Design of a direct Z-scheme photocatalyst: Preparation and characterization of Bi2O3/g-C3N4 with high visible light activity

- A direct Z-scheme photocatalyst Bi2O3/g-C3N4 was prepared.
- The photocatalyst exhibited a much higher activity than pure g-C3N4.
- Bi2O3/g-C3N4 as a typical Z-scheme photocatalyst was proved.
- e− in the CB of Bi2O3 and h+ in the VB of g-C3N4 are quickly combined.
- e− in the CB of g-C3N4 and h+ in the VB of Bi2O3 participate in redox reaction.