Open Access

ARTICLE

Influence of chromium concentration on the structural, optical, magnetical, and thermal properties of ZnS nanocrystals

R. Selva^a, I. Devadoss^b,*, A. Krishnamoorthy^b, S. P. Sheeba^b

a Srinivasan College of Arts and Science (Affiliated to Bharathidasan University, Tiruchirappalli), Perambalur-621 212, Tamil Nadu, India
b PG & Research Department of Physics, Bishop Heber College (Affiliated to Bharathidasan University, Tiruchirappalli), Tiruchirappalli - 620 017, Tamilnadu, India

* Corresponding Author:

Chalcogenide Letters 2024, 21(9), 747-755. https://doi.org/10.15251/CL.2024.219.747

Received 08 April 2024; Accepted 18 September 2024;

Abstract

Pure ZnS and Zn_1-xCr_xS nanoparticles were successfully prepared using the coprecipitation method, where x represents the concentration (x = 0.00, 0.10, and 0.05). There are many analytical methods used, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and Spectroscopy of energy dispersive (EDS). The magnetism structure of the catalysts was investigated using spectrophotometry (VSM), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). X-ray diffraction studies determine the nanocrystal arrangement and size of microcrystals. As seen in SEM analysis, the particles are agglomerated. The coordination of sulfur ions around zinc ions was examined using FTIR analysis. The energy band gap of the Cr-doped sample increases. Photoluminescence spectroscopy showed that the violet emission around 424 nm could be attributed to the excitation process of electrons from the low energy of the conduction band to the valence band of sulfur intermediate atoms. The front amplitude of doped ZnS nanocrystals remains constant regardless of the amount of Cr present. The results show that the ZnS nanocrystals were replaced by dilute Cr ³⁺ ions. Cr-doped ZnS exhibits diamagnetic properties under hightemperature conditions. The results show that these materials are improved by the Cr doping process, making them suitable for many applications.

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Keywords

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