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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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.
|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
|Deposited On:||10 Nov 2010 04:11|
|Last Modified:||10 Nov 2010 04:11|
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