Simple and surfactant free synthesis and characterization of CdS/ZnS core–shell nanoparticles and their application in the removal of heavy metals from aqueous solution

Amiri, Omid; Emadi, Hamid; Mostafa Hosseinpour-Mashkani, S Seyed; Sabet, Mohammad; Rad, Mosleh Mohammadi

Simple and surfactant free synthesis and characterization of CdS/ZnS core–shell nanoparticles and their application in the removal of heavy metals from aqueous solution

2014

Amiri, Omid | Emadi, Hamid | Mostafa Hosseinpour-Mashkani, S Seyed | Sabet, Mohammad | Rad, Mosleh Mohammadi

In the current study, CdS/ZnS core–shell nanoparticles were successfully synthesized from CdSO₄·8H₂O and Zn(NO₃)₂·6H₂O starting reagents in the presence of ultrasonic irradiation. The effects of preparation parameters such as ultrasonic power, irradiation time, and precursor concentration on the morphology of the CdS/ZnS core–shell nanoparticles and the removal of heavy metals (Hg⁺², Pb⁺²) were studied by SEM and batch adsorption studies. The as-synthesized products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution field-emission transmission electron microscopy (HRTEM), photoluminescence spectroscopy (PL), scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and ultraviolet-visible (UV-Vis) spectroscopy.

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