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Journal of Nanoparticle Research

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01-06-2010 | Research Paper

Catalytic properties of gold nanoparticles immobilized on the surfaces of nanocarriers

Authors: Xi Chen, Dongyun Zhao, Yingli An, Linqi Shi, Wenchao Hou, Li Chen

Published in: Journal of Nanoparticle Research | Issue 5/2010

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Abstract

Gold nanoparticles are immobilized in the hydrophilic coronas of spherical micelle carriers for high catalytic activity. The micelle is formed by self-assembly of block copolymer, polystyrene-b-poly (acrylic acid), in basic aqueous solution (pH 10) and has a polystyrene core and a poly (acrylic acid) corona. The gold nanoparticles are anchored into the poly (acrylic acid) corona by in situ reduction of the mixture of HAuCl₄ and micelle with NaBH₄. The sizes of the gold nanoparticles can be adjusted by changing the content of the HAuCl₄. In the process of catalyzing p-nitrophenol to p-aminophenol, the reaction shows one-order kinetics, furthermore, the reaction rate increases with the concentration of composites as well as reaction temperature. Comparing the composites with polystyrene as core and poly (4-vinylpyridine)/Au as corona, the catalytic activity of the present composites is higher, which is ascribed to their hydrophilic corona structure.

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Title: Catalytic properties of gold nanoparticles immobilized on the surfaces of nanocarriers
Authors: Xi Chen
Dongyun Zhao
Yingli An
Linqi Shi
Wenchao Hou
Li Chen
Publication date: 01-06-2010
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 5/2010
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-009-9750-7

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