Mechano-chemical synthesis and optical properties of ZnS nanoparticles

C. S. Pathak, V. Agarwala, M. K. Mandal

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

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 languageEnglish
Pages (from-to)3309-3312
Number of pages4
JournalPhysica B: Condensed Matter
Volume407
Issue number17
DOIs
StatePublished - 1 Sep 2012
Externally publishedYes

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

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