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Formation and catalytic activity of spherical composites with surfaces coated with gold nanoparticles
- Source :
- Journal of Colloid and Interface Science. 322:414-420
- Publication Year :
- 2008
- Publisher :
- Elsevier BV, 2008.
-
Abstract
- Micelle-supported gold composites with a polystyrene core and a poly(4-vinyl pyridine)/Au shell are synthesized using NaBH 4 to reduce a mixture of micelle and HAuCl 4 in acidic aqueous solution (pH ∼2). The template micelle with a polystyrene core and a poly(4-vinyl pyridine) shell is formed by self-assembly of block copolymer polystyrene- block -poly(4-vinyl pyridine). The gold nanoparticles coated onto the surfaces of the composites possess an average diameter of about 15 nm. The composites are applied to catalyze the reduction of p -nitrophenol in the presence of NaBH 4 , and the results indicate that the kinetic constant of the reaction increases when the composite concentration and the reaction temperature increase. In addition, research results also indicate that composites with high content of gold show higher catalytic activity and higher catalytic efficiency.
- Subjects :
- Magnetic Resonance Spectroscopy
Materials science
Metal Nanoparticles
Nanoparticle
Micelle
Catalysis
Nitrophenols
Biomaterials
chemistry.chemical_compound
Nitrophenol
Colloid and Surface Chemistry
Coated Materials, Biocompatible
Copolymer
Composite material
Micelles
Aqueous solution
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry
Colloidal gold
Polystyrenes
Polyvinyls
Gold
Polystyrene
Oxidation-Reduction
Subjects
Details
- ISSN :
- 00219797
- Volume :
- 322
- Database :
- OpenAIRE
- Journal :
- Journal of Colloid and Interface Science
- Accession number :
- edsair.doi.dedup.....99770359fe08d969f10b2f915c68557b