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Issue 7, 2014
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The assembly of dendrimer-stabilized gold nanoparticles onto electrospun polymer nanofibers for catalytic applications

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Abstract

We report here a facile approach to assembling low generation poly(amidoamine) (PAMAM) dendrimer-stabilized gold nanoparticles (Au DSNPs) onto electrospun polymer nanofibrous mats for catalytic applications. In this study, Au DSNPs formed using amine-terminated generation 2 PAMAM dendrimers as stabilizers were assembled onto electrospun polyacrylic acid (PAA)/polyvinyl alcohol (PVA) nanofibrous mats either through electrostatic interactions or through the covalent 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) coupling reaction. The assembly of Au DSNPs with a mean diameter of 5.4 nm onto the electrospun nanofibrous mats was characterized via different techniques. The catalytic activity of the Au DSNP-assembled nanofibrous mats was evaluated by the transformation of 4-nitrophenol to 4-aminophenol. We show that both approaches enable the efficient assembly of Au DSNPs onto nanofiber surfaces and the as prepared Au DSNP-containing nanofibers formed via both approaches have excellent catalytic activity and reusability. However, the Au DSNP-assembled nanofibers via electrostatic physical interactions display a much higher catalytic activity than those formed via the chemical assembly approach. The facile dendrimer-mediated assembly approach to modifying electrospun nanofibers may be used to fabricate other composite nanofiber systems for applications in catalysis, sensing, and biomedical sciences.

Graphical abstract: The assembly of dendrimer-stabilized gold nanoparticles onto electrospun polymer nanofibers for catalytic applications

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Supplementary files

Article information


Submitted
02 Oct 2013
Accepted
19 Nov 2013
First published
20 Nov 2013

J. Mater. Chem. A, 2014,2, 2323-2332
Article type
Paper

The assembly of dendrimer-stabilized gold nanoparticles onto electrospun polymer nanofibers for catalytic applications

D. Hu, Y. Huang, H. Liu, H. Wang, S. Wang, M. Shen, M. Zhu and X. Shi, J. Mater. Chem. A, 2014, 2, 2323 DOI: 10.1039/C3TA13966B

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