Ordered macroporous Bi2O3/TiO2 film coated on a rotating disk with enhanced photocatalytic activity under visible irradiation

- 3DOM Bi2O3/TiO2 film was prepared by sol-gel method with PS microspheres.
- Bi2O3-TiO2 heterojunctions realized the low photoelectron-hole recombination.
- 3DOM structure promoted light-harvesting and facilitated reactant adsorption.
- Rotating disk reduced light shielding on Bi2O3-TiO2 film in color solution.
- Visible-light single- and mixed-dyes degradation or Cr6+ reduction was enhanced.