Preparation and stabilization of gold nanoparticles formed by in situ reduction of aqueous chloroaurate ions within surface-modified mesoporous silica

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

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Abstract

A convenient method for the synthesis and simultaneous stabilization of gold nanoparticles in organo-functionalized MCM-41 is described. The silanol groups present on the surface of the mesoporous matrix reduce aqueous chloroaurate ions, resulting in the formation of gold nanoparticles, which are subsequently anchored to the host matrix via organic functionality. The method, in which propylamine-MCM-41 or propylthiol-MCM-41 is treated with a dilute aqueous solution of HAuCl4 at ambient conditions, is quite simple and environmentally benign as there is no need to add any external reducing agent. The nano-Au-MCM-41 hybrid materials were characterized by XRD, UV-Vis, TEM, XPS, EDX and N2 adsorption measurements.

Original languageEnglish
Pages (from-to)201-211
Number of pages11
JournalMicroporous and Mesoporous Materials
Volume58
Issue number3
DOIs
Publication statusPublished - 18 Mar 2003
Externally publishedYes

Keywords

  • Auto-reduction
  • Gold nanoparticle
  • MCM-41
  • Organo-functionalized mesoporous silica
  • Organo-inorganic nanocomposite

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