Facile Electrochemical Sensor for Nanomolar Rutin Detection Based on Magnetite Nanoparticles and Reduced Graphene Oxide Decorated Electrode

He, Quanguo; Wu, Yiyong; Tian, Yaling; Li, Guangli; Li, Jun; Deng, Peihong; Chen, Dongchu

doi:10.3390/nano9010115

Cited by 112 publications

(46 citation statements)

References 43 publications

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“…TiO 2 NPs can be easily anchored on the surface of metal electrodes [43], but immobilizing them directly on the surface of glass carbon electrodes (GCE) is difficult. Due to their unique properties such as their large surface to-volume ratio, extraordinary electrical conductivity, and rapid electron transfer rate [44][45][46][47][48], graphene (Gr) has been considered as the most preferred electrode material for electrochemical sensors. Its unique 2D crystal structure and electronic property endows itself an ideal catalyst support for the anchoring of metal or metal oxide NPs [49], which offers versatile selective catalytic or sensing properties.…”

Section: Introductionmentioning

confidence: 99%

Titania/Electro-Reduced Graphene Oxide Nanohybrid as an Efficient Electrochemical Sensor for the Determination of Allura Red

Jin

et al. 2020

Nanomaterials

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Titania/electro-reduced graphene oxide nanohybrids (TiO2/ErGO) were synthesized by the hydrolysis of titanium sulfate in graphene oxide suspension and in situ electrochemical reduction. It provides a facile and efficient method to obtain nanohybrids with TiO2 nanoparticles (TiO2 NPs) uniformly coated by graphene nanoflakes. TiO2/ErGO nanohybrids were characterized by transmission electron microscopy, X-ray diffraction, cyclic voltammogram, and electrochemical impedance spectroscopy in detail. Compared with pure ErGO and TiO2 NPs, TiO2/ErGO nanohybrids greatly enhanced the electrocatalytic activity and voltammetric response of Allura Red. In the concentration range of 0.5–5.0 μM, the anodic peak currents of Allura Red were linearly correlated to their concentrations. However, the linear relationship was changed to the semi-logarithmic relationship at a higher concentration region (5.0–800 μM). The detection limit (LOD) was 0.05 μM at a signal-to-noise ratio of 3. The superior sensing performances of the proposed sensor can be ascribed to the synergistic effect between TiO2 NPs and ErGO, which provides a favorable microenvironment for the electrochemical oxidation of Allura Red. The proposed TiO2/ErGO/GCE showed good reproducibility and stability both in determination and in storage, and it can accurately detect the concentration of Allura Red in milk drinks, providing an efficient platform for the sensitive determination of Allura Red with high reliability, simplicity, and rapidness.

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Section: Introductionmentioning

confidence: 99%

Titania/Electro-Reduced Graphene Oxide Nanohybrid as an Efficient Electrochemical Sensor for the Determination of Allura Red

Jin

et al. 2020

Nanomaterials

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“…Since the experimental discovery of monolayer by Novoselov and Geim [21], GR has attracted much attention due to its unique properties. The applications of GR or GR-based nanocomposites in high sensitivity and high selectivity electrochemical sensors have been widely reported, such as dopamine [22][23][24], 4-nitrophenol [25], rutin [26], tryptophan [27], sunset yellow [28], quinoline yellow [29], glucose [30], serotonin [31], acetaminophen [32], 4-aminophenol [33] and methyl parathion [34] sensors. Although GR has significant electrocatalytic and sensing properties, it has been reported that in most solvents, due to van der Waals interaction and strong π-π stacking, GR nanosheets are clustered together in a short time [35].…”

Section: Introductionmentioning

confidence: 99%

Sensitive Voltammetric Sensor for Tryptophan Detection by Using Polyvinylpyrrolidone Functionalized Graphene/GCE

Liu

Feng

et al. 2020

Nanomaterials

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In this paper, an electrochemical method for the measurement of tryptophan (Trp) was developed based on a glassy carbon electrode modified with polyvinylpyrrolidonefunctionalized graphene (PVP-GR)/glassy carbon electrode (GCE). In 0.1 M phosphate buffer solution (PBS, pH = 2.2), compared with bare GCE, PVP/GCE, and GR/GCE, the oxidation peak current of Trp increased dramatically at PVP-GR/GCE. The oxidation mechanism of Trp on the PVP-GR/GCE was discussed and the experimental conditions were optimized. Under the best experimental conditions, the oxidation peak current of Trp was proportional to its concentration in the range of 0.06 µM–10.0 µM and 10.0–100.0 µM, and the limit of detection (LOD) was 0.01 µM (S/N = 3). The target modified electrode with excellent repeatability, stability and selectivity, was successfully applied to detectTrp in drugs and biological samples.

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“…The effect of interferences on sensor's performance and recovery ratio of target analyte were also investigated [56,57]. A fixed concentration of 10 copies/ml WSSV was mixed with different matrixes and then similarly detected by the sensor electrode.…”

Section: Detection Of Wssvmentioning

confidence: 99%

Electrochemical detection of white spot syndrome virus with a silicone rubber disposable electrode composed of graphene quantum dots and gold nanoparticle-embedded polyaniline nanowires

Takemura

Satoh²,

Boonyakida

et al. 2020

Preprint

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Background: With the enormous increment of globalization and global warming, it is expected that the number of newly evolved infectious diseases will continue to increase. To prevent damage due to these infections, the development of a diagnostic method for detecting a virus with high sensitivity in a short time is highly desired. In this study, we have developed a high-sensitivity and high-accuracy disposable electrode and evaluated it for several target viruses. Results: Conductive silicon rubber (CSR) was used to fabricate a disposable sensing matrix composed of nitrogen and sulfur-codoped graphene quantum dots (N,S-GQDs) and a gold-polyaniline nanocomposite (AuNP-PAni). A specific anti-white spot syndrome virus (WSSV) antibody was conjugated to the surface of this nanocomposite, which wassuccessfully applied for the detection of WSSV over a wide linear range of 1.45 × 10 2 to 1.45 × 10⁵ DNA copies/ml, with a detection limit as low as 48.4 DNA copies/ml. Conclusion: The engineered sensor electrode can retain the detection activity for up to 5 weeks, a vital long-term stability requirement for disposable sensing applications. This is the first demonstration of the detection of WSSV by ananofabricated sensing electrode with high sensitivity, selectivity, and stability, providing a potential diagnostic tool to monitor WSSV in the aquaculture industry.

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Facile Electrochemical Sensor for Nanomolar Rutin Detection Based on Magnetite Nanoparticles and Reduced Graphene Oxide Decorated Electrode

Cited by 112 publications

References 43 publications

Titania/Electro-Reduced Graphene Oxide Nanohybrid as an Efficient Electrochemical Sensor for the Determination of Allura Red

Titania/Electro-Reduced Graphene Oxide Nanohybrid as an Efficient Electrochemical Sensor for the Determination of Allura Red

Sensitive Voltammetric Sensor for Tryptophan Detection by Using Polyvinylpyrrolidone Functionalized Graphene/GCE

Electrochemical detection of white spot syndrome virus with a silicone rubber disposable electrode composed of graphene quantum dots and gold nanoparticle-embedded polyaniline nanowires

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