Nano Archive

The preparation of Pt nanoparticles by methanol and citrate

Lin , C. S. and Khan , M. R. and Lin , S. D. (2006) The preparation of Pt nanoparticles by methanol and citrate. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 299 (2). pp. 678-685. ISSN 0021-9797

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Abstract

Platinum nanoparticles of 2-3 nun average size and ca. +/- 2 nm distribution can be successfully prepared by methanol reduction while using sodium citrate as the stabilizer. Sol formation was investigated by UV-visible spectroscopy and EXAFS (extended X-ray absorption fine structure spectroscopy). The formation of Pt nanoparticles was confirmed by the presence of Pt-Pt bonding in the solution after a certain induction period in methanol-reduced sol with or without citrate. The possible two-step reduction of Pt(IV) was revealed by correlating EXAFS, UV-visible spectra and pH data. The presence of citrate resulted in a smaller Pt-Pt coordination number and a slower sol formation process. All these results prove that citrate acted as the stabilizer in this synthesis. (c) 2006 Elsevier Inc. All rights reserved.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9730
Deposited By:JNCASR
Deposited On:20 Oct 2010 07:18
Last Modified:20 Oct 2010 07:18

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