Stabilization of rhodium nanoparticles in aqueous medium by polymer and layered silicates

Szilvia Papp, József Szél, Imre Dekany

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The synthesis of rhodium nanoparticles was studied in aqueous polymer solution and on layered montmorillonite and kaolinite minerals. Rhodium particles were stabilized by polymer and by the lamellae of layer silicates. The effect of the concentration of the rhodium precursor and polymer on the size of the particles formed was studied using neutral polivinylpyrrolidone. Reduction was done by sodium borohydride. Expansion of the interlayer space in kaolinite was effected by intercalation of dimethyl sulfoxide at 65°C. Interlamellar incorporation of nanoparticles was monitored by X-ray diffraction and small angle X-ray scattering, the size and the size distribution function were determined by transmission electron microscopy. Average particle size fell in the range of 1-3 nm, depending on the stabilization method used and the concentration of precursor rhodium ions. The valence of the rhodium particles on the support surface was examined by XPS analysis.

Original languageEnglish
Pages (from-to)646-656
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5118
DOIs
Publication statusPublished - Sep 19 2003
EventNonatechnology - Maspalomas, Gran Canaria, Spain
Duration: May 19 2003May 21 2003

Keywords

  • Kaolinite
  • Montmorillonite
  • Nanoparticles
  • Rhodium
  • SAXS
  • Stabilization by polymer
  • TEM
  • XPS
  • XRD

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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