Synthesis and electrophoretic concentration of nanoparticles of CdS in reversed micellar solutions

A. I. Bulavchenko, A. A. Sap'Yanik, M. G. Demidova

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Stable organosols of cadmium sulfide are obtained via the ion exchange reaction of cadmium nitrate with sodium sulfide in reversed micellar solutions of Brij-30 in n-decane and are characterized by means of spectrophotometry, luminescence, photon correlation spectroscopy (PCS), and transmission electron microscopy (TEM). It is established that adding anionic surfactant AOT to organosols produces double electric layers on the surfaces of nanoparticles and contributes to an additional 50-fold electrophoretic concentration. Electrophoretic concentrates of cadmium sulfide nanoparticles (0.5 M) are obtained in cells with vertical orientation of the electrodes and periodic changes in polarity. The average diameter of the nanoparticles according to TEM data is 5 nm, considerably less than the hydrodynamic diameter found by PCS (70 nm), testifying to the complex structure of a mixed adsorption layer surrounding a nanoparticle.

Original languageEnglish
Pages (from-to)509-514
Number of pages6
JournalRussian Journal of Physical Chemistry A
Volume88
Issue number3
DOIs
Publication statusPublished - Mar 2014

Keywords

  • cadmium sulfide
  • electrophoretic concentration
  • nanoparticles
  • photon correlation spectroscopy

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