Visible-light-driven Ag-decorated g-C3N4/Bi2WO6 Z-scheme composite for high photocatalytic activity

Abstract A novel Z-scheme Ag-decorated g-C 3 N 4 /B 2 WO 6 composite is successfully synthesized by introducing Ag NPs on the interface of g-C 3 N 4 /Bi 2 WO 6 composite. The Ag-decorated g-C 3 N 4 /Bi 2 WO 6 sample exhibits much higher photocatalytic activity than g-C 3 N 4 /Bi 2 WO 6 composite on the degradation of Rhodamine B under visible light. The significantly enhanced catalytic efficiency could be attributed to the Z-scheme transfer mechanism of photogenerated electron-hole pairs, which was confirmed by investigating the morphology, structure, optical properties and photocatalytic activities.