Solid-state microwave irradiation synthesis of high quality graphenenanosheets under hydrogen containing atmosphere

Park, Sang Hoon; Bak, Seong‐Min; Kim, Kwang Heon; Jegal, Jong Pil; Lee, Jun Young; Lee, Jae-Ho; Kim, Kwang Bum

doi:10.1039/c0jm01007c

Cited by 140 publications

(99 citation statements)

References 42 publications

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“…The electrical conductivity of as-prepared P-CNF was measured to be 1,283 S m −1 , whereas it decreased to 388 S m −1 for spine-like nanostructured carbon, presumably due to the partially exfoliated graphitic structure. However, the electrical conductivity of the spine-like nanostructured carbon is still higher than that of other graphene-based carbon materials such as the microwave-hydrothermally synthesized RGO reported previously by our group (277 S m −1 ) and the herringbone-type CNF (139 S m −1 , see Supplementary Figure S3)37. In contrast, the perfectly separated graphitic blocks prepared by the harsh exfoliation treatment (Figure 3d) show the lowest electrical conductivity (117 S m −1 ).…”

Section: Resultsmentioning

confidence: 56%

Spine-like Nanostructured Carbon Interconnected by Graphene for High-performance Supercapacitors

Park

Yoon

Kim

et al. 2014

Sci Rep

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Recent studies on supercapacitors have focused on the development of hierarchical nanostructured carbons by combining two-dimensional graphene and other conductive sp2 carbons, which differ in dimensionality, to improve their electrochemical performance. Herein, we report a strategy for synthesizing a hierarchical graphene-based carbon material, which we shall refer to as spine-like nanostructured carbon, from a one-dimensional graphitic carbon nanofiber by controlling the local graphene/graphitic structure via an expanding process and a co-solvent exfoliation method. Spine-like nanostructured carbon has a unique hierarchical structure of partially exfoliated graphitic blocks interconnected by thin graphene sheets in the same manner as in the case of ligaments. Owing to the exposed graphene layers and interconnected sp2 carbon structure, this hierarchical nanostructured carbon possesses a large, electrochemically accessible surface area with high electrical conductivity and exhibits high electrochemical performance.

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Section: Resultsmentioning

confidence: 56%

Spine-like Nanostructured Carbon Interconnected by Graphene for High-performance Supercapacitors

Park

Yoon

Kim

et al. 2014

Sci Rep

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“…Figure 2(b) shows the disordered mesoporous structure of MCGE, which might be due to the nonnitrile containing cation of EMIM-dca. Both carbon forms clearly show a very thin, 2D, flaky morphology containing folded and wrinkled sheets [26].…”

Section: Resultsmentioning

confidence: 99%

Sandwich-type ordered mesoporous carbon/graphene nanocomposites derived from ionic liquid

Kim

Roh

et al. 2016

Nano Res.

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Sandwich-type ordered mesoporous carbon/graphene nanocomposites were successfully synthesized using 2D ordered mesoporous silica/graphene nanocomposites as the hard template and an ionic liquid as a N-rich carbon source. We used an ionic liquid of 1-(3-cyanopropyl)-3-methylimidazolium dicyanamide containing nitrile groups (-CN) in the cation and anion as a carbon precursor for the preparation of the nanocomposites. Nitriles do not decompose under thermal treatment in an inert gas atmosphere, but leave significant amounts of N-rich carbon materials. The nanocomposites had a large surface area (1,316 m 2 ·g -1 ), an average pore diameter of 5.9 nm, and high electrical conductivity. The nanocomposite electrode showed a high specific capacitance of 190 F·g -1 at 0.5 A·g -1 in 1 M TEABF 4 /AN electrolyte and a good rate capability between 0 and 2.7 V for supercapacitor (or ultracapacitor) applications.

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“…However, as promising hybrid materials for photocatalysis, the exploration on semiconductor oxide photocatalyst-graphene composite is not nearly enough so far. Especially as an inexpensive, quick, versatile technique, microwave-assisted reaction is seldom employed to synthesize semiconductor oxide-reduced graphene oxide (RGO) hybrid composite materials for photocatalysis although such a method has been used successfully to fabricate RGO [35][36][37], ZnO [38][39][40] and TiO 2 [41].…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic degradation of methylene blue by ZnO-reduced graphene oxide composite synthesized via microwave-assisted reaction

Pan

Liu

et al. 2011

Journal of Alloys and Compounds

212

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Solid-state microwave irradiation synthesis of high quality graphenenanosheets under hydrogen containing atmosphere

Cited by 140 publications

References 42 publications

Spine-like Nanostructured Carbon Interconnected by Graphene for High-performance Supercapacitors

Spine-like Nanostructured Carbon Interconnected by Graphene for High-performance Supercapacitors

Sandwich-type ordered mesoporous carbon/graphene nanocomposites derived from ionic liquid

Enhanced photocatalytic degradation of methylene blue by ZnO-reduced graphene oxide composite synthesized via microwave-assisted reaction

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