Skip to main content
SpringerLink
Log in

Physicochemical investigation of the solubilization of cobalt nitrate in sodium bis(2-ethylhexyl)sulfosuccinate reversed micelles

  • Original Contribution
  • Published:
Colloid and Polymer Science Aims and scope Submit manuscript

Abstract.

A wide investigation of the solubilization of the water-soluble salt Co(NO3)2 in water/sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/n-heptane microemulsions and of some physicochemical properties of the Co(NO3)2/AOT/n-heptane and Co(NO3)2/AOT systems has been carried out. After saturation of water/AOT/n-heptane microemulsions with pure Co(NO3)2, the Co(NO3)2/AOT composites were prepared by complete evaporation under vacuum of the volatile components (water and apolar solvent) of the salt-containing microemulsions. It was observed that these composites could be totally dissolved in pure n-heptane, allowing the solubilization of a noticeable amount of Co(NO3)2 in a dry apolar organic solvent. By UV–vis–near-IR spectrophotometry, some information on the state of Co(NO3)2 within water-containing or dry AOT reversed micelles was acquired, whereas by small-angle X-ray scattering it the occurrence of small nanoparticles in the salt-containing dry AOT reversed micelles was ascertained. Surprisingly, the analysis of the X-ray diffraction spectra corroborated by UV–vis and X-ray photoelectron spectroscopy data of Co(NO3)2/AOT composites led to the hypothesis that nanoparticles are mainly constituted of sodium nitrate resulting from the metathesis reaction between AOT and Co(NO3)2. By transmission electron microscopy, information on the size and the size distribution of the nanoparticles in salt/AOT composites was gained.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Author information

Authors and Affiliations

  1. Department of Physical Chemistry, University of Palermo, Via Archirafi 26, 90123 Palermo, Italy, , , , ,

    C. Giordano &  V. Turco Liveri

  2. ICTPN, Istituto di Chimica e Tecnologia dei Prodotti naturali, Via U. La Malfa 153, 90146 Palermo, Italy, , , , ,

    A. Longo &  A. Venezia

Authors
  1. C. Giordano
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. Longo
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. V. Turco Liveri
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. Venezia
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Electronic Publication

Rights and permissions

Reprints and permissions

About this article

Cite this article

Giordano, .C., Longo, .A., Turco Liveri, .V. et al. Physicochemical investigation of the solubilization of cobalt nitrate in sodium bis(2-ethylhexyl)sulfosuccinate reversed micelles. Colloid Polym Sci 281, 229–238 (2003). https://doi.org/10.1007/s00396-002-0760-6

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00396-002-0760-6

Search

Navigation