Influence of Precursor and Power Irradiation on the Microwave-Assisted Synthesis of ZnS Nanoparticles

Abstract

Results on the synthesis of ZnS nanoparticles from ZnSO ₄ and Zn(CH ₃ COO) ₂ as precursors under microwave (MW) heating conditions are reported. An MW oven (1650 W) operating at 60 and 100% of the nominal power in periods for 60 s was employed. The obtained dispersions were analyzed by UV-Vis spectroscopy, X-ray diffraction, photoluminescence, and transmission electron microscopy. The results show that the dispersion concentration depends mainly on the applied power, whereas the luminescent properties are related with the employed precursors, because the sulfate ions promote the electronic transition in the ZnS nanoparticles, synthesized with a mean radius of 7.1 nm and possessing a hexagonal morphology.

Keywords:

• nanoparticles
• ZnS
• microwaves
• synthesis