Abstract

R.  P. PAWAR

DOI : http://dx.doi.org/10.13005/ojc/290341

Different samples of  ZnS  nanoparticals were synthesized by chemical co-precipitation method at room temperature using zincsulphate as zinc source and sodium sulphide as sulphur source.  Structural  properties of synthesized ZnS nanoparticles  were studied by X-ray diffraction pattern (XRD) while optical properties were examined by  UV-Visible absorption spectroscopy. XRD pattern showed the as synthesized ZnS nanoparticles have cubic zinc blended structure with 2.0-2.87 nm average crystallite size and lattice constant a=5.829 A^o. UV-Visible absorption spectrum showed the band gap energy of the ZnS nanoparticals corresponding to absorption edge are found in the range of 2.63eV-3.87eV, which shows increase in band gap with the decrease of crystallite size of the nanoparticles.

ZnS nanoparticals;co-precipitation,;XRD;UV-Vis spectrum;Band gap

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