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Catalytic properties of gold nanoparticles immobilized on the surfaces of nanocarriers.
- Source :
- Journal of Nanoparticle Research; Jun2010, Vol. 12 Issue 5, p1877-1887, 11p, 1 Black and White Photograph, 1 Diagram, 6 Graphs
- Publication Year :
- 2010
-
Abstract
- Gold nanoparticles are immobilized in the hydrophilic coronas of spherical micelle carriers for high catalytic activity. The micelle is formed by self-assembly of block copolymer, polystyrene- b-poly (acrylic acid), in basic aqueous solution (pH 10) and has a polystyrene core and a poly (acrylic acid) corona. The gold nanoparticles are anchored into the poly (acrylic acid) corona by in situ reduction of the mixture of HAuCl<subscript>4</subscript> and micelle with NaBH<subscript>4</subscript>. The sizes of the gold nanoparticles can be adjusted by changing the content of the HAuCl<subscript>4</subscript>. In the process of catalyzing p-nitrophenol to p-aminophenol, the reaction shows one-order kinetics, furthermore, the reaction rate increases with the concentration of composites as well as reaction temperature. Comparing the composites with polystyrene as core and poly (4-vinylpyridine)/Au as corona, the catalytic activity of the present composites is higher, which is ascribed to their hydrophilic corona structure. [ABSTRACT FROM AUTHOR]
- Subjects :
- GOLD
NANOPARTICLES
MICELLES
ACRYLIC acid
NANOCOMPOSITE materials
POLYSTYRENE
Subjects
Details
- Language :
- English
- ISSN :
- 13880764
- Volume :
- 12
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Journal of Nanoparticle Research
- Publication Type :
- Academic Journal
- Accession number :
- 50791934
- Full Text :
- https://doi.org/10.1007/s11051-009-9750-7