Heterogeneous junction Ni-MOF@BiOBr composites: Photocatalytic degradation of methylene blue and ciprofloxacin

[email protected] composites were prepared by solvothermal method, and the effects of different contents of BiOBr on the photocatalytic performance of the composites were investigated. Through the photocatalytic degradation of methylene blue (MB) and ciprofloxacin (CIP), it could be concluded that the best results were obtained when the Ni-MOF/Bi(NO3)3·5H2O quality ratio of 1:1. After 120 min irradiation with xenon lamp light source, the degradation rate of MB solution and CIP solution could reach 82.8% and 92.8%. The photocatalytic mechanism analysis speculates that [email protected] was an n-n type heterostructure composite material. This heterogeneous junction could physically isolate electrons and holes and effectively inhibit the recombination of the two. Therefore, it can effectively highlight the catalytic performance. In addition, the free radical trapping experiments proved that the free radicals that play a major role in the photocatalytic degradation of CIP solution are h+ and hydroxyl radicals (·OH).