One-step synthesis of graphene/Au nanoparticle composite by epoxy resin: electrocatalytic detection of H2O2 and catalytic reduction of 4-nitrophenol
Authors:
- 1 October 2017
- journal article
- research article
- Published by IOP Publishing in Materials Research Express
- Vol. 4 (10) , 105012
Abstract
In the present work, graphene/gold nanoparticle (AuNP) composites were synthesized via a one-step and green method using modified epoxy resin E-44 (AB-EP-44)—a phenolic—as both stabilizer and reductant in aqueous solution. The as-prepared samples were further characterized by ultraviolet–visible (UV–Vis) absorption spectra, transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS), proving the successful synthesis of graphene/AuNP composites, and that the small AuNPs with an average diameter of ~3 nm were uniformly dispersed on graphene sheets. The composites exhibited excellent electrochemical activity towards reduction of H2O2 with a good linear response from 0–130 µM and a high sensitivity of 0.283 µA µM−1 cm−2; in addition, a detection limit of ~0.45 µM (the signal/noise:3) was achieved by using a graphene/AuNP sensor. Furthermore, the graphene/AuNP composites showed highly catalytic activity toward 4-nitrophenol (4-NP) reduction. The present green and simple synthesis approach also could be used to prepare other metal/graphene nanomaterials.Keywords
Funding Information
- National Natural Science Foundation of China (61376020, 61574021, 61604017)
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