Fabrication of MoS2QDs/Ag3PO4 photocatalyst for efficient visible light catalysis

Silver phosphate (Ag 3 PO 4 ) has excellent photocatalytic performance under visible light irradiation, but it has the disadvantages of poor stability and high cost. MoS 2 QDs/Ag 3 PO 4 composites were successfully prepared by a simple precipitation method. The photocatalytic performance of rhodamine B was studied by simulating its degradation under visible light. MoS 2 QDs/Ag 3 PO 4 -1 composites have shown good photocatalytic activity. Within 4 min, the degradation rate of RhB reached 99.6%, which was due to the accelerated spatial separation of charge carriers by MoS 2 QDs. The cyclic test results have shown that the composite material has good cyclic stability. After five cycle tests, the activity of the composite remained above 85%. Finally, the experimental data of free radical capture has provided a possible model to explain the degradation mechanism of RhB.