Ternary photocatalyst based on conducting polymer doped functionalized multiwall carbon nanotubes decorated with nanorods of metal oxide

摘要： The ternary photocatalyst PEDOT@ZnO@MWCNTs was fabricated using chemical oxidative method of polymerization. The fabrication of the catalyst was further investigated using spectroscopic techniques namely UV–Visible, FT-IR, XRD and the surface morphology was explored by SEM and TEM. The photodegradation kinetics of the azo dye MO followed pseudo first order kinetics at different pH. The photodegradation of the dye was studied in presence of PEDOT@ZnO@MWCNTs on irradiation with visible source of light. The redox activity of the photocatalyst was investigated by cyclic voltammetric technique and the mechanism of the photocatalysis was established via electronic impedance study. The evaluated value of rate constant, half life time period and the degradation efficiency sustenance the competence of the photocatalyst for the photodegradation of MO at the optimum pH value of 3.5. The chemical oxygen demand (COD) analysis was also favored the mineralization of the dye in presence of photocatalyst.