Voltammetric determination of Sudan I in food samples based on platinum nanoparticles decorated on graphene-β-cyclodextrin modified electrode

Palanisamy, Selvakumar; Kokulnathan, Thangavelu; Chen, Shen‐Ming; Velusamy, Vijayalakshmi; Ramaraj, Sayee Kannan

doi:10.1016/j.jelechem.2017.03.041

Cited by 61 publications

(11 citation statements)

References 28 publications

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“…The Raman spectrum GR shows the two distinct characteristic peaks in 1580 and 2721 cm À1 , is resulting from the presence of G and 2D band of graphene [34,35]. The G/2D intensity ratio was 0.9, which shows the utilized GR contain few-layered GR, which is consistent with our previous report [36].…”

Section: Characterization Of Gr-b-cd/cuo Nps Compositesupporting

confidence: 91%

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Velusamy

Palanisamy

Kokulnathan

et al. 2018

Journal of Colloid and Interface Science

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Over the past decades, the synthesis of inorganic and organic nanocomposites has received much attention in the range of fields including electroanalysis of organic chemicals. In this regard, we have prepared copper oxide nanoparticle (CuO NPs) decorated graphene/β-cyclodextrin (GR-β-CD) composites using a simple electrochemical methodology, where the CuO NPs are electrodeposited on GR-β-CD composite modified electrodes. A stable GR-β-CD composite was prepared by sonication of GR in β-CD aqueous solution. As-prepared GR-β-CD/CuO NPs composites were characterized by the high-resolution scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. Cyclic voltammetry results reveal that the GR-β-CD/CuO NPs composite modified electrode exhibits an excellent catalytic activity and lower reduction potential towards the electrochemical detection of metronidazole (MTZ) over other modified electrodes including GR, GR-β-CD, and CuO NPs. Under optimized conditions, amperometry was used for the determination of MTZ using GR-β-CD/CuO NPs composite modified electrodes. The response of MTZ using the composite electrodes was linear over the range from 0.002 to 210.0 µM. This sensor showed the lowest limit of detection of 0.6 nM and was much lower than the previously reported MTZ sensors. In addition, the sensor is highly sensitive, selective and durable in the presence of a range of potentially interfering electroactive compounds.

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Section: Characterization Of Gr-b-cd/cuo Nps Compositesupporting

confidence: 91%

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Velusamy

Palanisamy

Kokulnathan

et al. 2018

Journal of Colloid and Interface Science

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“…In recent years, the use of nanomaterials for sensor research has attracted widespread interest [ 14 ]. A variety of metal nanoparticles, such as PtNPs [ 15 ], AuNPs [ 16 ], AgNPs [ 17 ], and SnNPs [ 18 ] have been reported to modify non-enzymatic sensors. Among them, many studies focus on Ag and Au nanoparticles due to their high catalytic activities, excellent bio-compatibility, ease of synthesis, and strong absorption property in the visible region [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Green Preparation of Ag-Au Bimetallic Nanoparticles Supported on Graphene with Alginate for Non-Enzymatic Hydrogen Peroxide Detection

et al. 2018

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In this work, a facile, environmentally friendly method was demonstrated for the synthesis of Ag-Au bimetallic nanoparticles (Ag-AuNPs) supported on reduced graphene oxide (RGO) with alginate as reductant and stabilizer. The prepared Ag-AuNPs/RGO was characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that uniform, spherical Ag-AuNPs was evenly dispersed on graphene surface and the average particle size is about 15 nm. Further, a non-enzymatic sensor was subsequently constructed through the modified electrode with the synthesized Ag-AuNPs/RGO. The sensor showed excellent performance toward H2O2 with a sensitivity of 112.05 μA·cm−2·mM−1, a linear range of 0.1–10 mM, and a low detection limit of 0.57 μM (S/N = 3). Additionally, the sensor displayed high sensitivity, selectivity, and stability for the detection of H2O2. The results demonstrated that Ag-AuNPs/RGO has potential applications as sensing material for quantitative determination of H2O2.

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“…The host-guest inclusion typical property of CDs could be combined with the increase of active sites and surface area through the loading of metal nanoparticles on carbon-based/β-CDs composite. [5,55,56]. For example, the surface modification of graphene with β-CDs through GNPs insertion could be a promising strategy for electrochemical enhanced sensing [57].…”

Section: Load Of Metal Nanoparticles On Carbon-based/β-cds Compositesmentioning

confidence: 99%

Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

Casulli

Taurino

Carrara

et al. 2019

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Cyclodextrins (CDs) are oligosaccharides composed of six (α), seven (β) or eight (γ) glucose units. Their inner hydrophobic cavity and hydrophilic external surface enable the formation of the “host-guest inclusion complex” with different organic or inorganic molecules showing high molecular selectivity. For these characteristics, CDs have many potential applications in electrochemical sensing. To enable CDs immobilization on the electrode surfaces, different chemical modifications are needed depending of the electrode material, while nanomaterials have been exploited to enhance the sensing signal. The CDs binding onto gold nanoparticles or carbon nanotubes, as an electron-transfer mediator to the electrode surface, is a typical example of it, while also graphene is largely used. The aim of the present review is to give an overview of CDs properties and their applications to electrochemical sensors for medical diagnostics. Different kinds for the functionalization of CDs onto electrode surfaces will be reviewed as well as their performance in presence of nanomaterials. Finally, CDs-based devices for sensing biomedical molecules of biomedical interest will be briefly presented and discussed.

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Voltammetric determination of Sudan I in food samples based on platinum nanoparticles decorated on graphene-β-cyclodextrin modified electrode

Cited by 61 publications

References 28 publications

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Novel electrochemical synthesis of copper oxide nanoparticles decorated graphene-β-cyclodextrin composite for trace-level detection of antibiotic drug metronidazole

Green Preparation of Ag-Au Bimetallic Nanoparticles Supported on Graphene with Alginate for Non-Enzymatic Hydrogen Peroxide Detection

Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

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