Bi2S3/NH2-MIL-53(Fe) composite photocatalysts for enhanced catalytic degradation of contaminants driven by UV light

The Z-scheme heterojunction photocatalyst Bi2S3/NH2-MIL-53 (Fe) was successfully constructed by in situ growth. The larger specific surface area and porosity of the composite provided more active sites for the photocatalytic reaction, which remarkably improved the photo-Fenton performance. The charge transfer mechanism effectively inhibits the recombination of electrons and holes, thereby significantly reducing the occurrence of photocorrosion. The degradation rates for CIP, TC-H, and SMX were 91 %, 87 %, and 86 % respectively. Additionally, the degradation rates for dyes all exceeded 98 % within 60 min, demonstrating their universal effectiveness in degrading pollutants. In addition, the materials showed good resistance to interference by natural organic matter. The good degradation rate remained after several cycles, indicating the high stability of the composite material. In conclusion, this study proposed a new method to design and fabricate composite photocatalysts using metal-organic skeletons, which provides a new way and feasible solution for the development of highly efficient photocatalytic materials and their application in the field of environmental purification.

Automated summary

In this study, a highly efficient photocatalyst Bi2S3/NH2-MIL-53 (Fe) with a Z-scheme heterojunction structure was successfully constructed. The composite material, with larger specific surface area and porosity, provided more active sites for the photocatalytic reaction and significantly improved the photo-Fenton performance. The charge transfer mechanism effectively inhibited the recombination of electrons and holes, contributing to the reduction of photocorrosion. The composite material demonstrated universal effectiveness in degrading pollutants and exhibited good stability even after several cycles. This study provides a new approach and feasible solution for the development and application of highly efficient photocatalytic materials in environmental purification.