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Nanomaterials 2017, 7(2), 40; doi:10.3390/nano7020040

Ag Nanoparticles‐Modified 3D Graphene Foam for Binder‐Free Electrodes of Electrochemical Sensors

1
Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China
2
Nanotechnology Department, Helmholtz Association, Hamburg 21502, Germany
*
Authors to whom correspondence should be addressed.
Received: 20 December 2016 / Accepted: 25 January 2017 / Published: 16 February 2017
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Abstract

Ag nanoparticles‐modified 3D graphene foam was synthesized through a one‐step in‐situ approach and then directly applied as the electrode of an electrochemical sensor. The composite foam electrode exhibited electrocatalytic activity towards Hg(II) oxidation with high limit of detection and sensitivity of 0.11 μM and 8.0 μA/μM, respectively. Moreover, the composite foam electrode for the sensor exhibited high cycling stability, long‐term durability and reproducibility. These results were attributed to the unique porous structure of the composite foam electrode, which enabled the surface of Ag nanoparticles modified reduced graphene oxide (Ag NPs modified rGO) foam to become highly accessible to the metal ion and provided more void volume for the reaction with metal ion. This work not only proved that the composite foam has great potential application in heavy metal ions sensors, but also provided a facile method of gram scale synthesis 3D electrode materials based on rGO foam and other electrical active materials for various applications. View Full-Text
Keywords: in‐situ approach; Ag nanoparticles; rGO foam; electrochemical detection; heavy metal  ion in‐situ approach; Ag nanoparticles; rGO foam; electrochemical detection; heavy metal  ion
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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. (CC BY 4.0).

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Han, T.; Jin, J.; Wang, C.; Sun, Y.; Zhang, Y.; Liu, Y. Ag Nanoparticles‐Modified 3D Graphene Foam for Binder‐Free Electrodes of Electrochemical Sensors. Nanomaterials 2017, 7, 40.

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