Effect of Calcination Temperature and Reaction Time on the Properties of CdS Nanoparticles Prepared by Sol-Gel Method

Document Type : Research Paper

Authors

1 M. Sc. Student of Physics, Department of Physics, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran.

2 Assistant Professor, Department of Physics, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran

3 Professor, Department of Physics, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

Abstract

In this research, cadmium sulphide (CdS) nanoparticles were prepared by sol-gel chemical method. After reaching the appropriate synthesis method, the reaction time of these nanoparticles were studied.  Three samples were synthesized with different reaction times of 60, 100 and 140 minutes, and analyzed with X-ray diffraction (XRD). According to the results, the sample with the reaction time of 140 minutes was recognized as the best sample. These samples (with a reaction time of 140 min) are calcinated at temperatures 500, 600, 700 and 800˚C and their properties are compared. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) were used for characterization of the samples. SEM and XRD were used to investigate the morphology and crystal structures. X-ray diffraction results showed that the purity of cadmium sulfide nanoparticles and their crystallinity and the size of crystallites were increased with increasing calcination temperature and stronger scattering pattern peaks, which was predictable. The structure of nanoparticles was also hexagonal. The SEM images depicted the spherical shape of nanoparticles. It also measured the average size of nanoparticles about 67nm, which was increased with increasing temperature. The EDS results also showed the atomic percentage and the weight percentage correctly.

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References

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History

  • Receive Date: 16 March 2019
  • Revise Date: 23 May 2020
  • Accept Date: 27 June 2020

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