Highly active and durable Bi2O3/TiO2 visible photocatalyst in flower-like spheres with surface-enriched Bi2O3 quantum dots

▶ A novel flower-like Bi2O3/TiO2 was prepared by a facile solvothermal alcoholysis. ▶ The flower-like structure enhanced light absorption via multiple light reflections. ▶ Surface-enriched Bi2O3 quantum dots promoted photosensitizing effect. ▶ The Bi2O3/TiO2 displayed strong interaction between Bi2O3 and TiO2. ▶ The Bi2O3/TiO2 exhibited high activity and strong durability in photocatalysis.