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Article
A simple biogenic route to rapid synthesis of Au@TiO2 nanocomposites by electrochemically active biofilms
J Nanopart Res (2012)
  • Mohammad Mansoob Khan, Dr
  • M. H. Cho
Abstract
Deposition of gold on titanium dioxide (TiO2) nanoparticles is highly beneficial for maximizing the efficiency of many photocatalytic reactions. In this study, we have reported for the first time the use of an electrochemically active biofilm (EAB) for the synthesis of Au@TiO2 nanocomposite with sodium acetate as the electron donor. The EAB acts as an electron generator for the reduction of gold ions on the surface of TiO2 nanoparticles. It was observed that the TiO2 plays not only as a support for the gold nanoparticles but also as a storage of electrons produced by the EAB within the particles. These stored electrons dramatically increase the reduction of gold ions and hence we have observed the formation of the Au@TiO2 nanocomposites within 90 min. A mechanism of the nanocomposite formation is also proposed. The as-synthesized nanocomposites were characterized by UV–Vis absorption spectroscopy to monitor the proper formation of the nanocomposites.
Keywords
  • Electrochemically active biofilm,
  • Nanocomposite,
  • Biogenic route,
  • Electron storage
Disciplines
Publication Date
July 30, 2012
Citation Information
Mohammad Mansoob Khan and M. H. Cho. "A simple biogenic route to rapid synthesis of Au@TiO2 nanocomposites by electrochemically active biofilms" J Nanopart Res Vol. 14 (2012)
Available at: http://works.bepress.com/mmansoob_khan/19/