Sono- and photochemical routes for the formation of highly dispersed gold nanoclusters in mesoporous titania films

Jimmy C. YU, Xinchen WANG, Ling WU, Wingkei HO, Lizhi ZHANG, Gentao ZHOU

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79 Citations (Scopus)

Abstract

A sono- and photochemical approach has been developed to incorporate highly dispersed gold nanoclusters into mesoporous TiO2 films. The first step involves the sonication of a TiO2 film immersed in a gold chloride solution. This effectively removes the air trapped in the porous film matrix and drives the gold chloride into the pore channels, leading to a homogeneous adsorption of ionic Au in the TiO2 mesoporous matrix. The second step takes advantage of the photocatalytic property of TiO2 to reduce the adsorbed Au ions to Au0. As the gold nanoclusters thus produced are stabilized by the TiO2 mesonetwork, no organic capping molecules are required. Highly dispersed Au/TiO2 nanoheterojunction arrays can be obtained using this interesting approach. Copyright © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original languageEnglish
Pages (from-to)1178-1183
JournalAdvanced Functional Materials
Volume14
Issue number12
DOIs
Publication statusPublished - Dec 2004

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Nanoclusters
nanoclusters
Gold
titanium
Titanium
routes
gold
Sonication
chlorides
matrices
Ions
Adsorption
Molecules
Air
porosity
adsorption
titanium dioxide
air
molecules
ions

Citation

Yu, J. C., Wang, X., Wu, L., Ho, W., Zhang, L., & Zhou, G. (2004). Sono- and photochemical routes for the formation of highly dispersed gold nanoclusters in mesoporous titania films. Advanced Functional Materials, 14(12), 1178-1183. doi: 10.1002/adfm.200305145

Keywords

  • Gold
  • Mesoporous materials
  • Nanoparticles, gold
  • Sol-gel synthesis
  • Titania