An efficient catalytic system and surface modification are considered as two important routes for the enhancement of MOF-based photocatalytic properties. Herein, we report a significant improvement in hydrogen production efficiency with MOFs achieved through both the abovementioned routes. With the newly developed highly efficient TEOA–ErB system, H₂ generation rate on UiO-66-NH₂ octahedrons could amount to 21.2 mmol h⁻¹ g⁻¹. Then, based on this system, the interaction of the UiO-66-NH₂ surface with graphene was judiciously controlled. The prepared graphene well-wrapped UiO-66-NH₂ octahedrons, in which every face was in contact with graphene, led to the highest H₂ production efficiency of 41.4 mmol h⁻¹ g⁻¹. These findings suggest that MOFs could potentially evolve into highly efficient photocatalysts when incorporated into a proper system and further revealed that modifications on the surface of MOFs might result in a better inhibition of electron–hole recombination in H₂ generation.

中文翻译：

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石墨烯包裹的UiO-66-NH ₂八面体在可见光下超高效制氢

有效的催化体系和表面改性被认为是增强基于MOF的光催化性能的两条重要途径。本文中，我们报告了通过上述两种途径实现的MOF，氢生产效率均得到了显着提高。使用新开发的高效TEOA-ErB系统，UiO-66-NH ₂八面体的H ₂生成速率可达到21.2 mmol h ^-1 g ^-1。然后，基于该系统，明智地控制了UiO-66-NH ₂表面与石墨烯的相互作用。制备的石墨烯包裹良好的UiO-66-NH ₂八面体，其中每个面都与石墨烯接触，导致产生最高的H _2。生产效率为41.4 mmol h ^-1 g ^-1。这些发现表明，将MOF掺入适当的系统中后，有可能演变成高效的光催化剂，并进一步表明，MOF表面的修饰可能会更好地抑制H ₂生成中的电子-空穴复合。