Electrochemical degradation of methyl orange from wastewater by SS/PbO2‐TiO2‐SnO2 composite electrode with and without UV

Abstract

SS/PbO2‐TiO2‐SnO2 composite electrode was synthesized by cyclic voltammetry (CV) method. The morphological structure of the composite was studied by scanning electron microscopy (SEM), X‐ray diffraction (XRD), energy dispersive X‐ray spectroscopy (EDX), element‐mapping and thermal gravimetric analysis (TGA). The photoelectrochemical and electrochemical properties were considered in 0.5 m H2SO4 solution with and without UV, respectively. The results indicated that the PbO2‐TiO2‐SnO2 composite had good photoelectrochemical properties due to anodic current and exchange current density increased (31.32% and 48.67%, respectively) under UV irradiation. The composite electrode was used as anode for methyl orange (MO) treatment reached 99.51% under UV irradiation. The kinetic of MO degradation followed the pseudo‐ first order with and without UV (R2 = 0.9528 and 0.9684, respectively). Therefore, TiO2 and SnO2 dopped into PbO2 layer, created a composite with good photoelectrocatalytic activity.