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Formation mechanism of metal nanoparticles studied by XAFS spectroscopy and effective synthesis of small metal nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
55421 47052 2012 11 PDF Available
Title
Formation mechanism of metal nanoparticles studied by XAFS spectroscopy and effective synthesis of small metal nanoparticles
Abstract

Recently, we studied and developed two useful synthesis methods of metal nanoparticles. The first system is wet chemical synthesis of gold nanoparticles using fast reduction. The second one is photodeposition of metal nanoparticles on TiO2. The X-ray absorption fine structure (XAFS) study revealed their unique formation mechanisms different from the conventional mechanisms. Furthermore, we designed and synthesized new multidentate protecting ligand having sulfur functional groups to synthesize small gold nanoparticles efficiently.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (160 K)Download as PowerPoint slideHighlights► We carried out DXAFS measurement of photodeposition process of Rh on TiO2. ► Rh particles with uniform size were found to be formed on TiO2 surface at a constant rate. ► Also QXAFS measurement of formation process of Au nanoparticles in solution was carried out. ► First, nuclears consisting of four atoms were formed and then they were aggregated. ► To achieve the formation of small and uniform Au nanoparticle, we developed the tetradentate passivant.

Keywords
Metal nanoparticle; Formation mechanism; DXAFS; QXAFS; Photodeposition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 183, Issue 1, 20 March 2012, Pages 108–118
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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