Journal of Nanoparticle Research

, 15:1881 | Cite as

Synthesis and characterization of highly concentrated AgI–[P6,6,6,14]Cl ionanofluids

  • I. Rodríguez-Palmeiro
  • B. Rodríguez-Cabo
  • E. Rodil
  • A. Arce
  • J. M. Saiz-Jabardo
  • A. Soto
Research Paper


A novel method, recently proved useful for the synthesis of nanoparticles, has been now used for the preparation of very stable silver iodide–trihexyl(tetradecyl)phosphonium chloride ionanofluids. Only the ionic liquid and the AgI bulk powder were needed. Synthesized nanofluids are much more stable than those obtained by simple dispersion of the nanoparticles in the base fluid. The ionanofluids were synthesized at different concentrations (up to 50 % w/w) and characterized in terms of physical, electrical, and thermal properties (density, viscosity, refractive index, electric conductivity, and specific heat capacity). A very high increase in the electric conductivity of the base ionic liquid was expected due to the high concentration of nanoparticles achieved. Nonetheless, it was not found, probably due to the reduction of ions mobility caused by the increase of the viscosity in ionanofluids with concentrations over 20 % w/w. An appropriate characterization of nanoparticles composing the nanofluids was carried out (UV–Vis absorbance, shape and size distribution). The diameter of the particles was measured and calculated by different techniques and approximations, obtaining a value of 2–4 nm. They were spherical, well-defined, and not agglomerated, with a narrow size distribution. The X-ray powder diffraction confirmed that no structural change took place in the transformation of the bulk solid to nanoparticles.


Nanofluids Silver iodide Ionic liquid Synthesis Characterization 



The authors acknowledge the financial support from Xunta de Galicia through project 10REM265008PR and from Galician Network on Ionic Liquids REGALIs (CN 2012/120). They want to thank Cytec for kindly supplying the ionic liquid. B Rodríguez-Cabo is also grateful to the Ministry for Science and Innovation of Spain for the award of a FPI grant (ref. BES-2010-033448).


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • I. Rodríguez-Palmeiro
    • 1
  • B. Rodríguez-Cabo
    • 1
  • E. Rodil
    • 1
  • A. Arce
    • 2
  • J. M. Saiz-Jabardo
    • 2
  • A. Soto
    • 1
  1. 1.Department of Chemical EngineeringUniversity of Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Department of Naval EngineeringUniversity of A CoruñaFerrolSpain

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