A dopamine electrochemical sensor based on a platinum-silver graphene nanocomposite modified electrode

被引：121
作者：
Anuar, Nadzirah Sofia [1 ]
Basirun, Wan Jeffrey [1 ,2 ]
Shalauddin, Md [1 ,2 ]
Akhter, Shamima [1 ]
机构：
[1] Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia
[2] Univ Malaya, Inst Nanotechnol & Catalysis NanoCat, Kuala Lumpur 50603, Malaysia
来源：
RSC ADVANCES | 2020年 / 10卷 / 29期
关键词：
GLASSY-CARBON ELECTRODE; ONE-POT SYNTHESIS; DOPED GRAPHENE; ASCORBIC-ACID; SENSITIVE DETECTION; URIC-ACID; GOLD NANOPARTICLES; OXIDE; PERFORMANCE; FABRICATION;
D O I：
10.1039/c9ra11056a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：17336 / 17344
页数：9
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