The use of carbon-based nanomaterials conjugated to cobalt phthalocyanine complex in the electrochemical detection of nitrite

Ndebele, Nobuhle; Nyokong, Tebello

doi:10.1016/j.diamond.2022.109672

Cited by 5 publications

(4 citation statements)

References 64 publications

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“…Therein, I pa is the oxidation current peak (A), A is the effective surface area of the electrode (cm 2 ), D is the diffusion coefficient of [Fe(CN) 6 ] 3−/4− (6.3 × 10 −6 cm 2 s −1 ), n is the number of electron transfers ( n = 1), v is the scanning rate (V s −1 ), and c is the volumetric concentration of [Fe(CN) 6 ] 3−/4− (mol cm −3 ). 40 According to the formula, the average electroactive surface areas of the GCE, Fe 3 O 4 @Au/GCE, [P 2 W 17 V/PEI] 4 /GCE, and [P 2 W 17 V/PEI] 4 /Fe 3 O 4 @Au/GCE are 0.0456 cm 2 , 0.0509 cm 2 , 0.0483 cm 2 , and 0.0522 cm 2 , respectively. This indicated that the [P 2 W 17 V/PEI] 4 /Fe 3 O 4 @Au/GCE has a more electrically active surface area, which significantly enhances the current response and redox reaction rate.…”

Section: Resultsmentioning

confidence: 99%

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Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe₃O₄@Au for electrochemical detection of sodium nitrite

Liu,

Xing,

Guan

et al. 2024

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

“…Furthermore, the Randles–Sevcik equation, which is presented below, may be used to compute the effective area of the various sensors. 40 I pa = (2.69 × 10 5 ) n 3/2 D 1/2 v 1/2 Ac …”

Section: Resultsmentioning

confidence: 99%

Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe₃O₄@Au for electrochemical detection of sodium nitrite

Liu,

Xing,

Guan

et al. 2024

New J. Chem.

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“…Hybrids of metal phthalocyanines and porphyrins with such carbon nanomaterials as carbon nanotubes, nanohorns, graphite, graphene, and their derivatives are widely used in various chemical sensors, especially resistive and electrochemical ones [6,[86][87][88]. To obtain hybrid materials, nanocarbon materials are modified with phthalocyanines and porphyrins by both covalent and non-covalent functionalization [81].…”

Section: Hybrid Materials Of Phthalocyanines and Porphyrins With Carb...mentioning

confidence: 99%

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Basova

2024

Chemosensors

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In this review, the state of research over the past fifteen years in the field of the applications of metal phthalocyanines and porphyrin derivatives as well as their hybrid materials with carbon nanotubes, metal oxides, and polymers in optical sensors based on the phenomenon of surface plasmon resonance (SPR) is analyzed. The first chapter of the review presents an analysis of works on the use of porphyrins and phthalocyanines in classical SPR sensors for the detection of gases and volatile organic vapors, as well as their improved modifications, such as total internal reflection ellipsometry (TIRE) and magneto-optical SPR (MOSPR) methods, while the second chapter is devoted to their application for the detection of various analytes in solutions. The third chapter of the review summarizes publications describing recent advances in the use of porous materials based on hybrids of carbon nanotubes and oxides with metal phthalocyanines. The fourth chapter describes two-dimensional metal-organic frameworks (MOFs) based on metal porphyrin derivatives as SPR sensitizers.

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“…Nitrite is an intermediate oxidation state between nitrate and ammonia [1]. It is well known that sodium nitrite is widely used as a preservative and color fixative in additives [2,3].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Au Magnetic Nanocomposites Using Waste Chestnut Skins and Their Application as a Peroxidase Mimic Nanozyme Electrochemical Sensing Platform for Sodium Nitrite

Guan,

Xing,

Liu

2023

Foods

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An electrochemical sensor with high sensitivity for the detection of sodium nitrite was constructed based on the peroxidase-like activity of Au magnetic nanocomposites (Au@Fe3O4). The Au@Fe3O4 composite nanoparticles were green-synthesized via the reduction of gold nanoparticles (AuNPs) from waste chestnut skins combined with the sonochemical method. The nanoparticles have both the recoverability of Fe3O4 and the advantage of being able to amplify electrical signals. Furthermore, the synergistic effect of green reduction and sonochemical synthesis provides a functional approach for the preparation of Au@Fe3O4 with significant peroxidase-like activities. The physicochemical properties were characterized using transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), the Brunauer–Emmett–Teller (BET) method, and Fourier transform infrared spectroscopy (FT-IR). The electrochemical properties of sodium nitrite were determined with cyclic voltammetry (CV) and chronoamperometry (i-t). The results revealed that Au@Fe3O4 acted as a peroxidase mimic to decompose hydrogen peroxide to produce free radicals, while ·OH was the primary free radical that promoted the oxidation of sodium nitrite. With the optimal detection system, the constructed electrochemical sensor had a high sensitivity for sodium nitrite detection. In addition, the current response had a good linear relationship with the sodium nitrite concentration in the range of 0.01–100 mmol/L. The regression equation of the working curve was y = 1.0752x + 4.4728 (R2 = 0.9949), and the LOD was 0.867 μmol/L (S/N = 3). Meanwhile, the constructed detection system was outstanding in terms of recovery and anti-interference and had a good detection stability of more than 96.59%. The sensor has been successfully applied to a variety of real samples. In view of this, the proposed novel electrochemical analysis method has great prospects for application in the fields of food quality and environmental testing.

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The use of carbon-based nanomaterials conjugated to cobalt phthalocyanine complex in the electrochemical detection of nitrite

Cited by 5 publications

References 64 publications

Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe₃O₄@Au for electrochemical detection of sodium nitrite

Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe₃O₄@Au for electrochemical detection of sodium nitrite

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Green Synthesis of Au Magnetic Nanocomposites Using Waste Chestnut Skins and Their Application as a Peroxidase Mimic Nanozyme Electrochemical Sensing Platform for Sodium Nitrite

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The use of carbon-based nanomaterials conjugated to cobalt phthalocyanine complex in the electrochemical detection of nitrite

Cited by 5 publications

References 64 publications

Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe3O4@Au for electrochemical detection of sodium nitrite

Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe3O4@Au for electrochemical detection of sodium nitrite

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Green Synthesis of Au Magnetic Nanocomposites Using Waste Chestnut Skins and Their Application as a Peroxidase Mimic Nanozyme Electrochemical Sensing Platform for Sodium Nitrite

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Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe₃O₄@Au for electrochemical detection of sodium nitrite

Facile fabrication of composite film modified electrodes based on vanadium-substituted tungstophosphate with Fe₃O₄@Au for electrochemical detection of sodium nitrite