Journal of Sol-Gel Science and Technology

, Volume 74, Issue 3, pp 748–755 | Cite as

Three modes of high-efficient photocatalysis using composites of TiO2-nanocrystallite-containing mesoporous SiO2 and Au nanoparticles

  • Teruhisa Okuno
  • Go Kawamura
  • Hiroyuki Muto
  • Atsunori Matsuda
Original Paper
First Online:
Received:
Accepted:

Abstract

A mesoporous SiO2 template containing TiO2 nanocrystals is synthesized via a sol–gel route, and Au nanoparticles (NPs) are deposited in the tubular mesochannels of the template by a photodeposition method (Au/SiO2–TiO2). Both of the photocatalytic activities under ultraviolet (UV) and visible (Vis) light irradiation are improved by the deposition of Au NPs. A commercially available photocatalyst, Degussa P25 is employed as a reference, and a comparative study shows that Au/SiO2–TiO2 possesses higher photocatalytic activity than that of P25. An action spectrum of methylene blue (MB) photobleaching using Au/SiO2–TiO2 reveals that the photocatalysis of Au/SiO2–TiO2 is carried out by three triggers: UV absorption by TiO2, and Vis light absorptions by Au NPs and MB.

Graphical abstract

Keywords

Mesoporous Titania Photocatalysis Surface plasmon resonance 
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Supplementary material

10971_2015_3658_MOESM1_ESM.docx (58 kb)
Supplementary material 1 (DOCX 58 kb)

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Teruhisa Okuno
    • 1
  • Go Kawamura
    • 1
  • Hiroyuki Muto
    • 1
  • Atsunori Matsuda
    • 1
  1. 1.Department of Electrical and Electronic Information EngineeringToyohashi University of TechnologyToyohashiJapan

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