Fabrication of Shape-Controlled Au Nanoparticles in a TiO2-Containing Mesoporous Template Using UV Irradiation and Their Shape-Dependent Photocatalysis

doi:10.1016/j.jmst.2013.08.008

J. Mater. Sci. Technol.

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Fabrication of Shape-Controlled Au Nanoparticles in a TiO₂-Containing Mesoporous Template Using UV Irradiation and Their Shape-Dependent Photocatalysis

Teruhisa Okuno¹⁾, Go Kawamura²⁾, Hiroyuki Muto^1,2), Atsunori Matsuda^1,2)

1) Department of Environmental and Life Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi,Aichi 441-8580, Japan
2) Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka,Tempaku-cho, Toyohashi, Aichi 441-8580, Japan

Received:2012-11-05 Revised:2013-02-05 Online:2014-01-15 Published:2014-01-08
Contact: G. Kawamura
Supported by:
Grants-in-Aid for Young Scientists (Start-up) 21860045 and Young Scientists (B) 22760539 from the Japan Society for the Promotion of Science (JSPS).

Abstract

Abstract:

A SiO₂–TiO₂ template with ordered tubular mesochannels has been prepared by the sol–gel method. Au nanorods are deposited in the tubular mesochannels of the SiO₂–TiO₂ template, and the shape of Au is changed from nanorods to nanospheres by ultraviolet irradiation during thermal deposition. The photocatalytic activity of mesoporous SiO₂–TiO₂ with/without Au nanorods/nanospheres is evaluated. Deposition of Au in the mesoporous SiO₂–TiO₂ template enhances the photocatalysis of TiO₂. Interestingly, the sample containing Au nanorods exhibits higher photocatalytic activity than that with Au nanospheres. Photocatalysis by exciting surface plasmon resonance is not detected in the composite samples regardless of the shape of the deposited Au nanoparticles.

Key words: Mesoporous, Titania, Gold, Shape control, Photocatalysis, Surface plasmon resonance

Teruhisa Okuno, Go Kawamura, Hiroyuki Muto, Atsunori Matsuda. Fabrication of Shape-Controlled Au Nanoparticles in a TiO₂-Containing Mesoporous Template Using UV Irradiation and Their Shape-Dependent Photocatalysis[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.08.008.

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Fabrication of Shape-Controlled Au Nanoparticles in a TiO₂-Containing Mesoporous Template Using UV Irradiation and Their Shape-Dependent Photocatalysis

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