Preparation and characterization of direct Z-scheme photocatalyst Bi2O3/NaNbO3 and its reaction mechanism

- A highly active Bi2O3/NaNbO3 photocatalyst was prepared by a facile ball milling.
- The results revealed that Bi2O3/NaNbO3 is characteristic of Z-scheme photocatalyst.
- The rate constant of RhB for Bi2O3/NaNbO3 is 6.3 times that of pure NaNbO3.
- The e− in the CB of Bi2O3 and h+ in the VB of NaNbO3 are quickly combined.
- The e− in the CB of NaNbO3 and h+ in the VB of Bi2O3 produce
- O2− and
- OH, respectively.