Photodegradation of Methylred using Ag-doped Fe3O4 Nanoparticles

A modified photocatalyst, Ag-doped Fe3O4 nanoparticle that can photodegrade effectively the organic pollutants, specifically methylred, an anionic azo dye in the dispersion system via a green chemicstry route is reported in this paper. The uniqueness of the potential photocatalyst is its subsequent recyclability by applying magnetic force. The synthesized photocatalyst by liquid impregnation method was characterized by XRD, SEM and EDX spectral techniques. An enhancement in the degradation rate was observed with Ag-doped Fe3O4 /UV/H2O2 system. The effect of various parameters such as irradiation time of sun light/ UV light/ amount of photocatalyst/pH/dye concentration on the decolourisation process was investigated. The degradation kinetics of methyl red by the photocatalyst was analysed by Langmuir-Hinshelwood model. The results revealed that photcatalytic degradation of methylred by Ag-doped Fe3O4 could be considered as a practical and reliable technique for the removal of environmental pollutants.