NH2-MIL-101(Fe)@ZnIn2S4/ZnS heterojunction nanoreactors for efficient photocatalytic-Fenton performance via in-situ H2O2 evolution

NH2-MIL-101(Fe)@ZnIn2S4/ZnS core-shell nanoreactors with S vacancy defects as photocatalytic-Fenton system are fabricated via hydrothermal approach. The introduction of S vacancy in ZnIn2S4 can generate defect levels and thus improve the visible light absorption. The compact core-shell structure formed between ZnIn2S4 and NH2-MIL-101(Fe) provides adequate surface active sites. The short charge transfer path of the formed dual Z-scheme heterojunction nanoreactor greatly accelerates the charge transfer and separation efficiency. It is worth noting that the nanoreactors can produce a large amount of H2O2 and construct an excellent photocatalytic-Fenton system. Under visible light irradiation, NH2-MIL-101(Fe) @ZnIn2S4/ZnS has a high photocatalytic hydrogen production efficiency of 25.371 mmol/g/h and the high degradation efficiency of 99.8% within 150 min for tetracycline. The resultant NH2-MIL-101(Fe)@ZnIn2S4/ ZnS photocatalysts will have potential applications in fields of energy and environment.(c) 2023 Elsevier Ltd. All rights reserved.

Automated summary

NH2-MIL-101(Fe)@ZnIn2S4/ZnS core-shell nanoreactors with S vacancy defects were prepared via hydrothermal approach. The introduction of S vacancy in ZnIn2S4 enhanced visible light absorption and the compact core-shell structure accelerated charge transfer and separation efficiency. The nanoreactors produced abundant H2O2 and demonstrated high photocatalytic-Fenton activity for tetracycline degradation. These photocatalysts have promising applications in energy and environmental fields.