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Oriented immobilization of Au nanoparticles on C@P4VP core–shell microspheres and their catalytic performance.
- Source :
-
New Journal of Chemistry . Apr2015, Vol. 39 Issue 4, p2949-2955. 7p. - Publication Year :
- 2015
-
Abstract
- Core–shell C@poly(4-vinylpyridine) (C@P4VP) microspheres immobilized with small and uniform Au nanoparticles were designed and fabricated. Firstly, the C@P4VP support was obtained by coating a poly(4-vinylpyridine) shell on the carbon spheres through the hydrogen-bond interaction between –COOH of carbon spheres and pyridine of 4-vinylpyridine. Then Au nanoparticles were synthesized by in situ adsorption and reduction of HAuCl4 in the P4VP chains of the C@P4VP microspheres. Carbon spheres can serve as hard templates and prevent the polymeric P4VP shell from excessive deformation. The coordination between cross-linked networks of P4VP chains and the embedded Au nanoparticles effectively inhibit the aggregation and leaching of noble metal nanoparticles from the support. The resulting C@P4VP–Au microspheres showed excellent catalytic performance and high cyclic stability in the aqueous reduction of 4-nitrophenol by NaBH4. Moreover, optimal activities were observed for the P4VP shell with a low cross-linked degree and a reaction system with a low pH value. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 39
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 101885227
- Full Text :
- https://doi.org/10.1039/c4nj02112f