Formation process and structure of graphite oxide

Nakajima, Tatsuo; Matsuo, Yoshiaki

doi:10.1016/0008-6223(94)90168-6

Cited by 404 publications

(208 citation statements)

References 10 publications

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“…The splitting of the (001) peak in the XRD pattern can be attributed to the fact that the carbon−carbon bonds go through an intermediate state when the carbon hybridization changes from sp 2 to sp 3 during the oxidation process. 30 With the increasing level of oxidation, G@GO shows a predominant peak at ∼11.8°, and the (002) peak becomes broader and shifts toward smaller angles (from ∼26.4 to ∼24.2°), indicating the destruction of the stacked graphitic structure. It is noted that the native graphite (002) peak persists for various oxidation levels, indicating the incomplete oxidation of the carbon fiber.…”

Section: Resultsmentioning

confidence: 95%

Facile Synthesis of Graphite-Reduced Graphite Oxide Core–Sheath Fiber via Direct Exfoliation of Carbon Fiber for Supercapacitor Application

Zhao

Liu

et al. 2014

ACS Appl. Mater. Interfaces

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A graphite-reduced graphite oxide (rGO) core−sheath structured fiber was synthesized through chemical exfoliation of graphitic carbon fiber. The graphitic carbon fiber was oxidized to form a graphite− graphite oxide core−sheath fiber and followed by thermal exfoliation to form a graphite−rGO core−sheath fiber. The core−sheath fiber with a three-dimensionally (3D) structured rGO sheath possesses a high surface area and pore size around 5.5 nm. A two-electrode supercapacitor constructed with this core−sheath fiber-based paper exhibited a high specific capacitance (140 F g −1 at a current density of 1 A g −1), high power density of 45 kW/kg, and good cycling stability (10% capacity loss after 3000 cycles). The surface area normalized capacitance reached as high as 59.4 μF cm −2 , indicating the effective use of surface area. The low equivalent series resistance value of 0.45 ohm in the Nyquist plot indicates an extremely small resistance between the graphite core and rGO sheet sheath. The hierarchical three-dimensional structure enables one to maximize the advantages of both graphite and rGO sheets. The 3D-structured rGO sheets sheath with regular pore structure is favorable for ion diffusion due to its interconnected porous system, while the graphite core provides an electron transport pathway with high conductivity.

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Section: Resultsmentioning

confidence: 95%

Facile Synthesis of Graphite-Reduced Graphite Oxide Core–Sheath Fiber via Direct Exfoliation of Carbon Fiber for Supercapacitor Application

Zhao

Liu

et al. 2014

ACS Appl. Mater. Interfaces

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“…Exfoliated graphite Micrograf HC-11 from Nacional do Grafite (Brazil) with median particle size of 10 µm (supplier data) was obtained via the well-known process of acid intercalation and posterior thermal expansion (EG-exfoliated graphite) [14] . All of the materials were used as received.…”

Section: Methodsmentioning

confidence: 99%

Morphological, viscoelastic and mechanical characterization of polypropylene/exfoliated graphite nanocomposites

Ferreira¹,

Bianchi²,

Oviedo³

et al. 2013

Polímeros

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Abstract:The viscoelastic, mechanical and morphological properties of polypropylene/exfoliated graphite nanocomposites with different contents of nanofiller were investigated. According to transmission electron microscopy results, the nanofiller particles were homogeneously dispersed in the matrix. The rheological properties indicated that incorporation of graphite improved the matrix stiffness and had a reinforcing effect. Exfoliated graphite had a weak interaction with the polypropylene. The behavior of the nanocomposites was similar to that of polypropylene in terms of the interfacial detachment inferred from the transmission electron microscopy images and of their G' (storage) and G'' (loss) moduli, and viscosity. The mechanical properties of the nanocomposites compared to the matrix improved significantly for the flexural and storage moduli with little loss of impact strength.

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“…Graphite oxide (GO), a derivative produced from graphite by oxidation in solution, can form various intercalation compounds with cationic molecules because of its functional groups on the surface such as carboxylic acid and hydroxyl group [1]. In recent years, some new porous graphite materials produced from intercalated graphite oxide (GO) by calcination (heating) have been reported: iron oxide pillared graphite having selectivity of gas adsorption [2], a pillared porous carbon produced through pyrolysis of silylated graphite oxide [3], exfoliated graphite oxides with colloidal titania [4], and so on.…”

Section: Articlementioning

confidence: 99%

“…Graphite oxide (GO) was prepared by oxidation of graphite powder (Wako Pure Chemical Industries, Ltd.) according to Brodie's method [1] using nitric acid and potassium chlorate. The composition of the GO was estimated to C 8 O 3.6 H 3.1 by elemental analysis.…”

Section: Articlementioning

confidence: 99%

The use of graphite oxide to produce mesoporous carbon supporting Pt, Ru, or Pd nanoparticles

Gotoh

Kawabata

Fujii

et al. 2009

Carbon

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Mesoporous carbon having platinum, ruthenium or palladium nanoparticles on exfoliated graphene sheets were produced from graphite oxide (GO) and metal complexes. The Pt included carbon was made by heating of the intercalation compound including tetraammineplatinum (II) chloride monohydrate. Samples having Ru or Pd are producible by heating in nitrogen gas atmosphere using hexaammineruthenium (III) chloride or

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Formation process and structure of graphite oxide

Cited by 404 publications

References 10 publications

Facile Synthesis of Graphite-Reduced Graphite Oxide Core–Sheath Fiber via Direct Exfoliation of Carbon Fiber for Supercapacitor Application

Facile Synthesis of Graphite-Reduced Graphite Oxide Core–Sheath Fiber via Direct Exfoliation of Carbon Fiber for Supercapacitor Application

Morphological, viscoelastic and mechanical characterization of polypropylene/exfoliated graphite nanocomposites

The use of graphite oxide to produce mesoporous carbon supporting Pt, Ru, or Pd nanoparticles

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