Synthesis and Microscopic Study of Zinc Sulfide Nanoparticles

The ZnS semiconductor nanoparticles were synthesized by wet chemical synthesis routes from zinc acetate [Zn(CH3 COO$)_{2}]$ as source of zinc and sodium sulfide (Na2S) as source of sulfur, where ascorbic acid were used as capping agents. The structural, morphological, and optical properties of synthesized nanoparticles had been characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and UV-visible spectra (UV-Vis). XRD analysis shows that as synthesized samples were cubic structure and the average sizes of crystal were estimated 2.3 nm and 2.1 nm at $20^{\circ}C$ and $45^{\circ}C$, respectively using Debye Scherer’s equation. The band gap energy of ZnS nanoparticles determined from the UV-Vis spectra are 3.9 eV and 4.19 eV synthesized at $20^{\circ}C$ and $45^{\circ}C$, respectively. The size estimated from XRD pattern was further verified from TEM image and UV-Vis spectra.