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Synthesis of ZnO aerogels nanopowders in supercritical methanol: effect of sol concentration on structural, morphological and optical properties

  • Original Paper: Nano- and macroporous materials (aerogels, xerogels, cryogels, etc.)
  • Published:
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Abstract

Nanocrystallines zinc oxide (ZnO) aerogels with different zinc acetate concentrations (0.05, 0.10, 0.15, 0.20, 0.25 and 0.30 mol/L) have been synthesized in supercritical methanol. The as-obtained products were analyzed without any additional heat or chemical treatments. The XRD study reveals that all the prepared nanopowders have good polycrystalline hexagonal wurtzite structure with the high crystalline quality obtained for aerogel prepared with a 0.20 M sol concentration. The lattice parameters are not dependent on the precursor concentration. The particle size has found to be related to the sol concentration. SEM micrographs have shown that the agglomeration state of the as-prepared ZnO nanoparticles is significantly affected by the sol concentration. FTIR measurements have indicated the displacement of the Zn–O vibration band to the higher wave numbers with increasing sol concentration. Raman results have confirmed that E2 bands intensity depends on precursor concentration. TGA measurements show that the aerogels contain only small quantities of volatiles. The optical absorption and room temperature photoluminescence emission are not affected considerably by Zn2+ concentration.

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Authors and Affiliations

  1. Laboratoire de Génie de l’Environnement (LGE), Université de Bejaia, 06000, Bejaia, Algeria

    M. Meddouri, L. Hammiche, D. Djouadi & A. Chelouche

  2. Laboratoire des Semi-Conducteurs, Université Badji Mokhtar, BP 12, 23000, Annaba, Algeria

    T. Touam

  3. Laboratoire de Cristallographie, Université Constantine 1, 25000, Constantine, Algeria

    B. Boudine

Authors
  1. M. Meddouri
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  2. L. Hammiche
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  3. D. Djouadi
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  4. A. Chelouche
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  5. T. Touam
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  6. B. Boudine
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Correspondence to D. Djouadi.

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Meddouri, M., Hammiche, L., Djouadi, D. et al. Synthesis of ZnO aerogels nanopowders in supercritical methanol: effect of sol concentration on structural, morphological and optical properties. J Sol-Gel Sci Technol 80, 642–650 (2016). https://doi.org/10.1007/s10971-016-4152-7

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  • DOI: https://doi.org/10.1007/s10971-016-4152-7

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