Controllable synthesis of Bi4O5Br2 ultrathin nanosheets for photocatalytic removal of ciprofloxacin and mechanism insight

A novel Bi₄O₅Br₂ ultrathin nanosheets material with 8 nm thickness was prepared via a reactable ionic liquids-assisted solvothermal method accompanied with facile pH control for the first time. The variable energy band structure of Bi₄O₅Br₂ was responsible for the enhanced photocatalytic activity.