Preparation and characterization of Ppy/Bi2MoO6 microspheres with highly photocatalytic performance for removal of highly concentrated organic dyes

In this paper, adjusting the content of conducting polymer polypyrrole (Ppy), a series of Ppy/Bi 2 MoO 6 microsphere photocatalysts were prepared. The prepared samples were characterized by some advanced physicochemical methods. These results showed that the introduction of Ppy was beneficial to the increase of crystallinity and specific surface area of Bi 2 MoO 6 . In electrochemical tests, the Ppy/Bi 2 MoO 6 microspheres photocatalyst showed the enhanced migration rate of photogenerated carriers  and the improved utilization efficiency of photogenerated carriers in comparison with the pure Bi 2 MoO 6 . The Ppy/Bi 2 MoO 6 microspheres photocatalyst exhibited an excellent photocatalytic performance in the degradation of high concentration of Rhodamine B (RhB), and also could efficiently remove the mixed dyes (RhB and methyl orange). Furthermore, the capture experiments reveal that both holes (h + ) and superoxide radicals (·O 2 − ) played an important role in the removal of dyes.