期刊
RSC ADVANCES
卷 10, 期 29, 页码 17336-17344出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra11056a
关键词
-
资金
- University of Malaya under the Postgraduate Research Grant (PPP) [PG093-2015B]
A platinum-silver graphene (Pt-Ag/Gr) nanocomposite modified electrode was fabricated for the electrochemical detection of dopamine (DA). Electrochemical studies of the Pt-Ag/Gr nanocomposite towards DA detection were performed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The CV analysis showed that Pt-Ag/Gr/GCE had enhanced electrocatalytic activity towards DA oxidation due to the synergistic effects between the platinum-silver nanoparticles and graphene. The DPV results showed that the modified sensor demonstrated a linear concentration range between 0.1 and 60 mu M with a limit of detection of 0.012 mu M. The Pt-Ag/Gr/GCE presented satisfactory results for reproducibility, stability and selectivity. The prepared sensor also showed acceptable recoveries for a real sample study.
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