New Method of Preparation ZnS Nano size at low pH

摘要

Nano particles of zinc sulfide (ZnS) have been prepared by simple reaction between zinc chloride(ZnCl2) and sodium sulfide (Na2S) in aqueous solution at pH=3 as source materials .Thecharacterization of the product was done by UV-VIS absorption, photoluminescence (PL) spectra, x- ray diffraction (XRD) and atomic force microscopy (AFM). The sizes of the sample as prepared werecalculated by Debye-Scherrer formula according to XRD spectra. A UV-VIS optical spectroscopystudy was carried out to determine the band gap of the nanoparticle ZnS to be about 4.27 eV. Theroom temperature photoluminescence spectra of the powder showed two peaks centered on 367 nmand 491 nm .The I-V characteristics are observed in dark and under illumination showingphotosensitive nature of the ZnS powder.