Metal nanoparticle formation on layer silicate lamellae

Szilvia Papp, Rita Patakfalvi, I. Dékány

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Nanoparticles (Ag, Pd) were prepared by heterogeneous nucleation on the interlayer space of layered montmorillonite and kaolinite minerals in aquatic dispersion. Interlamellar incorporation of nanoparticles was monitored by X-ray diffraction and verified by transmission electron microscopy (TEM). After the reduction of adsorbed metal ions, a new Bragg reflection appeared, proving the formation of nanoparticles in the interlamellar space of clay mineral. Lamellar structure of layered silicates is partly destroyed by the particle formation. TEM images showed that larger nanoparticles were formed by UV irradiation and hydrazine hydrate than in the case of reduction by NaBH4. Aqueous solutions of polyvinyl pyrrolidone and clay minerals were used for the stabilization of Pd° nanoparticles. The size of particles generated on the surface of clay minerals by heterogeneous nucleation increased with increasing metal concentration. When polymer is added to this system, particle size can be decreased by increasing polymer concentration. In this case, the particles are stabilized by the concerted action of the support and the macromolecule. The polymers promoted intercalation of nanoparticles into the clay mineral. In the absence of nanoparticles, the intercalation of polymers was significantly less extensive.

Original languageEnglish
Pages (from-to)3-14
Number of pages12
JournalColloid & Polymer Science
Volume286
Issue number1
DOIs
Publication statusPublished - Jan 2008

Fingerprint

Silicates
Metal nanoparticles
lamella
silicates
Clay minerals
Nanoparticles
nanoparticles
minerals
clays
Polymers
metals
hydrazine
polymers
Intercalation
intercalation
Nucleation
nucleation
Polyvinyls
Transmission electron microscopy
Bentonite

Keywords

  • Layered silicate
  • Nanoparticle formation
  • Palladium
  • Silver
  • TEM
  • XRD

ASJC Scopus subject areas

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

Cite this

Metal nanoparticle formation on layer silicate lamellae. / Papp, Szilvia; Patakfalvi, Rita; Dékány, I.

In: Colloid & Polymer Science, Vol. 286, No. 1, 01.2008, p. 3-14.

Research output: Contribution to journalArticle

Papp, Szilvia ; Patakfalvi, Rita ; Dékány, I. / Metal nanoparticle formation on layer silicate lamellae. In: Colloid & Polymer Science. 2008 ; Vol. 286, No. 1. pp. 3-14.
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