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Journal of Nanomaterials
Volume 2017, Article ID 4130569, 8 pages
https://doi.org/10.1155/2017/4130569
Research Article

Preparation of AuNPs/GQDs/SiO2 Composite and Its Catalytic Performance in Oxidation of Veratryl Alcohol

1Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Correspondence should be addressed to Yaoyao Yang; nc.ude.tssu@gnayyy

Received 16 June 2017; Revised 12 September 2017; Accepted 18 October 2017; Published 9 November 2017

Academic Editor: Victor M. Castaño

Copyright © 2017 Yaoyao Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Composites of gold nanoparticles and graphene quantum dots (AuNPs/GQDs) exhibit excellent dispersibility in aqueous solutions. Thus, it is difficult to separate them from wet reaction systems when they are used as catalysts. To resolve this issue, in this study, an AuNPs/GQDs composite was immobilized on silicon dioxide through the hydrothermal method, which involved the formation of an amide bond between the surface GQDs of the AuNPs/GQDs composite and the amino group of the silane. The as-synthesized AuNPs/GQDs/SiO2 composite was found to be suitable for use as a heterogeneous catalyst for the oxidation of veratryl alcohol in water and exhibited catalytic activity comparable to that of bare AuNPs/GQDs as well as better recyclability.