Cost-Effective Three-Dimensional Graphene/Ag Aerogel Composite for High-Performance Sensing. (1st July 2016)

• Record Type: Journal Article
• Authors: Lou, Xianghong; Zhu, Chengling; Pan, Hui; Ma, Jun; Zhu, Shenmin; Zhang, Di; Jiang, Xueliang
• Is Part Of: Electrochimica acta. Volume 205(2016)
• Page Start: 70
• Page End: 76
• Publication Date: 2016-07-01
• Subjects: Three-dimensional structures -- Graphene -- Silver nanoparticles -- H2O2 sensor; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.04.102
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A cost-effective new approach was developed for the fabrication of a three-dimensional reduced graphene oxide/Ag nanoparticle composite, where Ag nanoparticles of 18.0 ± 1.8 nm in diameter were uniformly dispersed throughout a reduced graphene oxide aerogel. When used as a non-enzymatic sensor, the composite demonstrated excellent electrocatalytic performance toward the detection of H2 O2, i.e. a broad linear range of 0.016–27 mmol L −1, high sensitivity of 419.7 μA mmol −1 L cm −2, low detection limit of 6.8 μmol L −1 and superior selectivity against impurities such as citric acid, ascorbic acid and glucose. The superior performance is ascribed to the large interfacial area provided by the three-dimensional aerogel and the enhanced electron transfer by a great number of the fine Ag nanopaticles uniformly dispersed throughout the aerogel.