Reduced graphene oxide cross-linked L-cysteine modified glassy carbon electrode for detection of environmental pollutant of hydroquinone

Xia, Yang; Wang, Kaiqian; Shi, Ying; Gui, Xingcai; Lv, Chaonan; Tao, Haisheng

doi:10.1016/j.flatc.2020.100214

Cited by 17 publications

(4 citation statements)

References 22 publications

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“…The attachment of Cys with a free −SH group is well documented in several reports, ,− whereas attachment via the sulfur group leading to the free −NH 2 group is also possible through other chemical methods. , Interestingly, Javidparvar et al schematically described both types of covalent attachment . Nevertheless, there are various other reduced forms of molecular structures reported such as GO sheets bridged by the Cys group, cross-linked structure through L-Cys, , and enhanced water dispersibility through thiol-ene click chemistry, which requires special chemical steps.…”

Section: Introductionmentioning

confidence: 99%

“…21,23 Interestingly, Javidparvar et al schematically described both types of covalent attachment. 29 Nevertheless, there are various other reduced forms of molecular structures reported such as GO sheets bridged by the Cys group, 30 cross-linked structure through L-Cys, 21,31 and enhanced water dispersibility through thiol-ene click chemistry, 32 which requires special chemical steps.…”

Section: ■ Introductionmentioning

confidence: 99%

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Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Singh,

Kar

2023

J. Phys. Chem. C

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The surface functionalization of graphene oxide (GO) with L-cysteine is a potent candidate for applications like enzymatic and non-enzymatic bio-sensing and biomedical purposes. Though numerous studies are available detailing efficient synthesis to applications, their interaction with the solvent and the factors affecting the stability should have been considered. Characterizing Cys-GO through Raman, Fourier-transform infrared, and dynamic light scattering spectroscopy quantified the chemical nature and revealed varying particle size distribution compared to GO. This indicates that Cys-GO sheets possibly exist in different ensemble states in the aqueous solution. To probe into its dynamic behavior, classical all-atom simulations have been employed. The computational results align with the experimental differences observed for precursor graphene, GO, and functionalized Cys-GO. The results demonstrate that the presence of a disulfide bond between Cys-GO sheets stabilizes the structural dynamicity compared to the individual or dimer sheet. The interaction with water molecules introduces variable deformation through the interplay between diffusive and Brownian motion of solvent over the sheets. The disulfide bond holds the sheets together, enabling more inter-sheet interactions and reducing random movement. The study provides deep physical insights into graphene-based materials, paving the way for the design of nanosheets with tunable characteristics for future nanocomposite development and sensing applications.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Singh,

Kar

2023

J. Phys. Chem. C

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“…Over the recent years, the rapid advancement of science and technology to meet human needs has led to discoveries which have led to major environmental hazards. 1 Disposal of industrial effluents into the environment will have a massive impact and become toxic to land and aquatic life. Hence, identifying and removing harmful molecules from industrial effluents is paramount.…”

Section: Introductionmentioning

confidence: 99%

Catechol sensor based on pristine and transition metal embedded holey graphyne: a first-principles density functional theory study

et al. 2022

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“…Accordingly, the precise selection of nanomaterials is the basis for the development of highly selective and sensitive supramolecular equipment with affinity to the analyte of interest [101][102][103][104][105][106][107][108][109][110][111][112][113][114]. Recent biological and chemical sensing electrodes have benefited from core/shell nanoparticles [115][116][117][118], metal nanostructures [119][120][121][122][123][124][125][126], oxides [127][128][129][130][131][132][133][134][135], bimetallic compounds [136,137], carbon-based structures [138][139][140] and other mediators [141,142]. Chemical modification is possible for all electrodes used in electrochemical measurements, including carbon paste electrode gold electrodes, screen-printed electrodes and glassy carbon electrodes [143][144]…”

Section: Introductionmentioning

confidence: 99%

An overview of recent advances in the detection of ascorbic acid by electrochemical techniques

Mohabis¹,

Fazeli²,

Amini³

et al. 2022

J. Electrochem. Sci. Eng.

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Ascorbic acid is a water-soluble vitamin essential in human nutrition, an antioxidant, a scavenger of free radicals in biological systems, and a cofactor of several enzymes. The reference range for ascorbic acid in healthy people is 6 - 20 mg L-1. The variable concentration of ascorbic acid within biology fluids was found in clinical investigations to be a metric for assessing the exact amount of oxidative stress in the body's metabolism. Electroanalytical techniques are a group of methods in analytical chemistry, especially with extensive application in pharmaceutical industries. These techniques attracted further attention due to their unique characteristics, such as reduced sample or solvent consumption, high analysis speed, low operating cost, and high sensitivity, which made them suitable candidates for replacement or supplementation for spectrophotometry and separation approaches. The purpose of this article is to scrutinize the mechanisms and applications of current electroanalytical methods, including amperometric techniques, square wave voltammetry, differential pulse voltammetry and cyclic voltammetry, in their applications in pharmaceutical analysis for the detection of ascorbic acid. Related examples have been cited in the form of selected studies.

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Reduced graphene oxide cross-linked L-cysteine modified glassy carbon electrode for detection of environmental pollutant of hydroquinone

Cited by 17 publications

References 22 publications

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Catechol sensor based on pristine and transition metal embedded holey graphyne: a first-principles density functional theory study

An overview of recent advances in the detection of ascorbic acid by electrochemical techniques

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