process of photogenerated electrons and holes, boosting the photocatalytic hydrogen production performance from water splitting. The optimized UiOS-CdS exhibits a photocatalytic H₂ production rate of 153.2 μmol h⁻¹ (10 mg of catalyst) under visible-light irradiation (λ > 420 nm) in the absence of nobel metal co-catalyst, corrsponding to an apparent quantum efficiency of 11.9% at 420 nm. This work may provide an effective strategy to construct QDs-linker-MOFs stylephotocatalysts for efficient energy conversion.

金属有机框架（MOF）/半导体混合体在光催化中引起了关注。在这里，我们报告了一种新的策略，使用硫醇系UiO-66（UiO-66-（SH）₂）作为锚定CdS量子点（QD）（尺寸：0.5 / 3 nm）的多孔和功能性支撑。Cd ²⁺离子首先在碱的存在下通过与硫醇基团配位而被吸收到UiO-66-（SH）₂ MOF的腔中，生成UiO-66-（S-Cd）₂，然后将硫脲添加到形式UiO-66-（S-CdS）₂（缩写为UiOS-CdS）。超快速瞬态吸收光谱法清楚地表明，UiO-66和CdS之间的硫键可作为电荷载流子的有效转移桥，极大地促进了光生电子和空穴的界面转移过程，从而提高了水的光催化制氢性能分裂。优化的UiOS-CdS在不存在诺贝尔金属助催化剂的情况下，在可见光辐照（λ> 420 nm）下表现出153.2μmolh ^-1（10 mg催化剂）的光催化H ₂生成速率，与表观量子对应在420 nm处的效率为11.9％。这项工作可能为构建QDs-linker-MOFs风格的光催化剂提供有效策略，以实现高效的能量转换。