Electrochemical determination of quercetin using glassy carbon electrode modified with WS2/GdCoO3 nanocomposite

Mariyappan, Vinitha; Karuppusamy, Naveen; Chen, Shen‐Ming; Paulsamy, Raja; Ramachandran, Rasu

doi:10.1007/s00604-022-05219-3

Cited by 24 publications

(4 citation statements)

References 32 publications

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“…Materials investigated using the EASA approach include both metallic and non-metals such as carbon-based materials ranging in size from small nanosized electrocatalysts up to macro-scale electrodes. However, examples abound in the literature of the use of hexacyanoferrate II/III use for this purpose [139][140][141][142][143][144]. Concerns highlighted in the above discussion serve as a warning regarding the use of this couple in such an application.…”

Section: Assessment Of Electrochemically Active Surface Areamentioning

confidence: 99%

Use of Inner/Outer Sphere Terminology in Electrochemistry—A Hexacyanoferrate II/III Case Study

2023

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Salts of hexacyanoferrate II/III anions have been widely used as redox couple probe molecules to determine the characteristics of electrode surfaces. Examples include the assessment of electrocatalysts for energy applications and electrocatalysts for the detection of biological or chemical species, as well as the determination of electrochemically active surface areas. An examination of the electrochemical literature, based largely on cyclic voltammetric investigations, reveals a wide range of peak separation and/or heterogeneous electron transfer rate constants, classified sometimes as inner or outer sphere electron transfer processes. Originally developed for the mechanistic interpretation of inorganic transition metal compounds in solution, this terminology has since been extended to account for heterogeneous electron transfer occurring at electrodes. In the case of the hexacyanoferrate II/III anions, there can be a number of reasons why it sometimes behaves as an outer sphere probe and at other times displays inner sphere electron transfer characteristics. After examining some of the structural and chemical properties of the hexacyanoferrate II/III species, the methods used to determine such classifications are described. The most common method involves measuring peak-to-peak separation in a cyclic voltammogram to ascertain a heterogeneous rate constant, but it has inherent flaws. This paper reviews the reasons for the classification disparity, including the effects of various oxygen surface species, the influence of organic surface films, the nature of the cation counter-ion, surface adsorption and surface hydrophilicity/hydrophobicity. Other surface interactions may also take place, such as those occurring with Au corrosion or pH effects. These can impact the electrical double layer and thus may affect the electron transfer process. Consequently, it is recommended that hexacyanoferrate II/III should be considered a multi-sphere or alternatively a surface-sensitive electron transfer species.

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Section: Assessment Of Electrochemically Active Surface Areamentioning

confidence: 99%

Use of Inner/Outer Sphere Terminology in Electrochemistry—A Hexacyanoferrate II/III Case Study

2023

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“…Numerous analytical methods have been employed, including high-performance liquid chromatography, 4-6 spectrophotometry, [7][8][9] capillary electrophoresis, 10,11 and electrochemical techniques. [12][13][14][15] Simple instrumentation, fast response, and high sensitivity make electrochemistry a possible way out. First, quercetin is one of the polyphenols.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical determination of quercetin in a choline chloride-based ionic liquid

Guo

Wang

et al. 2023

Anal. Methods

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“…in body fluids including plasma [1,6], urine [1], etc. Uses of a colorimetric method, chromatographic method, electrophoresis, etc., are suffering from numerous demerits including high cost, being timeconsuming, requiring sophisticated instruments, etc [10]. In addition, there are chances of poor sensitivity and selectivity towards the target analyte.…”

Section: Introductionmentioning

confidence: 99%

Graphene Quantum Dots Incorporated UiO-66-NH ₂ Based Fluorescent Nanocomposite for Highly Sensitive Detection of Quercetin

Nangare¹,

Patil²,

Chaudhari³

et al. 2023

Nano Biomedicine and Engineering

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Quercetin can help with a variety of health problems. Most methods for measuring quercetin in biological fluids are characterized by low sensitivity and selectivity. The employment of metal-organic frameworks in sensor applications with carbon-based materials ushers in a new era. In this study, blue fluorescent graphene quantum dots (GQDs) embedded in a UiO-66-NH 2 metal-organic framework-based nanoprobe (GQDs@UiO-66-NH 2 ) were constructed for quercetin sensing. Initially, maize husk was used to produce blue fluorescent GQDs, whereas zirconium tetrachloride and 2-aminoterephthalic acid were used to synthesize extremely luminous UiO-66-NH 2 .

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Electrochemical determination of quercetin using glassy carbon electrode modified with WS2/GdCoO3 nanocomposite

Cited by 24 publications

References 32 publications

Use of Inner/Outer Sphere Terminology in Electrochemistry—A Hexacyanoferrate II/III Case Study

Use of Inner/Outer Sphere Terminology in Electrochemistry—A Hexacyanoferrate II/III Case Study

Enhanced electrochemical determination of quercetin in a choline chloride-based ionic liquid

Graphene Quantum Dots Incorporated UiO-66-NH ₂ Based Fluorescent Nanocomposite for Highly Sensitive Detection of Quercetin

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Electrochemical determination of quercetin using glassy carbon electrode modified with WS2/GdCoO3 nanocomposite

Cited by 24 publications

References 32 publications

Use of Inner/Outer Sphere Terminology in Electrochemistry—A Hexacyanoferrate II/III Case Study

Use of Inner/Outer Sphere Terminology in Electrochemistry—A Hexacyanoferrate II/III Case Study

Enhanced electrochemical determination of quercetin in a choline chloride-based ionic liquid

Graphene Quantum Dots Incorporated UiO-66-NH 2 Based Fluorescent Nanocomposite for Highly Sensitive Detection of Quercetin

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Product

Resources

About

Graphene Quantum Dots Incorporated UiO-66-NH ₂ Based Fluorescent Nanocomposite for Highly Sensitive Detection of Quercetin