Electrochemical detection of serotonin in banana at green mediated PPy/Fe3O4NPs nanocomposites modified electrodes

Uwaya, Gloria Ebube; Fayemi, Omolola E.

doi:10.1016/j.sbsr.2020.100338

Cited by 17 publications

(8 citation statements)

References 34 publications

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“…As a result, the incorporation of the CuO into other materials with large surface area could create a composite with improved surface area and electrocatalytic activity towards an analyte of interest. This possibility has precedence in literature where green mediated nanoparticles have been combined with materials such as polypyrrole [ 50 ] and graphene oxide [ 51 , 52 , 53 ] with the nanoparticles bringing forth improved electrocatalytic activity to the resultant composite. Interestingly, green-mediated CuO have also been individually used for the modification of bare glassy carbon electrode for the detection of biomolecules [ 51 , 54 ].…”

Section: Resultsmentioning

confidence: 99%

Green and Traditional Synthesis of Copper Oxide Nanoparticles—Comparative Study

et al. 2020

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The current study compared the synthesis, characterization and properties of copper oxide nanoparticles (CuO) based on green and traditional chemical methods. The synthesized CuO were confirmed by spectroscopic and morphological characterization such as ultraviolet-visible (UV-vis) spectroscopy, fourier transform infrared (FTIR) spectroscopy, zeta potential, scanning electron microscopy (SEM) and energy dispersed X-ray (EDX). Electrochemical behavior of the modified electrodes was done using cyclic voltammetry (CV) in ferricyanide/ferrocyanide ([Fe(CN)6]4−/[Fe(CN)6]3−) redox probe. As revealed by UV spectrophotometer, the absorption peaks ranged from 290–293 nm for all synthesized nanoparticles. Based on SEM images, CuO were spherical in shape with agglomerated particles. Zeta potential revealed that the green CuO have more negative surface charge than the chemically synthesized CuO. The potential of the green synthesized nanoparticles was higher relative to the chemically synthesized one. Cyclic voltammetry studies indicated that the traditional chemically synthesized CuO and the green CuO have electrocatalytic activity towards the ferricyanide redox probe. This suggests that the green CuO can be modified with other nanomaterials for the preparation of electrochemical sensors towards analytes of interest.

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Section: Resultsmentioning

confidence: 99%

Green and Traditional Synthesis of Copper Oxide Nanoparticles—Comparative Study

et al. 2020

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“…For example, the detection of acetylcholine was successfully achieved using a conductive PEDOT film loaded with Fe 3 O 4 nanoparticles and reduced graphene oxide since the intensity of the oxidation peak present in the cyclic voltammograms was linear to the acetylcholine concentration [85]. Similarly, the detection of serotonin in banana was done by square wave voltammetry using conducting polypyrrole/Fe 3 O 4 nanocomposites [86] and the detection of danazol was performed by differential pulse voltammetry using conducting electrodeposited polyaniline [87].…”

Section: Voltammetrymentioning

confidence: 99%

Electrochemical Biosensors Based on Conducting Polymers: A Review

Lakard

2020

Applied Sciences

112

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Conducting polymers are an important class of functional materials that has been widely applied to fabricate electrochemical biosensors, because of their interesting and tunable chemical, electrical, and structural properties. Conducting polymers can also be designed through chemical grafting of functional groups, nanostructured, or associated with other functional materials such as nanoparticles to provide tremendous improvements in sensitivity, selectivity, stability and reproducibility of the biosensor’s response to a variety of bioanalytes. Such biosensors are expected to play a growing and significant role in delivering the diagnostic information and therapy monitoring since they have advantages including their low cost and low detection limit. Therefore, this article starts with the description of electroanalytical methods (potentiometry, amperometry, conductometry, voltammetry, impedometry) used in electrochemical biosensors, and continues with a review of the recent advances in the application of conducting polymers in the recognition of bioanalytes leading to the development of enzyme based biosensors, immunosensors, DNA biosensors, and whole-cell biosensors.

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“…These characteristics make them highly appealing for various scientific and technological applications. 25,26 Several research groups have investigated the applications of ternary nanocomposites, such as Ag–P(py)–Cu 2 O, 25 rGO–Ag 2 Se, 27 SPCE–ZnONR–PMB(DES), 28 poly(bromocresol l green)–Fe 3 O 4 , 29 P(py)–Fe 3 O 4 , 30 and FeC–AuNPs–MWCNTs 31 for 5-HT sensing. Even though ternary nanocomposites have been explored for 5-HT sensing, most of the reported articles failed to validate the sensors using gold standard methods, and also the real sample analysis was conducted with spiked blood or urine samples in the absence of 5-HT.…”

Section: Introductionmentioning

confidence: 99%