Graphene oxide lamellar membrane with enlarged inter-layer spacing for fast preconcentration and determination of trace metal ions

Ahmad, Hilal; Husain, Fohad Mabood; Khan, Rais Ahmad

doi:10.1039/d1ra01055g

Cited by 17 publications

(5 citation statements)

References 44 publications

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“…The surface morphology and layer structure of GO, GO-Ag and GO-Ni nanocomposites were examined by SEM spectroscopy. The Figure 2 shows the formation of graphene oxide with a closely packed lamellar structure and a well packed layered structure [33]. Although it has some impurities which does not show the proper multilayered structure and is instead in the form of flakes [34].…”

Section: Sem Analysismentioning

confidence: 99%

Dielectric Properties and Electrochemical behavior of Graphene Oxide derived from Myanmar Coal Minerals

et al. 2023

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Graphene Oxide (GO) metal nanocomposites make up an emerging class of advanced materials and enhance material functionality to obtain multifunctional properties and working towards superior performance of energy storage devices. GO was derived from Myanmar coal minerals using Modified Hummer method. The silver and nickel nanoparticles were used as metal ions or metal nanoparticles to form GO nanocomposites. Their characteristics were identified by XRD, SEM and Raman Spectroscopy. The energy gap of GO and GO composites was also investigated by the aid of UV-Vis spectroscopy. The dielectric constant is measures of the amount of electrical energy that can be stored in GO derived from coal mineral. The frequency-dependent dielectric properties and AC conductivity has been explored using GW INSTEK LCR-8110 meter. It was found that the dielectric constant is maximum at low frequencies region and decreases with increasing frequency. The electrochemical performance of this sample was examined by cyclic voltammetry (CV) measurement. The CV curves of GO have typical rectangular-like shape and no evident oxidation/reduction peak. The prototypes of flat-shaped capacitors were prepared and their capacitive values were also determined. The as-prepared GO on the copper foil can be directly used to fabricate solid-state super capacitor.

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Section: Sem Analysismentioning

confidence: 99%

Dielectric Properties and Electrochemical behavior of Graphene Oxide derived from Myanmar Coal Minerals

et al. 2023

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“…In a recent study, Hilal and co-workers investigated the used of single to few-layered GO sheets to produce a lamellar GO membrane and succeeded in the extraction and preconcentration of Cd (II), Pb (II), and Cu (II) from industrial wastewater. Under optimized conditions, a detection limit of 1.1 ngL −1 was achieved with excellent accuracy between 4 and 5% across five consecutive measurements [ 180 ].…”

Section: Applications Of Graphenementioning

confidence: 99%

Graphene Synthesis Techniques and Environmental Applications

Abbas

Shinde²,

Abdelkareem³

et al. 2022

Materials

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Graphene is fundamentally a two-dimensional material with extraordinary optical, thermal, mechanical, and electrical characteristics. It has a versatile surface chemistry and large surface area. It is a carbon nanomaterial, which comprises sp2 hybridized carbon atoms placed in a hexagonal lattice with one-atom thickness, giving it a two-dimensional structure. A large number of synthesis techniques including epitaxial growth, liquid phase exfoliation, electrochemical exfoliation, mechanical exfoliation, and chemical vapor deposition are used for the synthesis of graphene. Graphene prepared using different techniques can have a number of benefits and deficiencies depending on its application. This study provides a summary of graphene preparation techniques and critically assesses the use of graphene, its derivates, and composites in environmental applications. These applications include the use of graphene as membrane material for the detoxication and purification of water, active material for gas sensing, heavy metal ions detection, and CO2 conversion. Furthermore, a trend analysis of both synthesis techniques and environmental applications of graphene has been performed by extracting and analyzing Scopus data from the past ten years. Finally, conclusions and outlook are provided to address the residual challenges related to the synthesis of the material and its use for environmental applications.

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“…30 However, due to the densely packed structure of graphene paper, the barrier between graphene and the electrolyte lowers the conductivity of graphene materials, and the problem continues. 32,33 In aqueous NaCl electrolyte, rGO sheets had a specic capacitance of 75.29 F g À1 . 34 In addition, in a 6 mol L À1 KOH electrolyte, carbon quantum dots (CQDs) assembled to a multilayer carbon demonstrated volumetric capacitance of 157.4 F cm À3 .…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Systematic study of physicochemical and electrochemical properties of carbon nanomaterials

et al. 2022

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Graphene oxide lamellar membrane with enlarged inter-layer spacing for fast preconcentration and determination of trace metal ions

Abstract: A porous graphene oxide membrane with increased interlayer spacing of GO sheets was prepared by covalently introducing poly-aminophosphonic acid in between the GO sheets. The membrane was successfully employed for the extraction of heavy metal ions.

Cited by 17 publications

References 44 publications

Dielectric Properties and Electrochemical behavior of Graphene Oxide derived from Myanmar Coal Minerals

Dielectric Properties and Electrochemical behavior of Graphene Oxide derived from Myanmar Coal Minerals

Graphene Synthesis Techniques and Environmental Applications

Systematic study of physicochemical and electrochemical properties of carbon nanomaterials

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