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Issue 26, 2012
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Size dependent catalysis with CTAB-stabilized gold nanoparticles

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Abstract

CTAB-stabilized gold nanoparticles were synthesized by applying the seeding-growth approach in order to gain information about the size dependence of the catalytic reduction of p-nitrophenol to p-aminophenol with sodium borohydride. Five different colloidal solutions of stabilized gold nanoparticles have been characterized by TEM, AFM, UV-Vis, SAXS, and DLS for their particle size distributions. Gold nanoparticles (mean sizes: 3.5, 10, 13, 28, 56 nm diameter) were tested for their catalytic efficiency. Kinetic data were acquired by UV-Vis spectroscopy at different temperatures between 25 and 45 °C. By studying the p-nitrophenol to p-aminophenol reaction kinetics we determined the nanoparticle size which is needed to gain the fastest conversion under ambient conditions in the liquid phase. Unexpectedly, CTAB-stabilized gold nanoparticles with a diameter of 13 nm are most efficient.

Graphical abstract: Size dependent catalysis with CTAB-stabilized gold nanoparticles

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Article information


Submitted
13 Mar 2012
Accepted
02 Apr 2012
First published
02 Apr 2012

Phys. Chem. Chem. Phys., 2012,14, 9343-9349
Article type
Paper

Size dependent catalysis with CTAB-stabilized gold nanoparticles

R. Fenger, E. Fertitta, H. Kirmse, A. F. Thünemann and K. Rademann, Phys. Chem. Chem. Phys., 2012, 14, 9343
DOI: 10.1039/C2CP40792B

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