Nucleation and growth of palladium nanoparticles stabilized by polymers and layer silicates

Szilvia Papp, Imre Dékány

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Palladium nanoparticles were synthesized in aqueous medium via reduction by hydrazine using various polymers (polyvinylpyrrolidone and polystyrene sulfonate) and the clay mineral hectorite as stabilizers. The kinetics of homogeneous and heterogeneous nucleation processes was studied by UV-visible spectrophotometry. The effect of the polymer and concentration of the silicate and palladium ions on particle formation rate was investigated. The size of the nanoparticles were determined by transmission electron microscopy. Both polymers and the silicate lamellae were found to be capable of stabilizing the particles. The rate of reduction is decreased by increasing amounts of stabilizing agents and increased by increasing concentrations of precursor ions. The kinetics of heterogeneous nucleation was determined by the adsorption of the palladium species at the clay mineral particles and the viscosity of the hectorite dispersion.

Original languageEnglish
Pages (from-to)1049-1056
Number of pages8
JournalColloid & Polymer Science
Volume284
Issue number9
DOIs
Publication statusPublished - Jun 2006

Fingerprint

Silicates
Palladium
palladium
silicates
Polymers
Nucleation
hydrazine
nucleation
Nanoparticles
Clay minerals
nanoparticles
clays
polymers
minerals
Ions
Povidone
Kinetics
Excipients
Hydrazine
Spectrophotometry

Keywords

  • Palladium nanoparticles
  • Stabilization by polymer and silicate layers
  • TEM
  • UV-VIS spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry
  • Colloid and Surface Chemistry

Cite this

Nucleation and growth of palladium nanoparticles stabilized by polymers and layer silicates. / Papp, Szilvia; Dékány, Imre.

In: Colloid & Polymer Science, Vol. 284, No. 9, 06.2006, p. 1049-1056.

Research output: Contribution to journalArticle

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