Water-dispersible “carbon nanopods” with controllable graphene layer orientation

Li, Li Xiang; An, Bai Gang; Nishihara, Hirotomo; Shiroya, Toshifumi; Aikyo, Hiroyuki; Isojima, Tatsushi; Yamamoto, Masaki; Kyotani, Takashi

doi:10.1039/b904759j

Cited by 7 publications

(6 citation statements)

References 21 publications

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“…Müllen et al prepared carbon nanotubes with controllable graphene-layer orientation using anodic alumina membranes with open and separated straight channels as templates . Li et al fabricated carbon nanopods with the graphene layer orientation perpendicular/parallel to their long axis by simply changing synthesis conditions . However, from the literature available, the preparation of carbon fibers with the graphene layers perpendicular to the fiber axis needs complex synthesis conditions and is thus unfavorable for economical production in large-scale.…”

Section: Introductionmentioning

confidence: 99%

Simple Preparation of Carbon Nanofibers with Graphene Layers Perpendicular to the Length Direction and the Excellent Li-Ion Storage Performance

Tao

Cheng

et al. 2015

ACS Appl. Mater. Interfaces

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Sulfur-containing carbon nanofibers with the graphene layers approximately vertical to the fiber axis were prepared by a simple reaction between thiophene and sulfur at 550 °C in stainless steel autoclaves without using any templates. The formation mechanism was discussed briefly, and the potential application as anode material for lithium-ion batteries was tentatively investigated. The carbon nanofibers exhibit a stable reversible capacity of 676.8 mAh/g after cycling 50 times at 0.1 C, as well as the capacities of 623.5, 463.2, and 365.8 mAh/g at 0.1, 0.5, and 1.0 C, respectively. The excellent electrochemical performance could be attributed to the effect of sulfur. On one hand, sulfur could improve the reversible capacity of carbon materials due to its high theoretical capacity; on the other hand, sulfur could promote the formation of the unique carbon nanofibers with the graphene layers perpendicular to the axis direction, favorable to shortening the Li-ion diffusion path.

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Section: Introductionmentioning

confidence: 99%

Simple Preparation of Carbon Nanofibers with Graphene Layers Perpendicular to the Length Direction and the Excellent Li-Ion Storage Performance

Tao

Cheng

et al. 2015

ACS Appl. Mater. Interfaces

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“…They not only have a two-dimensional structure like graphene but also possess other properties totally different from graphene, such as hydrophilicity and controllable electronic properties. However, unless well separated from each other, as-prepared graphene sheets tend to form irreversible agglomerates or even restack to form graphite through van der Waals interactions [40][41][42][43]. Therefore, the addition of a dispersant which can bind tightly onto graphene sheets is necessary in order to achieve better dispersions of the graphene.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and application of Ag-chemically converted graphene nanocomposite

et al. 2010

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An in situ chemical synthesis approach has been employed to prepare an Ag-chemically converted graphene (CCG) nanocomposite. The reduction of graphene oxide sheets was accompanied by generation of Ag nanoparticles. The structure and composition of the nanocomposites were confirmed by means of transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray diffraction. TEM and AFM results suggest a homogeneous distribution of Ag nanoparticles (5-10 nm in size) on CCG sheets. The intensities of the Raman signals of CCG in such nanocomposites are greatly increased by the attached silver nanoparticles, i.e., there is surface-enhanced Raman scattering activity. In addition, it was found that the antibacterial activity of free Ag nanoparticles is retained in the nanocomposites, which suggests they can be used as graphene-based biomaterials.

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“…There are various types of porous carbons such as activated carbons, porous carbon blacks, carbon gels, [1][2][3][4][5][6][7] templated carbons, [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] carbide-derived carbons, [23] porous carbon frameworks derived from metal-organic frameworks [24][25][26][27] as well as organic crystals, [28][29][30] and ordered carbonaceous frameworks. [31][32][33][34][35] Representative porous carbons are activated carbons (Fig.…”

Section: Introductionmentioning

confidence: 99%

Adsorption properties of templated nanoporous carbons comprising 1–2 graphene layers

et al. 2022

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A variety of vapor adsorption (water, methanol, ethanol, dichloromethane, and n-hexane) is examined on templated nanoporous carbons consisting of 1-2 graphene layers including microporous zeolite-templated carbon (ZTC), mesoporous carbon mesosponge (CMS) and graphene mesosponge (GMS). Conventional nanoporous carbon materials are used as references. While water-vapor adsorption is peculiar because of the repulsion between H2O molecules and hydrophobic carbon, organic-vapor adsorption basically follows the mechanism of typical physisorption. The graphene-based nanoporous materials exhibit a noticeable degree of adsorption-induced expansion from their extraordinary softness except the case of inferior water-vapor adsorption on mesoporous CMS and GMS. CMS exhibits an especially large degree of adsorption-induced expansion, and achieved very high adsorption capacities up to 4.25-4.76 cm 3 g -1 for organic vapors, demonstrating its feasibility as a high-capacity adsorbent. The adsorption isotherms of ZTC at 278 K and 298 K for n-hexane are overlapping well, and it is advantageous for a new type of heat pump working with force-induced phase transition. Moreover, this work provides a general prediction of the ease of organic-vapor adsorption by the product of surface tension and molar volume.

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Water-dispersible “carbon nanopods” with controllable graphene layer orientation

Abstract: A pod-like form of a hollow nanocarbon "carbon nanopod" with controllable graphene layer orientation and good water-dispersibility has been synthesized with extremely high selectivity and without any impurities.

Cited by 7 publications

References 21 publications

Simple Preparation of Carbon Nanofibers with Graphene Layers Perpendicular to the Length Direction and the Excellent Li-Ion Storage Performance

Simple Preparation of Carbon Nanofibers with Graphene Layers Perpendicular to the Length Direction and the Excellent Li-Ion Storage Performance

Facile synthesis and application of Ag-chemically converted graphene nanocomposite

Adsorption properties of templated nanoporous carbons comprising 1–2 graphene layers

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