| Autor: |
Subhashini, P., Lakshminarayan, N., Selvakumari, D., Sreejavijay |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2017, Vol. 1859 Issue 1, p1-7, 7p, 3 Black and White Photographs, 1 Diagram, 3 Charts, 7 Graphs |
| Abstrakt: |
A simple solid state reaction route has been proposed to synthesize ZnS nanoparticles with a good stoichiometry and thermal stability. In this method, ZnS nanoparticles were prepared by dry mechanochemical (DMC) reaction of zincacetate and thioacetamide at room temerature. Four samples were prepared by varying the molar ratio of thioacetamide while retaining the zincacetate content, to synthesize ZnS nanoparticles with a good stoichiometry. The samples were annealed at 450°C in the presence of air . The prepared samples were characterised by X - ray diffraction (XRD), Scanning electron microscopy (SEM), and Energy dispersive X - ray analysis (EDX). The results confirm that the synthesized particles were ZnS with Zinc blende phase and have a good thermal stability in the presence of oxygen. A better stoichiometry is obtained when the molar ratio of zincacetate and thioacetamide is 1 : 1.1 Optical characterization was done on one of the samples by observing UV - Visible and Photoluminescence spectra. The UV-Visible transmission spectra indicates that the synthesized ZnS nanoparticles serve as a good absorber of UV radiation and the optical band gap of the synthesized sample is found to be 3.67eV. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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