Abstract
In the present work, we report the synthesis and optical properties of ZnS nanoparticles produced by the mechano-chemical route. We used zinc acetate and sodium sulphide as source materials in a high energy planetary ball mill at rotation speed of 300 rpm and vial rotation speed of 600 rpm with ball to powder (BPR or charge ratio CR) 5:1 for 30 and 90 min. The milled powders were washed with methanol to remove impurity and dried at 300 °C for 1 h. The prepared nanoparticles have been characterized using X-ray diffraction (XRD), Field emission scanning electron microscope (FESEM), UV-vis-NIR spectrophotometer and Fluorescence spectroscopy. The crystallite size of the synthesized ZnS nanoparticles is found to be in the range 7-8 nm which was calculated using Debye-Scherers formula. The value of optical band gap has been found to be in the range 3.80-4.15 eV. Room temperature photoluminescence (PL) spectrum of ZnS samples exhibit a blue emission peaked at 466 nm under UV excitation.
Original language | English |
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Pages (from-to) | 3309-3312 |
Number of pages | 4 |
Journal | Physica B: Condensed Matter |
Volume | 407 |
Issue number | 17 |
DOIs | |
State | Published - 1 Sep 2012 |
Externally published | Yes |
Keywords
- Band gap
- Mechanochemical
- Milling
- Optical absorption
- Semiconductor nanoparticles
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering