Control of the particle size of gold on tin modified silica support

Ferenc Somodi, Irina Borbáth, Mihály Hegedus, István E. Sajó, József L. Margitfalvi

Research output: Contribution to journalConference article

Abstract

In this study we describe a two-step synthesis method for the preparation of gold nanoparticles supported on tin modified silica. The key step of the preparation procedure is the formation of surface grafted organotin complexes. The reduction of these surface species in a hydrogen atmosphere resulted in both metallic (Sn°) and ionic (Sn2+) forms of tin. These forms of tin are capable to reduce gold from chloroauric acid solution forming gold nanoparticles with high dispersion on the surface of silica. It has been found that the particle size of gold strongly depends on the pH value of the gold solution and the presence or absence of ammonia.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalMaterials Science Forum
Volume589
DOIs
Publication statusPublished - Jan 1 2008
Event6th Hungarian Conference on Materials Science - Siofok, Hungary
Duration: Oct 14 2007Oct 16 2007

Keywords

  • Gold catalysts
  • Seed mediated growth of gold
  • Supported gold nanoparticles
  • Surface organometallic chemistry
  • TEM
  • XRD

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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