One-Pot Green Synthesis of Graphene Nanosheets Encapsulated Gold Nanoparticles for Sensitive and Selective Detection of Dopamine

被引：69

作者：

Thirumalraj, Balamurugan ^{[1
]}

Rajkumar, Chellakannu ^{[1
]}

Chen, Shen-Ming ^{[1
]}

Palanisamy, Selvakumar ^{[1
]}

机构：

[1] Natl Taipei Univ Technol, Dept Chem Engn & Biotechnol, Taipei 106, Taiwan

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

DISPERSED CARBON NANOTUBES; PEROXIDASE-LIKE CATALYSIS; ASCORBIC-ACID; ELECTROCHEMICAL DETECTION; MODIFIED ELECTRODE; GALLIC ACID; URIC-ACID; OXIDE; NANOCOMPOSITE; ELECTROCATALYSIS;

D O I：

10.1038/srep41213

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report a simple new approach for green preparation of gallic acid supported reduced graphene oxide encapsulated gold nanoparticles (GA-RGO/AuNPs) via one-pot hydrothermal method. The as-prepared composites were successfully characterized by using Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray powder diffraction techniques (XRD), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM) and elemental analysis. The GA-RGO/AuNPs modified electrode behaves as a hybrid electrode material for sensitive and selective detection of dopamine (DA) in presence of ascorbic acid (AA) and uric acid (UA). The GA-RGO/AuNPs modified electrode displays an excellent electrocatalytic activity towards the oxidation of DA and exhibits a wide linear response range over the DA concentrations from 0.01-100.3 mu M with a detection limit (LOD) of 2.6 nM based on S/N = 3. In addition, the proposed sensor could be applied for the determination of DA in human serum and urine samples for practical analysis.

引用

页数：11

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