An Efficient and Highly Sensitive Amperometric Quercetin Sensor Based on a Lotus Flower Like SeO2-Decorated rGO Nanocomposite Modified Glassy Carbon Electrode

Karuppasamy, P.; Karthika, A.; Senthilkumar, Samuthirarajan; Rajapandian, V.

doi:10.1007/s12678-022-00707-9

Cited by 21 publications

(6 citation statements)

References 66 publications

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“…Therefore, the existence of Fe2O3 is further suggested for all the samples [43]. In addition, no noticeable peaks are assigned to the Se-O stretching vibration in the Se-FeOx and Se-FeOx-Co-2 samples, indicating the highly stable existence of Se QDs in air with the formation of Se-Se bonds [44]. Notably, the peaks of the two samples slightly differed.…”

Section: Resultsmentioning

confidence: 83%

Developing a Se Quantum Dots@ CoFeOx Composite Nanomaterial as a Highly Active and Stable Cathode Material for Rechargeable Zinc–Air Batteries

Zhang,

Wang,

Han

et al. 2023

Batteries

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With the urgent demand for clean energy, rechargeable zinc–air batteries (ZABs) are attracting increasing attention. Precious-metal-based electrocatalysts (e.g., commercial Pt/C and IrO2) are reported to be highly active towards the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Nevertheless, the limited catalytic kinetics, along with the scarcity of noble metals, still hinder the practical applications of ZABs. Consequently, it is of great importance to explore efficient bifunctional ORR/OER electrocatalysts with abundant reserves. Although iron oxides are considered to have some of the greatest potential as catalysts among the metal oxides, owing to their excellent redox properties, lower toxicity, simple preparation, and natural abundance, their poor electrical conductivity and high agglomeration still limit their development. In this work, we report a special Se quantum dots@ CoFeOx (Se-FeOx-Co) composite material, which exhibits outstanding bifunctional catalytic properties. And the potential gap between ORR and OER is low at 0.87 V. In addition, the ZAB based on Se-FeOx-Co achieves a satisfactory open-circuit voltage (1.46 V) along with an operation durability over 800 min. This research explores an effective strategy to fabricate iron oxide-based bifunctional catalysts, which contributes to the future design of related materials.

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Section: Resultsmentioning

confidence: 83%

Developing a Se Quantum Dots@ CoFeOx Composite Nanomaterial as a Highly Active and Stable Cathode Material for Rechargeable Zinc–Air Batteries

Zhang,

Wang,

Han

et al. 2023

Batteries

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“…In a different report, the quercetin determination in different brands of tea samples was conducted at a GCE modified by a 3D hybrid material consisting of 7-propinyloxy-3-(p-propinyloxyphenyl) coumarin bearing double terminal ethynyl groups and bounded to SWCNTs, with an LOD of 20 nM in the linear range from 0.25 to 3 µM [166]. Using nanocomposites-based sensors, the quercetin determination was achieved: (i) in apple juice, at a carbon-modified kaolin clay-composite electrode that showed an LOD of 0.057 mM, in the linear range from 0.12 to 182.1 mM [155]; (ii) in grape, apple and pear juices, honey, green and black tea, as well as blood, human breast milk and urine, at a GCE modified by a lotus flower like SeO2-decorated rGO nanocomposite that showed an LOD of 1.6 nM, in the linear range from 0.0 to 200 µM [159]; (iii) in green apple, green tea and honeysuckle, at a GCE modified by graphitic carbon nitride/nickel oxide (g-C 3 N 4 /NiO) nanocomposites that showed an LOD of 2.0 nM in the linear range from 0.010 to 250 µM [160]; (iv) in tea and honeysuckle, at a GCE modified by a β-cyclodextrin/graphene nanocomposite that showed an LOD of 1.0 nM in the linear range from 0.005 to 20 µM [161]; and (v) in peanut hulls, at a GCE modified by Au QDs and Au NPs that showed an LOD of 2.0 nM in the linear range from 0.01 to 6.0 µM [165].…”

Section: Flavonoids Determination In Foodmentioning

confidence: 99%

Electrochemistry of Flavonoids: A Comprehensive Review

Chiorcea-Paquim

2023

IJMS

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Flavonoids represent a large group of aromatic amino acids that are extensively disseminated in plants. More than six thousand different flavonoids have been isolated and identified. They are important components of the human diet, presenting a broad spectrum of health benefits, including antibacterial, antiviral, antimicrobial, antineoplastic, anti-mutagenic, anti-inflammatory, anti-allergic, immunomodulatory, vasodilatory and cardioprotective properties. They are now considered indispensable compounds in the healthcare, food, pharmaceutical, cosmetic and biotechnology industries. All flavonoids are electroactive, and a relationship between their electron-transfer properties and radical-scavenging activity has been highlighted. This review seeks to provide a comprehensive overview concerning the electron-transfer reactions in flavonoids, from the point of view of their in-vitro antioxidant mode of action. Flavonoid redox behavior is related to the oxidation of the phenolic hydroxy groups present in their structures. The fundamental principles concerning the redox behavior of flavonoids will be described, and the phenol moiety oxidation pathways and the effect of substituents and experimental conditions on flavonoid electrochemical behavior will be discussed. The final sections will focus on the electroanalysis of flavonoids in natural products and their identification in highly complex matrixes, such as fruits, vegetables, beverages, food supplements, pharmaceutical compounds and human body fluids, relevant for food quality control, nutrition, and healthcare research.

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Section: Introductionmentioning

confidence: 99%

“…Nanocomposites (NC) materials have spearheaded the research and development (R and D) as the frontier technology, having applications in versatile fields such as photocatalysis, 1 optoelectronics, 2 spintronics, 3 diode, 4 and solar cell. 5,6 Multifunction nanocomposites came into the limelight because they have many benefits over traditional composites and consider a key factor in sustainable development due to their diverse characteristics and power consumption. 7 Transparent conductive oxide materials (TCO) are the most attractive multifunction material and consider the charming solution for many challenges in optoelectronic and photocatalytic applications because they are the only class of materials that combine high transparency and high conductivity simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic activity and diode performance of ZnO‐GO nanocomposites via doping with aluminum

Hameed

Sharmoukh

Anis

et al. 2022

Intl J of Energy Research

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Herein, a twofold enhancement tactics were served to boost the photocatalytic activity as well as the diode performance of ZnO. The combination of aluminum (Al) and graphene oxide (GO) with ZnO fostered photocatalytic efficiency on Cong red (CR) and magnified the rectification of The Ag/n-Zn 1Àx Al x O-GO/ p-Si/Al heterostructure diode. Zn 1Àx Al x O-GO nanocomposites (x = 0.0, 0.03, 0.05, and 0.07 mol, GO = 2 wt.%) were successfully synthesized by solvothermal approach as confirmed by X-ray diffraction (XRD), high-resolution transmission microscope (HRTEM), Fourier transformer infrared (FTIR) and Raman data. The grain size was found to decrease from 38.05 to 68.58 nm when Al was varied from 0.0 to 0.07 mole, as established from the size-strain plot and FESEM micrographs. The data of Raman and FT-IR evidenced the existence of Al in the ZnO matrix. The band gap energies were found to approach the boundary of visible light, as Al reached 0.07 mol. The photocatalysis experiments showed that Zn 0.93 Al 0.07 O-GO nanocomposite has a higher removal efficiency. The scavenging investigation proved that the h + and OHȧ re major reactive radicals. The recycling test demonstrated Zn 0.93 Al 0.07 O-GO nanocomposite showed a high level of reusability. The Ag/n-Zn 1Àx Al x O-GO/p-Si/Al heterostructure diode was fabricated. The rectification and shunt resistance was boosted, whilst barrier height, ideality factor, and series resistance were decreased with the insertion of Al.

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An Efficient and Highly Sensitive Amperometric Quercetin Sensor Based on a Lotus Flower Like SeO2-Decorated rGO Nanocomposite Modified Glassy Carbon Electrode

Cited by 21 publications

References 66 publications

Developing a Se Quantum Dots@ CoFeOx Composite Nanomaterial as a Highly Active and Stable Cathode Material for Rechargeable Zinc–Air Batteries

Developing a Se Quantum Dots@ CoFeOx Composite Nanomaterial as a Highly Active and Stable Cathode Material for Rechargeable Zinc–Air Batteries

Electrochemistry of Flavonoids: A Comprehensive Review

Enhanced photocatalytic activity and diode performance of ZnO‐GO nanocomposites via doping with aluminum

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