Characterization and catalytic activity of gold nanoparticles synthesized by autoreduction of aqueous chloroaurate ions with fumed silica

Priyabrata Mukherjee, Chitta Ranjan Patra, Anirban Ghosh, Rajiv Kumar, Murali Sastry

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

In this report, a novel method for the synthesis of gold nanoparticles on an amorphous silica support is described wherein silanol groups on the surface of the fumed silica spontaneously reduce aqueous chloroaurate ions. This results in the formation of gold nanoparticles that are bound fairly strongly to the fumed silica surface. Alkylamine molecules present in solution were observed to reduce the size of the gold nanoparticles thus formed by self-assembling on the nanoparticles and preventing further growth. The gold nanoparticle size is dependent on the concentration of alkylamine molecules in solution. The gold nanoparticle-fumed silica composite material was found to be catalytically active in the hydrogenation of cyclohexene.

Original languageEnglish (US)
Pages (from-to)1678-1684
Number of pages7
JournalChemistry of Materials
Volume14
Issue number4
DOIs
StatePublished - Apr 29 2002

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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