XAFS study on a photodeposition process of Pt nanoparticles on TiO2 photocatalyst

A photodeposition process of Pt metal particles on anatase TiO2 in the aqueous solution of H2PtCl6 (precursor) and methanol (reductant) was studied using transmission electron microscopy, UV-vis spectroscopy and X-ray absorption fine structure spectroscopy. These analyses proposed the photodepositio...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-01, Vol.712 (1)
Main Authors: Yoshida, T., Minoura, Y., Nakano, Y., Yamamoto, M., Yagi, S., Yoshida, H.
Format: Article
Language:English
Subjects:
Anatase
Aqueous solutions
Fine structure
Gold
Metal particles
Nanoparticles
Particle physics
Physics
Reducing agents
Spectrum analysis
Titanium dioxide
X ray absorption
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Summary:A photodeposition process of Pt metal particles on anatase TiO2 in the aqueous solution of H2PtCl6 (precursor) and methanol (reductant) was studied using transmission electron microscopy, UV-vis spectroscopy and X-ray absorption fine structure spectroscopy. These analyses proposed the photodeposition mechanism of Pt on TiO2 by the photogenerated electrons: the photo-assisted adsorption of Pt4+ complexes on TiO2 through the ligand exchange at the initial stage, followed by the successive rapid reduction of Pt4+ to Pt0 to grow the Pt metal particles, which gives small and almost uniform size of Pt metal nanoparticles.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/712/1/012076