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Gold Nanoparticles Located at the Interface of Anatase/Rutile TiO2 Particles as Active Plasmonic Photocatalysts for Aerobic Oxidation

Visible-light irradiation (λ > 450 nm) of gold nanoparticles loaded on a mixture of anatase/rutile TiO2 particles (Degussa, P25) promotes efficient aerobic oxidation at room temperature. The photocatalytic activity critically depends on the catalyst architecture: Au particles with

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Published in:	Journal of the American Chemical Society 2012-04, Vol.134 (14), p.6309-6315
Main Authors:	Tsukamoto, Daijiro, Shiraishi, Yasuhiro, Sugano, Yoshitsune, Ichikawa, Satoshi, Tanaka, Shunsuke, Hirai, Takayuki
Format:	Article
Language:	English
Subjects:	Alcohols - chemistry Binding Sites Catalysis Electrons Gold - chemistry Light Metal Nanoparticles - chemistry Models, Chemical Oxygen - chemistry Photochemistry - methods Temperature Time Factors Titanium - chemistry
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container_issue	14
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container_title	Journal of the American Chemical Society
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creator	Tsukamoto, Daijiro Shiraishi, Yasuhiro Sugano, Yoshitsune Ichikawa, Satoshi Tanaka, Shunsuke Hirai, Takayuki
description	Visible-light irradiation (λ > 450 nm) of gold nanoparticles loaded on a mixture of anatase/rutile TiO2 particles (Degussa, P25) promotes efficient aerobic oxidation at room temperature. The photocatalytic activity critically depends on the catalyst architecture: Au particles with
doi_str_mv	10.1021/ja2120647
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The photocatalytic activity critically depends on the catalyst architecture: Au particles with <5 nm diameter located at the interface of anatase/rutile TiO2 particles behave as the active sites for reaction. This photocatalysis is promoted via plasmon activation of the Au particles by visible light followed by consecutive electron transfer in the Au/rutile/anatase contact site. The activated Au particles transfer their conduction electrons to rutile and then to adjacent anatase TiO2. This catalyzes the oxidation of substrates by the positively charged Au particles along with reduction of O2 by the conduction band electrons on the surface of anatase TiO2. 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Am. Chem. Soc</addtitle><description>Visible-light irradiation (λ > 450 nm) of gold nanoparticles loaded on a mixture of anatase/rutile TiO2 particles (Degussa, P25) promotes efficient aerobic oxidation at room temperature. The photocatalytic activity critically depends on the catalyst architecture: Au particles with <5 nm diameter located at the interface of anatase/rutile TiO2 particles behave as the active sites for reaction. This photocatalysis is promoted via plasmon activation of the Au particles by visible light followed by consecutive electron transfer in the Au/rutile/anatase contact site. The activated Au particles transfer their conduction electrons to rutile and then to adjacent anatase TiO2. This catalyzes the oxidation of substrates by the positively charged Au particles along with reduction of O2 by the conduction band electrons on the surface of anatase TiO2. 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Am. Chem. Soc</addtitle><date>2012-04-11</date><risdate>2012</risdate><volume>134</volume><issue>14</issue><spage>6309</spage><epage>6315</epage><pages>6309-6315</pages><issn>0002-7863</issn><eissn>1520-5126</eissn><abstract>Visible-light irradiation (λ > 450 nm) of gold nanoparticles loaded on a mixture of anatase/rutile TiO2 particles (Degussa, P25) promotes efficient aerobic oxidation at room temperature. The photocatalytic activity critically depends on the catalyst architecture: Au particles with <5 nm diameter located at the interface of anatase/rutile TiO2 particles behave as the active sites for reaction. This photocatalysis is promoted via plasmon activation of the Au particles by visible light followed by consecutive electron transfer in the Au/rutile/anatase contact site. The activated Au particles transfer their conduction electrons to rutile and then to adjacent anatase TiO2. 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subjects	Alcohols - chemistry Binding Sites Catalysis Electrons Gold - chemistry Light Metal Nanoparticles - chemistry Models, Chemical Oxygen - chemistry Photochemistry - methods Temperature Time Factors Titanium - chemistry
title	Gold Nanoparticles Located at the Interface of Anatase/Rutile TiO2 Particles as Active Plasmonic Photocatalysts for Aerobic Oxidation
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