Graphene Synthesis by Ultrasound Energy-Assisted Exfoliation of Graphite in Various Solvents

Gürünlü, Betül; Taşdelen-Yücedağ, Çiğdem

doi:10.3390/cryst10111037

Cited by 15 publications

(9 citation statements)

References 52 publications

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“… Schematic representation of the liquid phase exfoliation method [Reprinted with permission from ref. [ 48 ] Gürünlü, B.; Taşdelen-Yücedağ, Ç.; Bayramoğlu, M. Graphene Synthesis by Ultrasound Energy-Assisted Exfoliation of Graphite in Various Solvents. Crystals 2020 , 10 , 1037.…”

Section: General Methods Of Graphene Synthesismentioning

confidence: 99%

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

et al. 2022

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The term graphene was coined using the prefix “graph” taken from graphite and the suffix “-ene” for the C=C bond, by Boehm et al. in 1986. The synthesis of graphene can be done using various methods. The synthesized graphene was further oxidized to graphene oxide (GO) using different methods, to enhance its multitude of applications. Graphene oxide (GO) is the oxidized analogy of graphene, familiar as the only intermediate or precursor for obtaining the latter at a large scale. Graphene oxide has recently obtained enormous popularity in the energy, environment, sensor, and biomedical fields and has been handsomely exploited for water purification membranes. GO is a unique class of mechanically robust, ultrathin, high flux, high-selectivity, and fouling-resistant separation membranes that provide opportunities to advance water desalination technologies. The facile synthesis of GO membranes opens the doors for ideal next-generation membranes as cost-effective and sustainable alternative to long existing thin-film composite membranes for water purification applications. Many types of GO–metal oxide nanocomposites have been used to eradicate the problem of metal ions, halomethanes, other organic pollutants, and different colors from water bodies, making water fit for further use. Furthermore, to enhance the applications of GO/metal oxide nanocomposites, they were deposited on polymeric membranes for water purification due to their relatively low-cost, clear pore-forming mechanism and higher flexibility compared to inorganic membranes. Along with other applications, using these nanocomposites in the preparation of membranes not only resulted in excellent fouling resistance but also could be a possible solution to overcome the trade-off between water permeability and solute selectivity. Hence, a GO/metal oxide nanocomposite could improve overall performance, including antibacterial properties, strength, roughness, pore size, and the surface hydrophilicity of the membrane. In this review, we highlight the structure and synthesis of graphene, as well as graphene oxide, and its decoration with a polymeric membrane for further applications.

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Section: General Methods Of Graphene Synthesismentioning

confidence: 99%

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

et al. 2022

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“…Hence, ultrasonication is used to exfoliate graphitic oxide into graphene oxide, as indicated in Figs. 7 and 8 [48] . In summary, the efficiency of the exfoliated graphene nanosheets relies on the sonication time, temperature, liquid medium and the power of the sonication.…”

Section: Sonicationmentioning

confidence: 99%

“…The Georgia Institute of Technology initiated this study of graphene electronics: they started and presented a serious pursuit on epitaxial graphene for graphene-based electronics. The method allows that the graphitization temperature to be regulated [48] .…”

Section: Epitaxial Growth On Sicmentioning

confidence: 99%

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Graphene synthesis, fabrication, characterization based on bottom-up and top-down approaches: An overview

Olatomiwa¹,

Adam²,

Gopinath³

et al. 2022

J. Semicond.

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This study presents an overview on graphene synthesis, fabrication and different characterization techniques utilized in the production. Since its discovery in 2004 by Andre Geim and Kostya Novoselov several research articles have been published globally to this effect, owing to graphene’s extraordinary, and exclusive characteristics which include optical transparency, excellent thermal, and mechanical properties. The properties and applications of this two-dimensional carbon crystal composed of single-layered material have created new avenues for the development of high-performance future electronics and technologies in energy storage and conversion for the sustainable energy. However, despite its potential and current status globally the difficulty in the production of monolayer graphene sheet still persists. Therefore, this review highlighted two approaches in the synthesis of graphene, which are the top-down and bottom-up approaches and examined the advantages and failings of the methods involved. In addition, the prospects and failings of these methods are investigated, as they are essential in optimizing the production method of graphene vital for expanding the yield, and producing high-quality graphene.

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“…Cell capacitance is best determined from the galvanostatic or constant current (CC) discharge curves using Equation (10) [ 20 ].

…”

Section: Materials and Preparationmentioning

confidence: 99%

Natural Solid-State Hydrogel Electrolytes Based on 3D Pure Cotton/Graphene for Supercapacitor Application

et al. 2023

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A conductive cotton hydrogel with graphene and ions can come into contact with electrodes in solid electrolytes at the molecular level, leading to a more efficient electrochemical process in supercapacitors. The inherently soft nature of cotton mixed with hydrogel provides superior flexibility of the electrolyte, which benefits the devices in gaining high flexibility. Herein, we report on the current progress in solid-state hydrogel electrolytes based on 3D pure cotton/graphene and present an overview of the future direction of research. The ionic conductivity of a complex hydrogel significantly increased by up to 13.9 × 10−3 S/cm at 25 °C, due to the presence of graphene, which increases ionic conductivity by providing a smooth pathway for the transport of charge carriers and the polymer. Furthermore, the highest specific capacitance of 327 F/g at 3 mV/s was achieved with cyclic voltammetry measurement and a galvanostatic charge–discharge measurement showed a peak value of 385.4 F/g at 100 mA/g current density. Furthermore, an electrochemical analysis demonstrated that a composite cotton/graphene-based hydrogel electrolyte is electrically stable and could be used for the design of next-generation supercapacitors.

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Graphene Synthesis by Ultrasound Energy-Assisted Exfoliation of Graphite in Various Solvents

Cited by 15 publications

References 52 publications

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

Graphene synthesis, fabrication, characterization based on bottom-up and top-down approaches: An overview

Natural Solid-State Hydrogel Electrolytes Based on 3D Pure Cotton/Graphene for Supercapacitor Application

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