A novel electrochemical sensor for determination of hydroquinone in water using FeWO4/SnO2 nanocomposite immobilized modified glassy carbon electrode

Karthika, A.; Raja, V. Ramasamy; Karuppasamy, P.; Suganthi, A.; Rajarajan, Muttukrishnan

doi:10.1016/j.arabjc.2019.06.008

Cited by 41 publications

(25 citation statements)

References 84 publications

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“…Considering the pK a of HQ is about 9.85, it was reported that pH near or higher than the pK a might lead it to easy deprotonation [ 34 ]. We, therefore, investigated the performance of the PEDOT/PL electrode in response to 6 mM of HQ in 0.1 M PBS buffer with different pH.…”

Section: Resultsmentioning

confidence: 99%

“…In Figure 5 A, we clearly observed that the measurement preferred pH 7.4 to other pH examined. While increasing the pH from 5.9 to 7.4, the HQ was deprotonated more easily, however, too much hydroxyl ions would decrease the adsorption of HQ on the PEDOT film and therefore the peak current [ 34 ]. According to Figure 5 B, the oxidation potential of HQ decreased from 0.3 V to 0.1 V by increasing pH from 5.9 to 8.9, which was ascribed to the easiness of HQ deprotonation under a relatively higher pH.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, there are abundant sulfur atoms in a PEDOT molecular structure that are ready for the stable immobilization of golden nanoparticles, which can then immobilize a variety of biomolecules with thiol groups (-SH) to construct various biosensors [ 31 , 32 , 33 ]. Modification of a platinum electrode with the conductive PEDOT film has also been reported to effectively eliminate the evitable hydrogen ion reduction or water oxidation at slightly negative or positive potentials [ 33 ], and to improve the sensitivity of a biosensor [ 32 , 34 , 35 , 36 ]. Therefore, the modification of GO or rGO with the conductive PEDOT will open up an era of fabricating more effective sensors for various applications.…”

Section: Resultsmentioning

confidence: 99%

“…Previously, we have also demonstrated that modification of a platinum electrode with the conductive PEDOT film could effectively eliminate the hydrogen ion reduction and water oxidation at slightly negative or positive potentials [33], which provided limited background interference for a sensitive detection [32,[34][35][36].…”

Section: Introductionmentioning

confidence: 95%

“…In particular, the sulfur atoms in the PEDOT molecular structure open up the opportunity to stably capture the golden nanoparticles, which are able to immobilize a variety of biomolecules with thiol groups (-SH), such as proteins and nucleotides, to construct various biosensors [ 31 , 32 , 33 ]. Previously, we have also demonstrated that modification of a platinum electrode with the conductive PEDOT film could effectively eliminate the hydrogen ion reduction and water oxidation at slightly negative or positive potentials [ 33 ], which provided limited background interference for a sensitive detection [ 32 , 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fabrication of an Extremely Cheap Poly(3,4-ethylenedioxythiophene) Modified Pencil Lead Electrode for Effective Hydroquinone Sensing

Chen

et al. 2021

Polymers

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Hydroquinone (HQ) is one of the major deleterious metabolites of benzene in the human body, which has been implicated to cause various human diseases. In order to fabricate a feasible sensor for the accurate detection of HQ, we attempted to electrochemically modify a piece of common 2B pencil lead (PL) with the conductive poly(3,4-ethylenedioxythiophene) or PEDOT film to construct a PEDOT/PL electrode. We then examined the performance of PEDOT/PL in the detection of hydroquinone with different voltammetry methods. Our results have demonstrated that PEDOT film was able to dramatically enhance the electrochemical response of pencil lead electrode to hydroquinone and exhibited a good linear correlation between anodic peak current and the concentration of hydroquinone by either cyclic voltammetry or linear sweep voltammetry. The influences of PEDOT film thickness, sample pH, voltammetry scan rate, and possible chemical interferences on the measurement of hydroquinone have been discussed. The PEDOT film was further characterized by SEM with EDS and FTIR spectrum, as well as for stability with multiple measurements. Our results have demonstrated that the PEDOT modified PL electrode could be an attractive option to easily fabricate an economical sensor and provide an accurate and stable approach to monitoring various chemicals and biomolecules.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fabrication of an Extremely Cheap Poly(3,4-ethylenedioxythiophene) Modified Pencil Lead Electrode for Effective Hydroquinone Sensing

Chen

et al. 2021

Polymers

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Development of Aloe vera‐titanium oxide‐based ultrasensitive sensor for the quantification of quercetin

Raja

Annu

Jain

2020

Analytical Science Advances

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In the present work, a novel sensor developed for the quantification of quercetin (QRC) is being reported. Due to synergistic effects of Aloe vera and titanium oxide, voltammetric performance of the developed sensor (ALV‐TiO2/glassy carbon electrode) was greatly enhanced. The fabricated sensor was characterized by scanning electron microscopy, X‐ray diffraction, energy dispersive X‐ray, and electrochemical impedance spectroscopy. The sensor was applied to study electrochemical behavior of QRC using square wave voltammetry. Under optimal condition, the developed sensor exhibited a linear response in the range of 3.3 × 10−7 to 2.31 × 10−6 µM with a detection limit of 0.8 nM. The analytical utility of the proposed sensor was justified by applying it for the analysis of QRC in real samples.

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Electrochemical Sensing Platforms of Dihydroxybenzene: Part 1 – Carbon Nanotubes, Graphene, and their Derivatives

Nayem

Shah

Sultana

et al. 2021

The Chemical Record

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Dihydroxybenzene is regarded as a serious environmental pollutant. Its detection through electrochemical methods is still challenging due to having a similar structure and overlapping signals with the conventional bare electrode. Thanks to the unique features and wide applicability of carbon nanotubes, graphene, and their derivatives, they can be used as modifiers to overcome the poor resolution ability of bare electrodes in the detection of dihydroxybenzene. This review focuses on the use of carbon nanotubes, graphene, and their derivatives and nanocomposites to enhance the electrocatalytic activity of conventional bare electrodes for dihydroxybenzene sensing. The reports from 2011–2020 on the simultaneous and/or individual detection of three different dihydroxybenzenes – hydroquinone, catechol, and resorcinol – are summarized. This review also highlights the challenges and prospects surrounding the sensitive and selective detection of dihydroxybenzene.

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A novel electrochemical sensor for determination of hydroquinone in water using FeWO4/SnO2 nanocomposite immobilized modified glassy carbon electrode

Cited by 41 publications

References 84 publications

Fabrication of an Extremely Cheap Poly(3,4-ethylenedioxythiophene) Modified Pencil Lead Electrode for Effective Hydroquinone Sensing

Fabrication of an Extremely Cheap Poly(3,4-ethylenedioxythiophene) Modified Pencil Lead Electrode for Effective Hydroquinone Sensing

Development of Aloe vera‐titanium oxide‐based ultrasensitive sensor for the quantification of quercetin

Electrochemical Sensing Platforms of Dihydroxybenzene: Part 1 – Carbon Nanotubes, Graphene, and their Derivatives

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