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

•• Z-scheme CDs/Bi4O5Br2/ATP composite photocatalyst was successfully synthesized by dynamic adsorption method.•• The degradation efficiency of 3 wt% CDs/Bi4O5Br2/ATP for ciprofloxacin could reach up to 90% within 120 min under simulated sunlight.•• 3 wt% CDs/Bi4O5Br2/ATP composite photocatalyst had good stability for ciprofloxacin degradation.•• ·O2–, h+, and ·OH played a coordinating role in the degradation of ciprofloxacin under simulated sunlight.