Highly active WO3-Ag-ZnO photocatalyst driven by day light illumination

► The WO3-Ag-ZnO was successfully synthesized by precipitation-decomposition method. ► The catalyst is found to be reusable. ► Treatment of dye effluent using WO3-Ag-ZnO will be more economical and eco-friendly. ► Dye degradation mechanism based on band energy levels is proposed. ► COD measurements confirm the complete mineralization of the dye molecule.