Effect of ligand structure on the catalytic activity of Au nanocrystals

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The surface coating-dependent catalytic activity of icosahedral Au nanoparticles (IAuNPs) for the reduction of 4-nitrophenol by NaBH(4) in aqueous solution was investigated. Cetyltrimethylammonium bromide (CTAB)-stabilized IAuNPs with average size of 50 nm were prepared by three-step seeding protocol. The CTAB was then exchanged with several amine derivatives such as pyrrole, pyridine, 2,2'-bipyridine, and 4,4'-bipyridine. The catalytic reaction rates of nanoparticles are in the order of IAuNPs@4,4'-bpy > IAuNP5@2,2'-bpy > IAuNPs@pyridine > IAuNPs@pyrrole > IAuNPs@CTAB, revealing that the catalytic activity of the nanoparticles highly depends on the type and structure of the ligand molecules. (C) 2010 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2010-12
Language
English
Article Type
Article
Citation

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.372, no.1-3, pp.146 - 150

ISSN
0927-7757
DOI
10.1016/j.colsurfa.2010.10.019
URI
http://hdl.handle.net/10203/98624
Appears in Collection
CH-Journal Papers(저널논문)
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