Synthesis Structure And Characterization Of Zns Qds And Using It In Photocatalytic Reaction

Abstract ZnS nanoparticles were prepared by a simple microwave irradiation method under mild condition. The starting materials for the synthesis of ZnS quantum dots were zinc acetate R 26 M Chemical as zinc source thioacetamide as a sulfur source and ethylene glycol as a solvent. All chemicals were analytical grade products and used without further purification. The quantum dots of ZnS with cubic structure were characterized by X-ray powder diffraction XRD the morphology of the film is seen by scanning electron microscopy SEM. The particle size is determined by field effect scanning electron microscopy FESEM UV-Visible absorption spectroscopy and XRD. UV-Visible absorption spectroscopy analysis shows that the absorption peak of the as-prepared ZnS sample 310 nm displays a blue-shift comparing to the bulk ZnS 345 nm. Photoluminescence spectra of the samples revealed a broad peak centered at 404nm which were related to excitonic emission. Photocatalytic degradation of Methylene Blue MB dye catalyzed by synthesized nanoparticles was studied under solar radiation photocatalytic degradation increased with increasing time exposure to solar light.