<i>Hibiscus sabdariffa</i> L. Anthocyanins Immobilization on TiO<sub>2</sub> Nanotubes and Its Electrochemical Characterization as a Hydrogen Peroxide Sensing Electrode

Martinez-Pacheco, M.; Lozada-Ramírez, José Daniel; Martínez‐Huitle, Carlos A.; Cerro‐López, Mónica

doi:10.1149/2.0431915jes

Cited by 8 publications

(5 citation statements)

References 48 publications

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“…At present, many methods for H 2 O 2 detection have been established including chemiluminescence, 3 fluorescence, 4 colorimetry 5 and electrochemical sensing. [6][7][8] In comparison, electrochemical sensing has attracted great interests due to its high sensitivity, rapid response and easy miniaturization.…”

mentioning

confidence: 99%

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H₂O₂ Released from Living Cells

Zhao

Jiang

et al. 2020

J. Electrochem. Soc.

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Real-time detection of hydrogen peroxide (H2O2) released from living cells is of great value in further understanding the occurrence process of some diseases and searching for new therapeutic strategies. However, selective monitoring of H2O2 in living cells is still a huge challenge due to its low concentration, large diffusivity and high reactivity. Herein, three-dimensional carbon nanotubes spaced graphene aerogel incorporated with Prussian blue nanoparticles (3D PB NPs/G-CNTs) has been successfully synthesized via one-step mild temperature treatment, in which the PB NPs possess intrinsic peroxidase-like activity while the 3D porous structure of G-CNTs with large surface area and high conductivity can efficiently enhance catalytic performance. The composite exhibited good catalytic performances toward H2O2 with a sensitivity of 134.3 μA mM−1 cm−2 and a low detection limit of 95 nM in a linear range of 1–3161 μM. Furthermore, the proposed sensor was successfully used for real-time detection of H2O2 released from living cells, indicating the potential application of as-prepared 3D PB NPs/G-CNTs in monitoring the critical pathological process in living cells.

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confidence: 99%

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H₂O₂ Released from Living Cells

Zhao

Jiang

et al. 2020

J. Electrochem. Soc.

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“…Figure 4 presents the FTIR spectra obtained for the extract of grape skin before and after being adsorbed onto the surface of TiO 2 . For the FTIR spectrum of the grape skin extract, a broad band in the range of 3700–3000 cm −1 is the stretching vibration of O–H groups, and the band appearing at 2924 cm −1 is ascribed to the C–H stretching [ 32 ]. The band at 1616 cm −1 is assigned to the C=C stretching vibration of aromatic rings from anthocyanins, while the band at 1365 cm −1 denotes the O–H bending of phenol [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

“…A typical band localized at 1446 cm −1 originates from the OH–CH 2 bonds of the phenolic rings presented in the anthocyanins [ 34 ]. In addition, the bands at 1285 and 1201 cm −1 are attributed to the C–O stretching from both phenolic groups and disaccharides that confirm the anthocyanins’ structure, and both bands at 825 and 778 cm −1 correspond to the C–H bending in the aromatic rings [ 32 ]. For the FTIR spectrum of the grape skin extract after being adsorbed onto the surface of TiO 2 , some characteristic bands of anthocyanins can still be clearly identified.…”

Section: Resultsmentioning

confidence: 99%

Dual Application of Waste Grape Skin for Photosensitizers and Counter Electrodes of Dye-Sensitized Solar Cells

Yuan

Wan

2022

Nanomaterials

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Dye-sensitized solar cells (DSSCs), a powerful system to convert solar energy into electrical energy, suffer from the high cost of the Pt counter electrode and photosensitizer. In this study, the dual application of waste grape skin is realized by employing the grape skin and its extract as the carbon source of the carbon-based counter electrode and photosensitizer, respectively. The ultraviolet–visible absorption and Fourier transform infrared spectroscopy verify the strong binding between the dye molecules (anthocyanins) in the extract and the TiO2 nanostructure on the photoanode, contributing to a high open-circuit voltage (VOC) value of 0.48 V for the assembled DSSC device. Moreover, the waste grape skin was subjected to pyrolysis and KOH activation and the resultant KOH-activated grape skin-derived carbon (KA-GSDC) possesses a large surface area (620.79 m2 g−1) and hierarchical porous structure, leading to a high short circuit current density (JSC) value of 1.52 mA cm−2. Additionally, the electrochemical impedance spectroscopy reveals the efficient electron transfer between the electrocatalyst and the redox couples and the slow recombination of electrolytic cations and the photo-induced electrons in the conduction band of TiO2. These merits endow the DSSC with a high photovoltaic efficiency of 0.48%, which is 33% higher than that of a common Pt-based DSSC (0.36%). The efficiency is also competitive, compared with some congeneric DSSCs based on other natural dyes and Pt counter electrode. The result confirms the feasibility of achieving the high-value application of waste grape skin in DSSCs.

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“…Compared with non-enzymatic electrochemical sensors, enzymatic electrochemical sensors possess relatively high selectivity, while some drawbacks including low stability, critical operating condition, complicated enzyme immobilization process and high-cost are also obvious. [15][16][17] Therefore, the development of non-enzymatic sensors has drawn dramatic attention from the researchers around the world. 18 The fabrication of suitable catalytic materials is becoming the key issue in developing non-enzymatic sensors.…”

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confidence: 99%

Facile and Rapid Fabrication of Petal-like Hierarchical MnO₂ Anchored SWCNTs Composite and its Application in Amperometric Detection of Hydrogen Peroxide

Huang¹,

Zou²,

Yu³

2020

J. Electrochem. Soc.

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Hydrogen peroxide (H2O2) is a vital analyte, such as an intermediate in biological system and a widely used industrial oxidant. It is of great significance for sensitive and accurate detection of H2O2 in practical applications. In this study, petal-like hierarchical MnO2 anchored SWCNTs composite was prepared by a facile one-step, template-free hydrothermal method. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to observe the surface morphology, crystalline phase and chemical bonding state of MnO2-SWCNTs composite, respectively. Under the optimum conditions, the as-prepared nonenzymatic sensor (MnO2-SWCNTs/GCE) showed high sensitivity and selectivity for H2O2. The peak current was linearly dependent on the H2O2 concentration, and a linear calibration curve could be obtained in the H2O2 concentration range 15.0–2000 μM. The limit of detection (LOD) was calculated to be 1.0 μM (signal-to-noise ratio of 3, S/N = 3). The inter-day and intra-day precisions were estimated to be <5.0%. The recoveries of H2O2 in disinfectant at MnO2-SWCNTs/GCE were in the range of 96.7%–111.9%, and RSD were 2.15%–7.58%. The results demonstrated MnO2-SWCNTs/GCE had excellent stability, good reproducibility, and high selectivity. Hence, MnO2-SWCNTs/GCE can be a potential candidate for the practically quantitative detection of H2O2 in real samples.

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Hibiscus sabdariffa L. Anthocyanins Immobilization on TiO₂ Nanotubes and Its Electrochemical Characterization as a Hydrogen Peroxide Sensing Electrode

Cited by 8 publications

References 48 publications

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H₂O₂ Released from Living Cells

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H₂O₂ Released from Living Cells

Dual Application of Waste Grape Skin for Photosensitizers and Counter Electrodes of Dye-Sensitized Solar Cells

Facile and Rapid Fabrication of Petal-like Hierarchical MnO₂ Anchored SWCNTs Composite and its Application in Amperometric Detection of Hydrogen Peroxide

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Hibiscus sabdariffa L. Anthocyanins Immobilization on TiO2 Nanotubes and Its Electrochemical Characterization as a Hydrogen Peroxide Sensing Electrode

Cited by 8 publications

References 48 publications

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H2O2 Released from Living Cells

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H2O2 Released from Living Cells

Dual Application of Waste Grape Skin for Photosensitizers and Counter Electrodes of Dye-Sensitized Solar Cells

Facile and Rapid Fabrication of Petal-like Hierarchical MnO2 Anchored SWCNTs Composite and its Application in Amperometric Detection of Hydrogen Peroxide

Contact Info

Product

Resources

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Hibiscus sabdariffa L. Anthocyanins Immobilization on TiO₂ Nanotubes and Its Electrochemical Characterization as a Hydrogen Peroxide Sensing Electrode

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H₂O₂ Released from Living Cells

3D Carbon Nanotubes Spaced Graphene Aerogel Incorporated with Prussian Blue Nanoparticles for Real-Time Detection of H₂O₂ Released from Living Cells

Facile and Rapid Fabrication of Petal-like Hierarchical MnO₂ Anchored SWCNTs Composite and its Application in Amperometric Detection of Hydrogen Peroxide