One-pot synthesis of Au-Cu2O/rGO nanocomposite based electrochemical sensor for selective and simultaneous detection of dopamine and uric acid

Aparna, T.K.; Sivasubramanian, R.; Dar, Mushtaq Ahmad

doi:10.1016/j.jallcom.2018.01.205

Cited by 188 publications

(39 citation statements)

References 50 publications

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“…The analytical performances were compared to those in previous works (Table 1). Obviously, the sensing parameters of the proposed sensor are comparable to, or even better than, previously reported modified electrodes [7,46,47,48,49,50,51,52,53,54].…”

Section: Resultssupporting

confidence: 74%

“…As another critical biomolecule in human body, UA is commonly regarded as the metabolic product of purine [6]. Generally, the UA level is 4.1 ± 8.8 mg/100 mL for a healthy individual [7]. The abnormal concentration of UA in physiological fluids likely leads to several disorders including pneumonia, hyperuricemia, and gout [8].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, DA and UA are highly electroactive biomolecules, which are more suitable for electrochemical detection. However, bare electrodes often suffer from electrode fouling and cross-interference issues, which result in poor sensitivity and reproducibility [7,21]. To address the issues, various nanomaterials were developed to construct electrochemical sensors.…”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of MnO2 Nanoflowers/N-Doped Reduced Graphene Oxide Composite and Its Application for Simultaneous Determination of Dopamine and Uric Acid

et al. 2019

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This study reports facile synthesis of MnO2 nanoflowers/N-doped reduced graphene oxide (MnO2NFs/NrGO) composite and its application on the simultaneous determination of dopamine (DA) and uric acid (UA). The microstructures, morphologies, and electrochemical performances of MnO2NFs/NrGO were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS), respectively. The electrochemical experiments showed that the MnO2NFs/NrGO composites have the largest effective electroactive area and lowest charge transfer resistance. MnO2NFs/NrGO nanocomposites displayed superior catalytic capacity toward the electro-oxidation of DA and UA due to the synergistic effect from MnO2NFs and NrGO. The anodic peak currents of DA and UA increase linearly with their concentrations varying from 0.2 μM to 6.0 μM. However, the anodic peak currents of DA and UA are highly correlated to the Napierian logarithm of their concentrations ranging from 6.0 μM to 100 μM. The detection limits are 0.036 μM and 0.029 μM for DA and UA, respectively. Furthermore, the DA and UA levels of human serum samples were accurately detected by the proposed sensor. Combining with prominent advantages such as facile preparation, good sensitivity, and high selectivity, the proposed MnO2NFs/NrGO nanocomposites have become the most promising candidates for the simultaneous determination of DA and UA from various actual samples.

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Section: Resultssupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of MnO2 Nanoflowers/N-Doped Reduced Graphene Oxide Composite and Its Application for Simultaneous Determination of Dopamine and Uric Acid

et al. 2019

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“…The anodic peak current increases linearly with the increasing concentration of UA with a correlation co-efficient of R 2 = 0.9987. Table 2 shows the electroanalytical parameters of the γ-Fe 2 O 3 nanobelts/GCE based DA sensor were compared with other modified electrodes [56][57][58][59][60][61][62][63][64]. It can be seen that the γ-Fe 2 O 3 nanobelts/GCE exhibited wider linear range and lower detection limit in comparison with other electrochemical sensing platforms.…”

Section: Effect Of Ua Concentration On the γ-Fe2o3 Nanobelts/gcementioning

confidence: 99%

Sol-Gel Mediated Greener Synthesis of γ-Fe2O3 Nanostructures for the Selective and Sensitive Determination of Uric Acid and Dopamine

2018

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Novel eco-freindly benign morphology-controlled biosynthesis of acicular iron oxide (γ-Fe2O3) nanostructures with various shapes and sizes have been synthesized through greener surfactant, Aloe vera (AV) extract assisted sol-gel method. By simply varying the experimental parameters, pure phase of cubic spinel superparamagnetic γ-Fe2O3 nanospherical aggregates, nanobelts and nanodots have been developed. The synthesized γ-Fe2O3 nanostructures are characterized through X-Ray Diffractommetry (XRD), X-Ray Photoelectron Spectroscopy (XPS), Fourier Transform-Infrared Spectrsocopy (FT-IR), Field Emission-Scanning Electron Microscopy (FE-SEM), Transmission Electron Microscopy (TEM) and Vibrating Sample Magnetometer (VSM). Moreover, the electrochemical determination of uric acid (UA) and dopamine (DA) of the as obtained γ-Fe2O3 nanostructures are systematically demonstrated. The electrochemical properties of the γ-Fe2O3 nanostructures modified glassy carbon electrode (GCE) displayed an excellent sensing capability for the determination of DA and UA, simultaneously than the bare GCE. When compared with the other iron oxide nanostructures, γ-Fe2O3 nanobelts/GCE exhibited remarkable oxidation current response towards the biomolecules. This occurred due to the high surface area and the unique one-dimensional nanostructure of γ-Fe2O3 nanobelts. Ultimately, the greener synthesis protocol explored in this research work may also be expanded for the preparation of other morphology controlled magnetic and non-magnetic nanomaterials, which could easily open up innovative potential avenues for the development of practical biosensors.

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“…PTCA-RGO-MWCNTsÀ Au NPs/ GCE 1-100 0.124 μA mM À 1 0.07 [44] Gold nanosheets/ GCE 2-298 7 μA mM À 1 0.28 [45] Au-Cu 2 O/rGO/GCE 10-90 -3.9 [46] Au@ZIF-8/GCE 0.1-50 6.452μA mM À 1 cm À 2 0.01 [47] K 2 Fe 4 O 7 /GCE 1-40, 40-140 0.22 [48] Fe 2 NiMIL-88B/GCE 1.2-1800…”

Section: Anti-interference Reproducibility and Stability Studymentioning

confidence: 99%

Preparation of a Hollow Nanocomposite with Gold‐Embedded Zeolitic Imidazolate Framework‐67 for the Electrochemical Determination of Dopamine

Dong

Zheng

2020

ChemElectroChem

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This work employed a polystyrene sphere as a template to synthesize a hollow nanocomposite with gold-embedded zeolitic imidazolate framework-67 (H-Au@ZIF-67). The morphological and structural characteristics of the prepared composite were investigated by using scanning electron microscopy, transmission electron microscopy, X-ray diffraction and energydisperse spectroscopy, indicating that H-Au@ZIF-67 with a sunflower-shaped cross section was successfully prepared. The synthesized H-Au@ZIF-67 was used to construct a dopamine electrochemical sensor, which showed good linearity scope of 0.25-438.75 μM with a high sensitivity of 332.1 μA mM À 1 cm À 2 and low detection limit of 0.04 μM. These results showed that the H-Au@ZIF-67 can be a good electrode modification material for dopamine sensing.

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One-pot synthesis of Au-Cu2O/rGO nanocomposite based electrochemical sensor for selective and simultaneous detection of dopamine and uric acid

Cited by 188 publications

References 50 publications

Facile Synthesis of MnO2 Nanoflowers/N-Doped Reduced Graphene Oxide Composite and Its Application for Simultaneous Determination of Dopamine and Uric Acid

Facile Synthesis of MnO2 Nanoflowers/N-Doped Reduced Graphene Oxide Composite and Its Application for Simultaneous Determination of Dopamine and Uric Acid

Sol-Gel Mediated Greener Synthesis of γ-Fe2O3 Nanostructures for the Selective and Sensitive Determination of Uric Acid and Dopamine

Preparation of a Hollow Nanocomposite with Gold‐Embedded Zeolitic Imidazolate Framework‐67 for the Electrochemical Determination of Dopamine

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