Positive pressure assisted-arc discharge synthesis of single-walled carbon nanohorns

Nan, Yanli; Li, Bo; Zhang, Peng; Shen, Sicong; Song, Xiaolong

doi:10.1016/j.matlet.2016.05.100

Cited by 18 publications

(10 citation statements)

References 16 publications

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“…To confirm this speculation, the comparison experiment is established, decreasing the gas pressure can increase the diffusion rate based on the previous report. 29 Whereas, in 0.1 MPa Ar atmosphere the prepared production mainly focuses on the amorphous carbon, only retained a few tip-half closed CNHs as depicted in Fig. 2(h) .…”

Section: Resultsmentioning

confidence: 96%

“…5(a) and the growth mechanism for the traditional CNHs can be summarized as following. 29 The graphite of anode can be sublimated into the C atoms and small carbon clusters above 5500 K; during 3000–5000 K, the small carbon clusters and carbon atoms get together to form the graphene sheets; then CNHs are formed by the curled graphene sheets into the during 2000–3000 K. The result confirmed that by controlling the duration of graphene sheets and carbon clusters at 2000–3000 K is the critical parameter for synthesis the traditional tip-closed CNHs.…”

Section: Resultsmentioning

confidence: 99%

“…CNHs were prepared by direct-current arc discharge in positive pressure as reported in previous research. 29 In this work, the reaction conditions are set up at 0.15 MPa in N 2 and Ar mixture atmosphere and 100 A electric current. In detail, an anode and a rod-shaped graphite cathode were set horizontally with 6 and 15 mm in diameter, 15 and 20 cm in length, respectively.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Controllable synthesis of N-doped carbon nanohorns: tip from closed to half-closed, used as efficient electrocatalysts for oxygen evolution reaction

Nan

Zhang

et al. 2021

RSC Adv.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Controllable synthesis of N-doped carbon nanohorns: tip from closed to half-closed, used as efficient electrocatalysts for oxygen evolution reaction

Nan

Zhang

et al. 2021

RSC Adv.

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“…The samples of raw CNHs were produced by improved arc discharge method. 46 One-step post-treatment for purification and tip-opening were carried out by air annealing. Then, the samples were filled by sulfur with a purity of 99.999% by means of thermal infusion (see details in the Supporting Information).…”

Section: ■ Experimental Methodsmentioning

confidence: 99%

Pressure and Photoinduced Phase Transitions of Elemental Sulfur Confined by Open-End Single-Wall Carbon Nanohorns

Nan

et al. 2018

J. Phys. Chem. C

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Confined molecules in tubular nanospaces of nanocarbons, for example, carbon nanotubes and nanohorns (CNHs), lead to extraordinary behavior and properties different from their bulk analogues. Here, we investigated the confinement effect of CNHs on high-pressure elastic and vibrational properties of sulfur via the diamond anvil cell technique. X-ray diffraction measurements up to 40 GPa demonstrate two phase transitions of S-I → amorphous → S-II. A fit of equation of state yields a bulk modulus of ∼24.8 GPa, about 70% higher than that of soft sulfur. Different from previous Raman studies, laser with red light wavelength (694.8 nm) and high laser density (∼2 mW μm–2) was employed under the threshold for generating C–S bonds. We observed a similar photoinduced transition of S-I to amorphous sulfur at 4–6 GPa compared to the results taken from blue and green light excitation and low laser density (e.g., <28 μW μm–2), showing enhanced photothermal stability of sulfur by the aid of single-wall CNHs.

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“…The use of catalytic particles leads to the growth of carbon nanotubes . Byproducts of the synthesis of carbon nanotubes include nanohorns . Using electric arc method, it is also possible to obtain graphene structures using special compositions of the working gas, which may include mixtures of hydrogen with He, Ar, N 2 , air or CO and even a mixture of O 2 ‐He .…”

Section: Introductionmentioning

confidence: 99%

Graphene, SiC and Si Nanostructures Synthesis During Quartz Pyrolysis in Arc‐Discharge Plasma

Зайковский

Kardash

Kolesov

et al. 2019

Physica Status Solidi (a)

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Composites based on graphene and nanosized silicon have recently been of interest in various applications. This paper reports a new method of synthesising a graphene-nano silicon composite material by spraying a mixture of quartz-graphite using an electric arc. The structure and composition of the materials obtained depends on the synthesis conditions. The quality of the graphene structure depends on the concentration of quartz in the load. Higher SiO 2 content leads to the production of more structured graphene. In this case, silicon is present in the materials in the form of carbide nanoparticles deposited on graphene planes. When sputtering pure quartz contained in the cavity of the graphite anode, silicon whiskers form during the synthesis process. The content of the silicon structure depends on the arc current and the sputtering rate of the anode material. The mechanisms that lead to the formation of the graphene structure and silicon whiskers in the condensation process of the products of the electric arc spraying of the anode material are considered.

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Positive pressure assisted-arc discharge synthesis of single-walled carbon nanohorns

Cited by 18 publications

References 16 publications

Controllable synthesis of N-doped carbon nanohorns: tip from closed to half-closed, used as efficient electrocatalysts for oxygen evolution reaction

Controllable synthesis of N-doped carbon nanohorns: tip from closed to half-closed, used as efficient electrocatalysts for oxygen evolution reaction

Pressure and Photoinduced Phase Transitions of Elemental Sulfur Confined by Open-End Single-Wall Carbon Nanohorns

Graphene, SiC and Si Nanostructures Synthesis During Quartz Pyrolysis in Arc‐Discharge Plasma

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