One-step synthesis of superior dispersion of chemically converted graphene in organic solvents

Phạm, Việt Hùng; Cường, Trần Việt; Nguyen‐Phan, Thuy‐Duong; Pham, Hai Dinh; Kim, Eui Jung; Hur, Seung Hyun; Shin, Eun Woo; Kim, Sunwook; Chung, Jin Suk

doi:10.1039/c0cc00363h

Cited by 170 publications

(77 citation statements)

References 23 publications

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“…[37][38][39] For example, the CCG prepared by the reduction of graphene oxide with phenylhydrazine is dispersible in various polar aprotic organic solvents such as N,N′-dimethylacetamide (DMAc), N,N'-dimethylformamide (DMF), propylene carbonate (PC), and 1-methyl-2-pyrrolidinone (NMP). The organic dispersions are stable at room temperature for at least 2 months.…”

Section: Structurementioning

confidence: 99%

Functional Composite Materials Based on Chemically Converted Graphene

2011

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Graphene, a one-atom layer of graphite, possesses a unique two-dimensional structure and excellent mechanical, thermal, and electrical properties. Thus, it has been regarded as an important component for making various functional composite materials. Graphene can be prepared through physical, chemical and electrochemical approaches. Among them, chemical methods were tested to be effective for producing chemically converted graphene (CCG) from various precursors (such as graphite, carbon nanotubes, and polymers) in large scale and at low costs. Therefore, CCG is more suitable for synthesizing high-performance graphene based composites. In this progress report, we review the recent advancements in the studies of the composites of CCG and small molecules, polymers, inorganic nanoparticles or other carbon nanomaterials. The methodology for preparing CCG and its composites has been summarized. The applications of CCG-based functional composite materials are also discussed.

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Section: Structurementioning

confidence: 99%

Functional Composite Materials Based on Chemically Converted Graphene

2011

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“…16,[56][57][58] The primary method of exfoliation of GO is ultrasonication in aqueous, 50 binary 59 or organic solvents; 51 however, spontaneous exfoliation of extra-large sheets of GO to form stable dispersions in different solvents has also been achieved. 2,3,52,56,58,60 Ogino et al 54 reported the exfoliation of graphite oxide in water without sonication. The authors used a new approach of rapid freezing of an aqueous solution containing graphite oxide and subsequent thawing of the resultant solid.…”

Section: Exfoliation Of Graphite Oxidementioning

confidence: 99%

“…Therefore, expanded graphite was found to be the best precursor for making GO containing large sheets. 52,60 The most common choice of intercalation compound is graphite bisulphate, which can be expanded along the c-axis via rapid thermal heating at 1050°C for 15 s. 3,16,56 This rapid heating, results in thermal decomposition of the intercalants into gaseous species that overcomes the van der Waals attractions and forces the carbon layers apart. During thermal expansion, the graphite expands up to~300 times along the c axis to transform the graphite platelets into worm shaped expanded graphite ( Figure 4).…”

Section: Thermal Expansion Of Intercalated Graphitementioning

confidence: 99%

Chemically converted graphene: scalable chemistries to enable processing and fabrication

et al. 2015

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Graphene, a nanocarbon with exceptional physical and electronic properties, has the potential to be utilized in a myriad of applications and devices. However, this will only be achieved if scalable, processable forms of graphene are developed along with ways to fabricate these forms into material structures and devices. In this review, we provide a comprehensive overview of the chemistries suitable for the development of aqueous and organic solvent graphene dispersions and their use for the preparation of a variety of polymer composites, materials useful for the fabrication of graphene-containing structures and devices. Fabrication of the processable graphene dispersions or composites by printing (inkjet and extrusion) or spinning methods (wet) is reviewed. The preparation and fabrication of liquid crystalline graphene oxide dispersions whose unique rheologies allow the creation of graphene-containing structures by a wide range of industrially scalable fabrication techniques such as spinning (wet and dry), printing (ink-jet and extrusion) and coating (spray and electrospray) is also reviewed.

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“…Addition of H 2 occurs across the alkenes, coupled with the extrusion of nitrogen gas, large excess of NaBH 4 have been used as a reducing agent [102]. Other reducing agents used include phenyl hydrazine [103], hydroxylamine [104], glucose, [105] ascorbic acid [106], hydroquinone [107], alkaline solutions [108], and pyrrole [109]. GO was formed by the chemical reaction between organic isocyanates and the hydroxyl is shown in Fig.…”

Section: Reduction Graphene Oxidementioning

confidence: 99%

Synthesis of graphene

et al. 2016

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Graphene, a two-dimensional material of sp 2 hybridization carbon atoms, has fascinated much attention in recent years owing to its extraordinary electronic, optical, magnetic, thermal, and mechanical properties as well as large specific surface area. For the tremendous application of graphene in nano-electronics, it is essential to fabricate high-quality graphene in large production. There are different methods of generating graphene. This review summarizes the exfoliation of graphene by mechanical, chemical and thermal reduction and chemical vapor deposition and mentions their advantages and disadvantages. This article also indicates recent advances in controllable synthesis of graphene, illuminates the problems, and prospects the future development in this field.

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One-step synthesis of superior dispersion of chemically converted graphene in organic solvents

Abstract: Chemically converted graphene that was reduced with phenylhydrazine was highly dispersed in organic solvents, and its "paper" prepared by filtration of the reduced graphene possessed an electrical conductivity value as high as 20,950 S m(-1).

Cited by 170 publications

References 23 publications

Functional Composite Materials Based on Chemically Converted Graphene

Functional Composite Materials Based on Chemically Converted Graphene

Chemically converted graphene: scalable chemistries to enable processing and fabrication

Synthesis of graphene

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