Solvent-induced improvement of Au photo-deposition and resulting photo-catalytic efficiency of Au/TiO2

Metal nanoparticle photo-deposition on TiO2 enhances the semiconductor catalytic activity. We show for the first time that strong adsorption of simple diol-molecules improves the photo-deposition, by introducing a TiO2 midgap state and blocking active sites. The resulting photo-deposited gold nanopa...

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Bibliographic Details
Published in:RSC advances 2016-01, Vol.6 (100), p.97464-97468
Main Authors: Kenens, Bart, Chamtouri, Maha, Aubert, Remko, Miyakawa, Kana, Hayasaka, Yasufumi, Naiki, Hiroyuki, Watanabe, Hiroki, Inose, Tomoko, Fujita, Yasuhiko, Lu, Gang, Masuhara, Akito, Uji-i, Hiroshi
Format: Article
Language:English
Subjects:
Efficiency
Ethanol
Ethyl alcohol
Gold
Nanoparticles
Semiconductors
Solvents
Titanium dioxide
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Summary:Metal nanoparticle photo-deposition on TiO2 enhances the semiconductor catalytic activity. We show for the first time that strong adsorption of simple diol-molecules improves the photo-deposition, by introducing a TiO2 midgap state and blocking active sites. The resulting photo-deposited gold nanoparticles are mono-dispersed and well-distributed over the TiO2 particles. The photo-catalytic activity of the Au/TiO2 systems obtained in ethyleneglycol was significantly enhanced compared to those prepared in conventional solvents, such as water and ethanol.
ISSN:2046-2069
DOI:10.1039/c6ra19372b