Issue 3, 2011
From the journal:

Green Chemistry

Polyphenol-grafted collagen fiber as reductant and stabilizer for one-step synthesis of size-controlled gold nanoparticles and their catalytic application to 4-nitrophenol reduction†

Hao Wu,a   Xin Huang,b   Mingming Gao,b   Xuepin Liao*b  and  Bi Shi*ab  

* Corresponding authors

a National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, P. R. China
E-mail: sibitannin@vip.163.com

b Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu, P. R. China
E-mail: xpliao@scu.edu.cn
Fax: +86-28-85400356
Tel: +86-28-85400382

Abstract

A facile method for one-step synthesis of size-controlled gold nanoparticles (AuNPs) supported on collagen fiber (CF) at room temperature was proposed. Epigallocatechin-3-gallate (EGCG), a typical plant polyphenol, was grafted onto CF surface to serve as reducing/stabilizing agent, so that the AuNPs were generated on CF surface without introduction of extra chemical reagents or physical treatments. The prepared AuNPs were fully characterized, and the results showed that the dispersed AuNPs were successfully produced and the mean particle size of AuNPs could be effectively controlled in range of 18 to 5 nm simply by varying the grafting degree of EGCG on CF surface. These stabilized AuNPs were found to be active heterogeneous catalysts for the reduction of 4-nitrophenol to 4-aminophenol in aqueous phase. The catalytic behaviors of AuNPs depended on the particle size and the grafting degree of EGCG. A distinct advantage of these catalysts is that they can be easily recovered and reused at least twenty times, because of the high stability of the AuNPs supported by EGCG-grafted CF.

Graphical abstract: Polyphenol-grafted collagen fiber as reductant and stabilizer for one-step synthesis of size-controlled gold nanoparticles and their catalytic application to 4-nitrophenol reduction

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Article information

DOI
https://doi.org/10.1039/C0GC00843E
Article type
Paper
Submitted
23 Nov 2010
Accepted
20 Dec 2010
First published
31 Jan 2011

Green Chem., 2011,13, 651-658

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Polyphenol-grafted collagen fiber as reductant and stabilizer for one-step synthesis of size-controlled gold nanoparticles and their catalytic application to 4-nitrophenol reduction

H. Wu, X. Huang, M. Gao, X. Liao and B. Shi, Green Chem., 2011, 13, 651 DOI: 10.1039/C0GC00843E

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