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Sol–gel synthesis, optical and structural characterization of ZrOS nanopowder

Journal of Sol-Gel Science and Technology volume 71, pages 79–85 (2014)Cite this article

Abstract

In this paper, we report the synthesis of tetragonal zirconium oxysulfide t-ZrOS nanopowder by the sol–gel method using water solution of a precursor containing thiourea [CS(NH2)2] and zirconium in the form of an anionic oxalate complex [Zr(C2O4)]4−. The tetragonal t-ZrOS structure with space group P4/nmm revealed by X-ray patterns showed preferred orientation along (101) plane. For surface morphology, compositional and optical absorption studies, scanning electron microscopy, energy dispersive X-ray and ultraviolet–visible spectroscopy were employed for characterization of the powder respectively. A nearly constant value of the refractive index at higher wavelength λ ≥ 1,100 nm was found to be 2.19. High indirect and direct optical band gap of ~2.0 and 2.50 eV with absorbance <40 % were obtained for the powder.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of Nigeria, Nsukka, Enugu State, Nigeria

    U. C. Uduh, R. M. Obodo, S. Esaenwi, C. I. Amaechi, P. U. Asogwa, R. U. Osuji & F. I. Ezema

  2. Centre for Basic Space Sciences, National Space Research and Development Agency, University of Nigeria, Nsukka, Enugu State, Nigeria

    S. Esaenwi

Authors
  1. U. C. Uduh
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  2. R. M. Obodo
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  3. S. Esaenwi
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  4. C. I. Amaechi
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  5. P. U. Asogwa
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  6. R. U. Osuji
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  7. F. I. Ezema
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Correspondence to C. I. Amaechi.

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Uduh, U.C., Obodo, R.M., Esaenwi, S. et al. Sol–gel synthesis, optical and structural characterization of ZrOS nanopowder. J Sol-Gel Sci Technol 71, 79–85 (2014). https://doi.org/10.1007/s10971-014-3331-7

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  • DOI: https://doi.org/10.1007/s10971-014-3331-7

Keywords

  • Tetragonal ZrOS nanopowder
  • Anionic oxalate complex
  • Sol–gel technique
  • Absorbance