photocatalytic degradation of methylene blue under visible light using pvpcapped undoped and ni doped zns nanocrystalline powder

Ni doped and undoped ZnS nanocrystalline powders were synthesized by a Wet Chemical Synthesis method. The synthesized products were characterized by X-ray diffraction, scanning electron microscope, field emission electron microscope and ultraviolet–visible spectrometer. The X-ray diffraction and field emission electron microscope studies show that the size of crystallites is in the range of 1–3 nm. Photocatalytic activities of undoped and Ni doped ZnS were evaluated by decolorization of Methylene Blue in aqueous solution under visible light irradiation. It was found that the Ni doped ZnS bleaches Methylene Blue much faster than the undoped ZnS upon its exposure to the visible light.