Construction of Novel Z-Scheme Cds/Bi4o5br2/Atp Heterojunction for Photocatalytic Degradation of Ciprofloxacin

Bi4O5Br2 material exhibits excellent performance in photocatalytic degradation of antibiotics, but high recombination rate of photoexcited electron-hole pairs limits its photocatalytic activity. Herein, Z-scheme CDs/Bi4O5Br2/ATP composite photocatalyst loaded with varied proportions of CDs was synthesized by dynamic adsorption method, which demonstrated excellent photocatalytic degradation performance by lowering the recombination rate of photoexcited electron-hole pairs. Ciprofloxacin degradation by 3wt% CDs/Bi4O5Br2/ATP under simulated sunlight can reach up to 90% within 120 minutes, while the 3wt% CDs/Bi4O5Br2/ATP composite photocatalyst has great stability. As a result, our research helps to prepare high-efficiency Z-scheme heterojunction and contributes to study the degradation of antibiotics in the aquatic environment.