Chemically bonded Mn0.5Cd0.5S/BiOBr S-scheme photocatalyst with rich oxygen vacancies for improved photocatalytic decontamination performance

Devising exceptional S -scheme heterojunction photocatalysts utilized in annihilating pharmaceuticals and chromium contamination is significant for addressing the problem of global water pollution. In this work, a chemically bonded Mn0.5Cd0.5S/BiOBr S -scheme heterostructure with oxygen vacancies is ingeniously developed through a facile in -situ solvothermal synthesis. The designed Mn0.5Cd0.5S/BiOBr heterojunction exhibits eminently reinforced photo -activity for destruction of tetracycline hydrochloride and Cr(VI) as compared with its individual components. This substantial photo-redox performance amelioration is benefitted from the creation of an intense internal electric field (IEF) via supplying powerful driving force and migration highway by interfacial chemical bond to foster the S -scheme electron/hole disintegration. More intriguingly, the IEF at the hetero-interface drives the fast consumption of the photo -induced holes in Mn0.5Cd0.5S by the photoelectrons from BiOBr, profoundly boosting the enrichment of active photo -carriers and sparing the photo -corrosion of Mn0.5Cd0.5S. Furthermore, Mn0.5Cd0.5S/BiOBr with exceptional anti -interference property can work efficiently in real water matrices. Multiple uses of the recycled Mn0 & sdot;5Cd0 & sdot;5S/BiOBr evidence its prominent robustness and stability. This achievement indicates the vast potential of chemically bonded S -scheme photosystems with structural defects in the design of photo -responsive materials for effective wastewater treatment.