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Preparation of well-dispersed and anti-oxidized Ni nanoparticles using polyamioloamine dendrimers as templates and their catalytic activity in the hydrogenation of p-nitrophenol to p-aminophenol.
- Source :
- Korean Journal of Chemical Engineering; Mar2011, Vol. 28 Issue 3, p717-722, 6p
- Publication Year :
- 2011
-
Abstract
- p-Aminophenol was synthesized by catalytic hydrogenation of p-nitrophenol on Ni nanoparticles prepared by a chemical reduction method using polyamidoamine (PAMAM) dendrimers as templates. The as-prepared Ni nanoparticles were characterized by XRD, LRS, EDS, FTIR, FESEM, HRTEM and N sorption analysis. Smaller-sized, better-dispersed and more active Ni nanoparticles can be successfully achieved using PAMAM dendrimers as templates. Analysis results show the as-prepared Ni nanoparticles are pure f.c.c. nickel. In hydrogenation reactions of p-nitrophenol, Ni nanoparticles show higher catalytic activity than that of Ni nanoparticles prepared in the absence of PAMAM dendrimers. The weight ratio of PAMAM/Ni is proved to be an important parameter on the catalytic activity of Ni nanoparticles and the optimal ratio is 15%. The reason proposed for higher catalytic activity of Ni nanoparticles is a combination effect of smaller particle size, better dispersion and more active Ni nanoparticles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02561115
- Volume :
- 28
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Korean Journal of Chemical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 59259468
- Full Text :
- https://doi.org/10.1007/s11814-010-0424-z