Abstract Unveiling the pore-size performance of metal organic frameworks (MOFs) is imperative for controllable design of sophisticated catalysts. Herein, UiO-66 with distinct macropores and mesopores were intentionally created and served as substrates to create advanced CdS/UiO-66 catalysts. The pore size impacted the spatial distribution of CdS nanoparticles (NPs): CdS tended to deposit on the external surface of mesoporous UiO-66, but spontaneously penetrated into the large cavity of macroporous UiO-66 nanocage. Normalized to unit amount of CdS, the photocatalytic reaction constant of macroporous CdS/UiO-66 over 4-nitroaniline reduction was ∼3 folds of that of mesoporous counterpart, and outperformed many other reported state-of-art CdS-based catalysts. A confinement effect of CdS NPs within UiO-66 cage could respond for its high activity, which could shorten the electron-transport distance of NPs-MOFs-reactant, and protect the active CdS NPs from photocorrosion. The finding here provides a straightforward paradigm and mechanism to rationally fabricate advance NPs/MOFs for diverse applications.

中文翻译：

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用于有效还原 4-硝基苯胺的分层多孔 S 型 CdS/UiO-66 光催化剂

摘要 揭示金属有机骨架 (MOF) 的孔径性能对于复杂催化剂的可控设计至关重要。在此，特意创造了具有不同大孔和中孔的 UiO-66，并将其用作制备先进 CdS/UiO-66 催化剂的底物。孔径影响 CdS 纳米粒子 (NPs) 的空间分布：CdS 倾向于沉积在介孔 UiO-66 的外表面上，但会自发地渗透到大孔 UiO-66 纳米笼的大腔中。归一化为单位量的 CdS，大孔 CdS/UiO-66 对 4-硝基苯胺还原的光催化反应常数是介孔对应物的约 3 倍，并且优于许多其他报道的最先进的 CdS 基催化剂。CdS NPs 在 UiO-66 笼中的限制效应可以响应其高活性，这可以缩短NPs-MOFs-反应物的电子传输距离，并保护活性CdS NPs免受光腐蚀。这里的发现提供了一个简单的范例和机制，可以为各种应用合理地制造先进的 NPs/MOFs。