Fe2O3/BiVO4 heterogeneous photo-Fenton catalyst with excellent dye degradation performance prepared by ultrasonic-assisted calcination

A series of Fe 2 O 3 /BiVO 4 composite photo-Fenton catalysts were prepared by a simple ultrasonic-assisted calcination method. By changing the calcination temperature, FB-2 with tetragonal structure BiVO 4 has excellent photo-Fenton performance. The crystal structure and chemical composition of the composite catalyst were studied by a series of characterizations. Under 5 W LED illumination, 97% rhodamine B dye (Rh B) was degraded within 40 min in FB-2 sample, which was attributed to the high efficiency of photogenic electron–hole pair separation. The subsequent capture experiment and Tafel test proved that h + , e − , ·OH were the main active substances in the degradation process and the flow direction of electrons in the reaction process. The composite catalyst has good cyclic stability and efficient photo-Fenton catalytic degradation performance, and has good reference value for the degradation of water dyes.