Graphite‐to‐Graphene: Total Conversion

Buzaglo, Matat; Bar, Ilana; Varenik, Maxim; Shunak, Liran; Pevzner, Svetlana; Regev, Oren

doi:10.1002/adma.201603528

Cited by 133 publications

(140 citation statements)

References 28 publications

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“…To protect the structural integrity of 2D crystals, buffers are added to reduce the momentum of the grinding body during ball milling . For instance, Buzaglo et al have shown that aromatic reagents with higher conjugation degree leads to graphene sheets with high quality . In addition, by adding active ingredients appropriate media during ball milling, functional 2D crystals can be achieved.…”

Section: Preparation Of 2d Crystal–based Fibersmentioning

confidence: 99%

“…[27,171] For instance, Buzaglo et al have shown that aromatic reagents with higher conjugation degree leads to graphene sheets with high quality. [172] In addition, by adding active ingredients appropriate media during ball milling, functional 2D crystals can be achieved. For example, Jeon and co-workers used 2M NaOH as additives during milling and ultrasonicating h-BN, and obtained dispersions of 2D h-BN with hydroxyl groups.…”

Section: Mass Production Of 2d Crystals and Their Dispersions By Exfomentioning

confidence: 99%

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2D Crystal–Based Fibers: Status and Challenges

Meng

Kong

et al. 2019

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2D crystals are emerging new materials in multidisciplinary fields including condensed state physics, electronics, energy, environmental engineering, and biomedicine. To employ 2D crystals for practical applications, these nanoscale crystals need to be processed into macroscale materials, such as suspensions, fibers, films, and 3D macrostructures. Among these macromaterials, fibers are flexible, knittable, and easy to use, which can fully reflect the advantages of the structure and properties of 2D crystals. Therefore, the fabrication and application of 2D crystal–based fibers is of great importance for expanding the impact of 2D crystals. In this Review, 2D crystals that are successfully prepared are overviewed based on their composition of elements. Subsequently, methods for preparing 2D crystals, 2D crystals dispersions, and 2D crystal–based fibers are systematically introduced. Then, the applications of 2D crystal–based fibers, such as flexible electronic devices, high‐efficiency catalysis, and adsorption, are also discussed. Finally, the status‐of‐quo, perspectives, and future challenges of 2D crystal–based fibers are summarized. This Review provides directions and guidelines for developing new 2D crystal–based fibers and exploring their potentials in the fields of smart wearable devices.

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Section: Preparation Of 2d Crystal–based Fibersmentioning

confidence: 99%

Section: Mass Production Of 2d Crystals and Their Dispersions By Exfomentioning

confidence: 99%

2D Crystal–Based Fibers: Status and Challenges

Meng

Kong

et al. 2019

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“…The approach to produce graphene via ball milling has been widely investigated. [28][29][30][31][32][33][34][35] Baek's group found that edge-functionalized graphene nanoplatelets could be prepared by dry ball milling in the presence of hydrogen, carbon dioxide, or sulfur trioxide which acts as an electrocatalyst for the oxygen reduction reaction. 28,29 Salt such as sodium chloride or sodium sulfate is added to facilitate the delamination of graphite.…”

Section: Mechanochemical Reaction Of Graphitementioning

confidence: 99%

“…36,37 To avoid this problem, a protective agent such as naphthalene, pyrene, melamine, or ammonia gas is introduced during ball milling. [32][33][34][35] Although these additives help produce high-quality FLG, the thickness is usually not uniform and the milled powder can only be dispersed in NMP, DMF, or a water/surfactant solution.…”

Section: Mechanochemical Reaction Of Graphitementioning

confidence: 99%

Mass production of low-boiling point solvent- and water-soluble graphene by simple salt-assisted ball milling

et al. 2019

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Developing a mass production method for graphene is essential for practical usage of this remarkable material. Direct exfoliation of graphite in a liquid is a promising approach for production of high quality graphene. However, this technique has three huge obstacles to be solved; limitation of solvent, low yield and low quality (i.e., multilayer graphene with a small size). Here, we found that soluble graphite produced by mechanochemical reaction with salts overcomes the above three drawbacks. Soluble graphite was exfoliated into monolayer graphene with more than 10% yield in five minutes of sonication.The modified graphite was easily exfoliated in a low-boiling point solvent such as acetone, alcohol and water without the aid of a surfactant. Molecular simulation revealed that the salt is adsorbed to the active carbon at the graphite edge. In the case of weak acid salts, the original bonding nature between the alkali ion and the base molecule is retained after the reaction. Thus, alkali metals are easily dissociated in a polar solvent, leading to negative charge of graphene, enabling the exfoliation of graphite in low boiling point solvents. The approach proposed here opens up a new door to practical usage of the attractive 2D material.

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“…Thus, the carbon family consists of each dimensional material: fullerene in zero dimensions [5]; carbon nanotube in one dimension [6]; graphene in two dimensions (2D); and graphite in three dimensions (3D). Graphene, a one-atom thick layer of sp 2 hybridized carbon atoms arranged into hexagonal crystal, has been a topic of interest in nano-science due to its excellent properties and the prospect of industrial applications [7][8][9][10]. Owning to its unique structure, the charge carrier mobility of graphene exceeds 2.0 × 10 5 cm 2 ·V −1 ·s −1 at room temperature which is 100 times higher than that of silicon [11].…”

Section: Introductionmentioning

confidence: 99%

Thermal Growth of Graphene: A Review

2018

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A common belief proposed by Peierls and Landau that two-dimensional material cannot exist freely in a three-dimensional world has been proved false when graphene was first synthesized in 2004. Graphene, which is the base structure of other carbon materials, has drawn much attention of scholars and researchers due to its extraordinary electrical, mechanical and thermal properties. Moreover, methods for its synthesis have developed greatly in recent years. This review focuses on the mechanism of the thermal growth method and the different synthesis methods, where epitaxial growth, chemical vapor deposition, plasma-enhanced chemical vapor deposition and combustion are discussed in detail based on this mechanism. Meanwhile, to improve the quality and control the number of graphene layers, the latest research progress in optimizing growth parameters and developmental technologies has been summarized. The strategies for synthesizing high-quality and large-scale graphene are proposed and an outlook on the future synthesis direction is also provided.

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Graphite‐to‐Graphene: Total Conversion

Cited by 133 publications

References 28 publications

2D Crystal–Based Fibers: Status and Challenges

2D Crystal–Based Fibers: Status and Challenges

Mass production of low-boiling point solvent- and water-soluble graphene by simple salt-assisted ball milling

Thermal Growth of Graphene: A Review

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