REMOVAL OF BG DYE IN SUNLIGHT AND DARK USING NiO AND ITS COMPOSITES WITH CuO AND ZnO

Abstract

NiO nanoparticles were synthesized by precipitation method and CuO and ZnO doped NiO nanocomposites were synthesized by co-precipitation method. The synthesized nanomaterials were characterized by UV, FT-IR, XRD and SEM with EDS studies. The photocatalytic properties of synthesized nanocomposites have been evaluated by the photodegradation of Brilliant Green (BG) under Sun light and Dark. In this investigation, the degradation capacities of prepared nanomaterials were analyzed at different catalyst dosage, pH, contact time, electron acceptor, and concentration were determined. The dye removal efficiency of the NiO/CuO nanocomposites is more than that of pure NiO nanomaterials. This enhanced photocatalytic activity can be ascribed to the low recombination probability of photoinduced carriers due to the efficient charge transfer in the nanocomposites. The synthesized NiO/CuO nanocomposite may be a promising candidate for dye photodegradation of wastewaters. The experimental data were best fit for the Langmuir and Freundlich isotherm and it follows pseuodo second oder model.