One-step fabrication of gold nanoparticles-silica composites with enhanced catalytic activity

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A fast and simple one-step method for the fabrication of stable gold nanoparticles-silica composites by using 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane(azacryptand) as a molecular anchor between nanoparticles and silica as well as reductant and stabilizer in the formation of the nanoparticles is reported. Gold nanoparticles-coated silica materials can be fabricated by mixing HAuCl4 aqueous solution with the aqueous mixture of azacryptand and silica materials such as submicrometer silica particles and silica gel. The prepared nanoparticles-coated silica gel can effectively catalyze reduction of 4-nitrophenol by sodium borohydride in aqueous solution. (C) 2008 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2008-02
Language
English
Article Type
Article
Keywords

AROMATIC NITRO-COMPOUNDS; SURFACE; REDUCTION; SPHERES; GEL; IMMOBILIZATION; AMINES; MATRIX; FILMS; SIZE

Citation

CHEMICAL PHYSICS LETTERS, v.453, no.1-3, pp.77 - 81

ISSN
0009-2614
DOI
10.1016/j.cplett.2008.01.017
URI
http://hdl.handle.net/10203/86602
Appears in Collection
CH-Journal Papers(저널논문)
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