X-ray Diffraction Patterns of Thermally-reduced Graphenes

Huh, Seung Hun; Ju, Hae-Mi; Choi, Seongho

doi:10.3938/jkps.57.1649

Cited by 108 publications

(17 citation statements)

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“…After magnesiothermic denitriding, the obtained ND-g-C 3 N 4 exhibits a broad peak at around 23°, indicating the transformation of g-C 3 N 4 into nitrogen-doped carbon materials with a low degree of graphitization. 22 In addition, a sharp diffraction peak around 25.84°that is comparable to the (002) reflection of graphite was recorded, demonstrating a layered structure. It is worth noting that this peak shows a left-shift phenomenon comparing to that of graphite, suggesting a few-layer graphene structure.…”

Section: Resultsmentioning

confidence: 92%

Nitrogen-Deficient Graphitic Carbon Nitride with Enhanced Performance for Lithium Ion Battery Anodes

et al. 2017

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Graphitic carbon nitride (g-CN) behaving as a layered feature with graphite was indexed as a high-content nitrogen-doping carbon material, attracting increasing attention for application in energy storage devices. However, poor conductivity and resulting serious irreversible capacity loss were pronounced for g-CN material due to its high nitrogen content. In this work, magnesiothermic denitriding technology is demonstrated to reduce the nitrogen content of g-CN (especially graphitic nitrogen) for enhanced lithium storage properties as lithium ion battery anodes. The obtained nitrogen-deficient g-CN (ND-g-CN) exhibits a thinner and more porous structure composed of an abundance of relatively low nitrogen doping wrinkled graphene nanosheets. A highly reversible lithium storage capacity of 2753 mAh/g was obtained after the 300th cycle with an enhanced cycling stability and rate capability. The presented nitrogen-deficient g-CN with outstanding electrochemical performances may unambiguously promote the application of g-CN materials in energy-storage devices.

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Section: Resultsmentioning

confidence: 92%

Nitrogen-Deficient Graphitic Carbon Nitride with Enhanced Performance for Lithium Ion Battery Anodes

et al. 2017

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“…According to Ju et al [30], thermally-reduced graphenes showed a broad (002) peak at 2θ = 23°~26° [30,31]. However, in our case, the Gr diffraction peaks are mostly shielded by hydroxyapatite peaks, since the strong diffraction peak for the hydroxyapatite crystal plane (002) is evident at 2θ = 26.0°.…”

Section: Xrd Raman and Ft-ir Analysismentioning

confidence: 46%

Electrochemical synthesis of nanosized hydroxyapatite/graphene composite powder

Mišković‐Stanković¹,

Eraković²,

Jankovic³

et al. 2015

Carbon letters

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Electrochemical synthesis was employed to prepare a novel hydroxyapatite/graphene (HAP/ Gr) composite powder suitable for medical applications as a hard tissue implant (scaffold). The synthesis was performed in a homogeneous dispersion containing Na 2 H 2 EDTA·2H 2 O, NaH 2 PO 4 and CaCl 2 with a Ca/EDTA/PO 4 3− concentration ratio of 0.25/0.25/0.15M, along with 0.01 wt% added graphene nanosheets, at a current density of 137 mA cm −2 and pH value of 9.0. The field emission scanning electron microscopy and transmission electron microscopy observations of the composite HAP/Gr powder indicated that nanosized hydroxyapatite particles were uniformly placed in the graphene overlay. Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray diffraction confirmed graphene incorporation in the HAP/Gr powder. The electrochemically prepared HAP/Gr composite powder exhibited slight antibacterial effect against the growth of the bacterial strain Staphylococcus aureus.

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“…It can be seen that graphene layers form perfect domains in which the stacking direction is normal to the sheet plane, and that the inter-sheet separation is 3.4 Å , exactly the same as that for multilayer graphene. 15,16 However, we note that in the center window, domain (d), the stacking direction is tilted 5.5 with respect to the sheet planes in domains (b) and (f). In the transition regions between these domains, as shown in Figs.…”

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confidence: 89%

Stacking fault induced tunnel barrier in platelet graphite nanofiber

Lan

Chang

et al. 2014

Applied Physics Letters

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A correlation study using image inspection and electrical characterization of platelet graphite nanofiber devices is conducted. Close transmission electron microscopy and diffraction pattern inspection reveal layers with inflection angles appearing in otherwise perfectly stacked graphene platelets, separating nanofibers into two domains. Electrical measurement gives a stability diagram consisting of alternating small-large Coulomb blockade diamonds, suggesting that there are two charging islands coupled together through a tunnel junction. Based on these two findings, we propose that a stacking fault can behave as a tunnel barrier for conducting electrons and is responsible for the observed double-island single electron transistor characteristics.

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X-ray Diffraction Patterns of Thermally-reduced Graphenes

Cited by 108 publications

References 0 publications

Nitrogen-Deficient Graphitic Carbon Nitride with Enhanced Performance for Lithium Ion Battery Anodes

Nitrogen-Deficient Graphitic Carbon Nitride with Enhanced Performance for Lithium Ion Battery Anodes

Electrochemical synthesis of nanosized hydroxyapatite/graphene composite powder

Stacking fault induced tunnel barrier in platelet graphite nanofiber

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