A novel electrochemical sensor based on self-assembled platinum nanochains - Multi-walled carbon nanotubes-graphene nanoparticles composite for simultaneous determination of dopamine and ascorbic acid

Autor: Qi Liu, Xinyu Jiang, Zhao-Ning Huang, Jingang Yu, Meng-Meng Yuan, Feipeng Jiao, Jiao Zou, Jie Teng
Rok vydání: 2019
Předmět:
Materials science
Scanning electron microscope
Dopamine
Health
Toxicology and Mutagenesis
0211 other engineering and technologies
Ascorbic Acid
Biosensing Techniques
02 engineering and technology
Carbon nanotube
010501 environmental sciences
01 natural sciences
Nanocomposites
law.invention
Microscopy
Electron
Transmission
Limit of Detection
law
Humans
High-resolution transmission electron microscopy
Electrodes
Voltammetry
Platinum
0105 earth and related environmental sciences
021110 strategic
defence & security studies
Nanocomposite
Nanotubes
Carbon
Public Health
Environmental and Occupational Health
Reproducibility of Results
Electrochemical Techniques
General Medicine
Ascorbic acid
Pollution
Electrochemical gas sensor
Microscopy
Electron
Scanning
Nanoparticles
Graphite
Differential pulse voltammetry
Nuclear chemistry
Zdroj: Ecotoxicology and Environmental Safety. 172:167-175
ISSN: 0147-6513
DOI: 10.1016/j.ecoenv.2019.01.091
Popis: In this study, platinum nanochains (PtNCs), multi-walled carbon nanotubes (MWCNTs) and graphene nanoparticles (GNPs) were assembled together to form a novel nanocomposite by a facile ultrasonic-assisted blending process. The PtNCs-MWCNTs-GNPs nanocomposite was characterized by high resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The nanocomposite was used for the modification of glass carbon electrode (GCE) and simultaneous determination of dopamine (DA) and ascorbic acid (AA) by differential pulse voltammetry (DPV) and cycle voltammetry (CV). Under the optimum conditions, the calibration curves obtained are linear for the currents versus DA and AA concentrations over the range 2.00–50.0 μM and 100–1200 μM, respectively. And the detection limits for DA and AA are 0.500 μM and 10.0 μM, respectively. The detection and quantitative analysis of DA and AA in human serum and vitamin C tablets on PtNCs-MWCNTs-GNPs/GCE gave the recoveries of 104–110% and 101–108% with relative standard deviations (RSD) of 4.36–7.48% and 0.620–2.90%, respectively. The proposed PtNCs-MWCNTs-GNPs composite could provide a new platform for the routine analysis of DA and AA in terms of its good anti-interference ability, excellent reproducibility and repeatability, and feasibility of use.
Databáze: OpenAIRE
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