Abstract
The structure of zinc acetate derived precursor currently used in the sol-gel synthesis of ZnO nanoparticles is described. The reaction products obtained before and after reflux of ethanolic zinc acetate solution have been studied by UV-Vis, photoluminescence, FTIR and EXAFS at the Zn K edge. EXAFS results evidence for both precursor solutions a change from the octahedral coordination sphere of oxygen atoms characteristic of the solid zinc acetate dihydrate compound into a four-fold environment. The EXAFS spectra of precursor solutions can be satisfactorily reproduced using the molecular structure reported for Zn4O(Ac)6 (Ac = COOCH3). UV-Vis and FTIR measurements are also in agreement with the formation of this oligomeric precursor. The structural modification is more pronounced after reflux at 80°C, because the increase of the Zn4O(Ac)6 amount and the formation of nearly 3.0 nm sized ZnO nanoparticle.
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Tokumoto, M., Briois, V., Santilli, C. et al. Preparation of ZnO Nanoparticles: Structural Study of the Molecular Precursor. Journal of Sol-Gel Science and Technology 26, 547–551 (2003). https://doi.org/10.1023/A:1020711702332
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DOI: https://doi.org/10.1023/A:1020711702332