Synthesis of <scp> Ag ₃ PO ₄ </scp> / <scp>BiOBr</scp> composites for treating photocatalytic degradation of <scp>MO</scp> and <scp>MG</scp>

Abstract In this paper, the heterostructure of Ag 3 PO 4 /BiOBr was synthesized by chemical deposition. The degradation rates of MO and MG in Ag 3 PO 4 /BiOBr‐2 (B2AP) reached 93.33% and 89.16% within 35 and 6 min, and the degradation kinetic rate constants were 3.47 and 1.17 times higher than those of pure Ag 3 PO 4 , and B2AP still maintained good catalytic activity after 4 cycles. BiOBr nanosheets are attached to the surface of Ag 3 PO 4 nanoparticles, which increases the reactive site and improves the light utilization efficiency. Through free radical trapping experiments, it was determined that the main active substances for the degradation of MO were ·O 2 − and h + . After a series of characterization and photoelectrochemical experiments, a new possible photocatalytic mechanism of Z‐type heterojunction Ag 3 PO 4 /BiOBr photocatalyst was proposed.