Pt nanoparticles decorated rose-like Bi 2 O 2 CO 3 configurations for efficient photocatalytic removal of water organic pollutants.

Pt nanoparticles decorated with rose-like Bi 2 O 2 CO 3 configurations were synthesized via a simple photoreduction method at room temperature. The structure, morphology, optical and electronic properties, and photocatalytic performance of the as-prepared materials were characterized. Compared to pure Bi 2 O 2 CO 3 , the Pt/Bi 2 O 2 CO 3 photocatalysts show better performance in decomposing RhB, BPA and OTC under visible light ( λ > 420 nm). The enhanced photocatalytic activity of Pt/Bi 2 O 2 CO 3 could be attributed to the modification in light absorption ( λ > 420 nm) charge migration and the separation of photo-generated electrons (e - ) and holes (h + ). Free radical trapping experiments demonstrated that the main active species of the catalytic reaction are different in decomposing RhB and BPA.