Synthesis of chemically bonded CNT–graphene heterostructure arrays

Rout, Chandra Sekhar; Kumar, Anurag; Fisher, Timothy S.; Gautam, Ujjal K.; Bando, Yoshio; Golberg, Dmitri

doi:10.1039/c2ra21443a

Cited by 37 publications

(22 citation statements)

References 36 publications

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“…Previously, we reported on the growth and characterization of this material [7][8][9]. Other groups have reported on CNT-graphene structures that share similarities with the present material [10][11][12][13], but have not examined the electron transfer kinetic properties of these hybrid materials for electrode applications. Herein, the electrode kinetics of g-CNTs are compared to that of CNTs.…”

Section: Introductionmentioning

confidence: 82%

Enhanced electron transfer kinetics through hybrid graphene-carbon nanotube films

Henry

Raut

Ubnoske

et al. 2014

Electrochemistry Communications

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We report the first study of the electrochemical reactivity of a graphenated carbon nanotube (g-CNT) film. The electron transfer kinetics of the ferri-ferrocyanide couple were examined for a g-CNT film and compared to the kinetics to standard carbon nanotubes (CNTs). The g-CNT film exhibited much higher catalytic activity, with a heterogeneous electron-transfer rate constant, k0, approximately two orders of magnitude higher than for standard CNTs. Scanning electron microscopy and Raman spectroscopy were used to correlate the higher electron transfer kinetics with the higher edge-density of the g-CNT film.

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Section: Introductionmentioning

confidence: 82%

Enhanced electron transfer kinetics through hybrid graphene-carbon nanotube films

Henry

Raut

Ubnoske

et al. 2014

Electrochemistry Communications

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“…Assembling graphene sheets into threedimensional interconnected porous micro-structures, namely, graphene aerogels has been considered the most effective approach to achieve a high specific capacitance [12][13][14]. To date, several graphene gelation principles have been developed, including self-assembly [15][16][17][18][19][20], template-assisted preparation [21][22][23][24][25][26][27][28] and direct deposition [29][30][31][32]. And the reduction of graphene oxide (GO) is promising in the preparation of supercapacitor electrodes [33].…”

Section: Introductionmentioning

confidence: 99%

Nickel skeleton three-dimensional nitrogen doped graphene nanosheets/nanoscrolls as promising supercapacitor electrodes

Wang

Zheng

et al. 2017

Nanotechnology

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A novel nickel skeleton 3D nitrogen doped graphene (N-GR/NF) superstructure with interconnected graphene nanosheets and nanoscrolls was synthesized using a facile two-step method. By varying the precursor concentration, the assembly of a graphene aerogel can be easily regulated, yielding different micro-structures and morphologies which accelerate the fast electron/ion transportation. The N-GR/NF composites demonstrate enhanced capacitance of 250 F g at 5 A g, good rate performance (237 F g at the current density of 12 A g) and cycle stability (90.9% retention after 5000 cycles) in 1 M KOH electrolyte. This study provides a new strategy for the microporous engineering of graphene gel, promising for further exploitation in various other applications.

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“…15 3DGNs are used in biosensors and gassensing devices, 16 biomedicine, 17 and catalysts. 18 3DGNs have been prepared through methods, such as self-assembly, 19 template-assisted preparation, 20 and direct deposition, 21 supercritical CO 2 fluid technique, 22 the freezing technique, 23 electrochemical approaches, 24 and sugar blowing. 25 Organic solvents are widely used in the furniture production, such as benzene, chlorobenzene, glycol ethers, methylene chloride, acetone, toluene, ethylbenzene, and xylenes.…”

Section: Introductionmentioning

confidence: 99%

3-D magnetic graphene balls as sorbents for cleaning oil spills

Tao

et al. 2019

Nanomaterials and Nanotechnology

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A 3-D magnetic graphene ball (MGB) material was prepared using cellulose as the carbon source. Carbon-encapsulated iron nanoparticles (CEINs) were first prepared by hydrothermal carbonization of cellulose powder at 180 C. Then, the prepared CEINs were catalytically graphitized to graphene-encapsulated iron nanoparticles (GEINs) at 900 C. Finally, GEINs were treated in carbon dioxide at 700 C, during which the iron core was oxidized to magnetite (Fe 3 O 4 ) nanoparticles, and graphene shells were peeled off from the iron cores to form graphene nanoplatelets. The graphene nanoplatelets consist of 1-10 layers graphene with the in-plane size of 20-30 nm. The prepared 3-D MGB was investigated for the removal of oil from water, which demonstrated outstanding adsorption performance and excellent recyclability.

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Synthesis of chemically bonded CNT–graphene heterostructure arrays

Cited by 37 publications

References 36 publications

Enhanced electron transfer kinetics through hybrid graphene-carbon nanotube films

Enhanced electron transfer kinetics through hybrid graphene-carbon nanotube films

Nickel skeleton three-dimensional nitrogen doped graphene nanosheets/nanoscrolls as promising supercapacitor electrodes

3-D magnetic graphene balls as sorbents for cleaning oil spills

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