Portal de Periódicos da CAPES

An efficient photo Fenton system for in-situ evolution of H2O2 via defective iron-based metal organic framework@ZnIn2S4 core-shell Z-scheme heterojunction nanoreactor

2022; Elsevier BV; Volume: 437; Linguagem: Inglês

10.1016/j.jhazmat.2022.129436

1873-3336

Meijie Liu, Zipeng Xing, Huanan Zhao, Sijia Song, Yichao Wang, Zhenzi Li, Wei Zhou,

Covalent Organic Framework Applications

The fabrication of an efficient photoFenton system without the addition of H2O2 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) ZnIn2S4 nanosheets are coated on defective iron-based metal-organic frameworks (MOFs) (NH2-MIL-88B(Fe)), realizing efficient in-situ evolution of H2O2 and constructing an optimal heterogeneous Fenton platform. The degradation rates of defective NH2-MIL-88B(Fe)@ZnIn2S4 (0.4 g L-1) 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-1 g-1. 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 H2O2 accelerating the Fe3+/Fe2+ 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.