Super-high activity of Bi3+ doped Ag3PO4 and enhanced photocatalytic mechanism

Bi-doped Ag3PO4 was synthesized by an ion exchange method, and its structure and properties were characterized systematically. Bi-doped Ag3PO4 managed to photodegrade high-concentration (40 mg/L) MO (1 g/L catalyst), with the degradation rate constant 7.3 times that of undoped Ag3PO4.
- OH radicals were the main active species in the oxidation of MO over Bi-doped Ag3PO4. Doping Bi3+ substantially reduced OH defects on the surface of Ag3PO4, which significantly increased the degradation efficiency of MO over Ag3PO4.