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• W2145752783 endingPage "2065" @default.
• W2145752783 startingPage "2060" @default.
• W2145752783 abstract "Au−TiO2 snowman-like heterodimer nanoparticles were prepared by a surface sol−gel process based on gold Janus nanoparticles whose surface-protecting monolayers consisted of a hemisphere of hydrophobic 1-hexanethiolates and the other of hydrophilic 2-(2-mercaptoethoxy)ethanol. Transmission electron microscopic measurements showed that the resulting TiO2 nanoparticles (diameter 6 nm) exhibited well-defined lattice fringes that were consistent with the (101) diffraction planes of anatase TiO2. The heterodimer nanoparticles displayed apparent photoluminescence that was ascribed to electronic transitions involving trap states of TiO2 particles, and the photocatalytic activity was manifested by the oxidative conversion of methanol into formaldehyde, which was detected quantitatively by the Nash method. The enhanced photocatalytic performance, as compared to that of the TiO2 nanoparticles alone, was ascribed to the charge separation of photogenerated electrons and holes at the Au−TiO2 interface that was facilitated by the close proximity of the gold nanoparticles. These results suggested that (i) there were at least two possible pathways for photogenerated electrons at the TiO2 conduction band, decay to the trap states and transfer to the gold nanoparticles, and (ii) energy/electron transfer from the trap states to gold nanoparticles was less efficient. In essence, this study showed that the snowman-like heterodimers might be exploited as a homogeneous photocatalytic system for the preparation of functional molecules and materials." @default.
• W2145752783 created "2016-06-24" @default.
• W2145752783 creator A5002654282 @default.
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• W2145752783 date "2009-08-17" @default.
• W2145752783 modified "2023-09-30" @default.
• W2145752783 title "Janus Nanostructures Based on Au−TiO₂ Heterodimers and Their Photocatalytic Activity in the Oxidation of Methanol" @default.
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• W2145752783 doi "https://doi.org/10.1021/am900425v" @default.
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• W2145752783 hasPublicationYear "2009" @default.
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