Issue 102, 2016

Synthesis of catalytically active gold clusters on the surface of Fe3O4@SiO2 nanoparticles

Abstract

This work proposes a novel method to obtain catalytically active gold clusters by using the water-soluble 5,10,15,20-Tetrakis(4-trimethyl-ammonio-phenyl)porphyrin under mild conditions instead of using strong reducing agents. Uniform gold clusters were obtained with a diameter comprised between 1 and 2 nm and long-term stability. Furthermore, the water-soluble porphyrin was immobilized on the SiO2 shell of a core@shell Fe3O4@SiO2 nanoparticles to directly synthesize gold clusters onto the surface of Fe3O4@SiO2 nanoparticles featuring their magnetic recovery. Fe3O4@SiO2@Au nanoparticles were found to be catalytically active for the reduction of 4-nitrophenol to 4-aminophenol using NaBH4 and giving very high pseudo-first-order rate constant comprised between 0.7 and 2.7 min−1. Our results demonstrate that Fe3O4@SiO2@Au nanoparticles are stable catalysts and do not degrade during the catalytic process under the reaction conditions enabling their magnetic recuperation.

Graphical abstract: Synthesis of catalytically active gold clusters on the surface of Fe3O4@SiO2 nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
08 Aug 2016
Accepted
17 Oct 2016
First published
17 Oct 2016

RSC Adv., 2016,6, 100614-100622

Synthesis of catalytically active gold clusters on the surface of Fe3O4@SiO2 nanoparticles

P. Alonso-Cristobal, M. A. Lopez-Quintela, R. Contreras-Caceres, E. Lopez-Cabarcos, J. Rubio-Retama and M. Laurenti, RSC Adv., 2016, 6, 100614 DOI: 10.1039/C6RA20055A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements