Journal of Sol-Gel Science and Technology

, Volume 39, Issue 1, pp 25–36

In situ and simultaneous nanostructural and spectroscopic studies of ZnO nanoparticle and Zn-HDS formations from hydrolysis of ethanolic zinc acetate solutions induced by water

  • Valerie Briois
  • Christine Giorgetti
  • Elisabeth Dartyge
  • Francois Baudelet
  • Miriam S. Tokumoto
  • Sandra H. Pulcinelli
  • Celso V. Santilli
Article

DOI: 10.1007/s10971-006-6973-2

Cite this article as:
Briois, V., Giorgetti, C., Dartyge, E. et al. J Sol-Gel Sci Technol (2006) 39: 25. doi:10.1007/s10971-006-6973-2

Abstract

The simultaneous formation of nanometer sized zinc oxide (ZnO), and acetate zinc hydroxide double salt (Zn-HDS) is described. These phases, obtained using the sol-gel synthesis route based on zinc acetate salt in alcoholic media, were identified by direct characterization of the reaction products in solution using complementary techniques: nephelometry, in situ Small-Angle X-ray Scattering (SAXS), UV-Vis spectroscopy and Extended X-ray Absorption Fine Structures (EXAFS). In particular, the hydrolytic pathway of ethanolic zinc acetate precursor solutions promoted by addition of water with the molar ratio N=[H2O]/[Zn2+] = 0.05 was investigated in this paper. The aim was to understand the formation mechanism of ZnO colloidal suspension and to reveal the factors responsible for the formation of Zn-HDS in the final precipitates. The growth mechanism of ZnO nanoparticles is based on primary particle (radius ≈ 1.5 nm) rotation inside the primary aggregate (radius <3.5 nm) giving rise to an epitaxial attachment of particles and then subsequent coalescence. The growth of second ZnO aggregates is not associated with the Otswald ripening, and could be associated with changes in equilibrium between solute species induced by the superficial etching of Zn-HDS particles at the advanced stage of kinetic.

Keywords

Quantum dots ZnO Particle formation and growth SAXS UV-Vis EXAFS Turbidity 

Copyright information

© Springer Science + Business Media, LLC 2006

Authors and Affiliations

  • Valerie Briois
    • 1
    • 2
  • Christine Giorgetti
    • 1
  • Elisabeth Dartyge
    • 1
  • Francois Baudelet
    • 2
  • Miriam S. Tokumoto
    • 3
    • 4
  • Sandra H. Pulcinelli
    • 3
  • Celso V. Santilli
    • 3
  1. 1.LURECentre Universitaire Paris-SudOrsay CedexFrance
  2. 2.Synchrotron SOLEILL’Orme des MerisiersGif-sur Yvette CedexFrance
  3. 3.Instituto de Quimica, UNESPAraraquaraBrazil
  4. 4.Departamento de Engenharia QuímicaUFSCarSão Carlos

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