An efficient photo Fenton system for in-situ evolution of HOvia defective iron-based metal organic framework@ZnInS core-shell Z-scheme heterojunction nanoreactor.

The fabrication of an efficient photoFenton system without the addition of HO is still a challenge and is cost-effective and favorable for practical applications. In this work, a core@shell Z-scheme heterojunction nanoreactor was successfully fabricated, in which hierarchical two-dimensional (2D) ZnInS nanosheets are coated on defective iron-based metal-organic frameworks (MOFs) (NH-MIL-88B(Fe)), realizing efficient in-situ evolution of HO and constructing an optimal heterogeneous Fenton platform. The degradation rates of defective NH-MIL-88B(Fe)@ZnInS (0.4 g L) for bisphenol A and ofloxacin under visible light irradiation within 180 min reached 99.4% and 98.5%, respectively, and the photocatalytic hydrogen production efficiency was approximately 502 μmol h g. The excellent photoFenton performance was attributed to the introduction of ligand defects into the MOF, which can adjust the band structure to enhance the light absorption capacity, and the in-situ generation of HO accelerating the Fe/Fe conversion. In addition, the formation of the core@shell nanoreactor Z-scheme heterojunction structure promoted spatial charge separation. This strategy offers new ideas for constructing efficient photocatalysis and photoFenton systems.