Enhanced visible-light photocatalytic activity of S-scheme Bi3NbO7/Bi2MoO6 heterojunction composite photocatalyst

S-scheme Bi3NbO7/Bi2MoO6 (BNO/BMO) heterojunction composite photocatalysts were successfully synthesized by hydrothermal method, the photocatalytic degradation of TC by the prepared catalysts was evaluated under visible light. The supreme photocatalytic activity of the prepared samples was achieved when BMO loading is 20%, and its degradation rate is 1.8 times higher than pure BNO. BNO and BMO closely contacted each other to achieve efficient separation of photogenerated carriers under the internal electric field. The main active species and carrier lifetimes were investigated by capture experiments and time-resolved transient decay spectra, combined with other characterization techniques, suggesting possible S-scheme photocatalytic mechanism, which also provides a new way for the treatment of antibiotics in environmental remediation.