Hanan Abd Ali Thjeel Al-Ogaili
Wassit University, Iraq
Title: Synthesis of colloidal zinc sulfide nanoparticles via chemical route and study of structural & optical features for it
Biography
Biography: Hanan Abd Ali Thjeel Al-Ogaili
Abstract
In this work, the zinc sulfide (ZnS) nanoparticles were synthesized by simple chemical route at room temperature and using zinc chloride powder (ZnCl2) and sodium sulfide powder (Na2S) as basic materials, ZnS nanocrystals were measured by X-ray diffraction (XRD), ultraviolet–visible spectroscopy (UV-VIS) and fluorescence (PL) spectrophotometry. The optical properties and structure of nanoparticles had been investigated. The results showed high absorbance in near UV regions of spectrum, while the grain size of ZnS nanoparticles had calculated to be approximately (1.94- 2.75) nm from XRD test and optical energy gap of the nanoparticles was found to be in the range of 3.8eV. Photo luminescence (PL) spectra of the samples had illustrated blue-light emission when the samples were excited by UV light with wave length at 250 nm. Also, the PL results observed that the bands emission (multiple peaks) were broad and strong and were centered at three positions at 310 nm, 350 nm and 400 nm.