Dopamine sensor based on a glassy carbon electrode modified with a reduced graphene oxide and palladium nanoparticles composite

被引：183
|
作者：
Palanisamy, Selvakumar [1 ]
Ku, Shuhao [1 ]
Chen, Shen-Ming [1 ]
机构：
[1] Natl Taipei Univ Technol, Dept Chem Engn & Biotechnol, Electroanal & Bioelectrochem Lab, Taipei 106, Taiwan
来源：
MICROCHIMICA ACTA | 2013年 / 180卷 / 11-12期
关键词：
Reduced graphene oxide; Palladium nanoparticles; Dopamine; Electrochemical oxidation; Sensor; SELECTIVE DETECTION; VOLTAMMETRIC DETERMINATION; NANOCOMPOSITE; ELECTROCATALYSIS; FILM;
D O I：
10.1007/s00604-013-1028-1
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report on a sensitive electrochemical sensor for dopamine (DA) based on a glassy carbon electrode that was modified with a nanocomposite containing electrochemically reduced graphene oxide (RGO) and palladium nanoparticles (Pd-NPs). The composite was characterized by scanning electron microscopy, energy dispersive spectroscopy, and electrochemical impendence spectroscopy. The electrode can oxidize DA at lower potential (234 mV vs Ag/AgCl) than electrodes modified with RGO or Pd-NPs only. The response of the sensor to DA is linear in the 1-150 mu M concentration range, and the detection limit is 0.233 mu M. The sensor was applied to the determination of DA in commercial DA injection solutions.
引用
收藏
页码：1037 / 1042
页数：6
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