LAUSR

Abstract In the present research, the synthesis of the cadmium-benzene-1,4-dioxyacetic acid (Cd-1,4-BDOAH2) was carried out by the assistance of ultrasound waves, and then it was loaded with the low amount of Ag nano-particles. Subsequently, the Ag:Cd-1,4-BDOAH2 nano-photocatalyst was applied for photoelectro-Fenton/photocatalytic (PEF-PH) degradation of brilliant green (BG) in the existence of visible light in aqueous media. The synthesized composite was characterized by FTIR, SEM, EDX, TEM, XRD, DRS, and PL. The best operational conditions including time, initial BG concentration, pH, amount of photocatalyst, current and amount of FeCl3 on degradation efficiency (main and interactive) were as follows: 4 mg L−1 of BG at pH of 5, 0.4 g L−1 of Ag:Cd-1,4-BDOAH2, 250 mA of current, and 0.3 mmol L−1 of FeCl3 obtained by central composite design. The PEF-PH degradation kinetic data of BG were successfully fitted to Langmuir–Hinshelwood (L–H) model with the values of 1.16 mg L−1 min−1 and 0.018 L mg−1 for the rate constant (kr) and (KA), respectively.