Non-catalytic CVD preparation of carbon spheres with a specific size

Qian, Haisheng; Han, Fengmei; Zhang, Bing; Guo, Yanchuan; Yue, Jun; Peng, Bo

doi:10.1016/j.carbon.2004.01.004

Cited by 170 publications

(91 citation statements)

References 21 publications

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“…[1][2][3][4][5][6][7][8][9][10][11] Until now, various methods have been applied for the preparation of homogeneous carbon spheres; ultrasonic treatment, chemical vapor deposition, carbon-arc technique, and pyrolysis of carbon sources followed by hydrothermal method.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for the Fabrication of Monodispersed Carbon Nanospheres and Their Crosslinked Forms

Im¹,

Lee²,

Li³

et al. 2014

Bulletin of the Korean Chemical Society

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Monodispersed carbon nanospheres (CNSs) were fabricated by a novel method and their structural properties were investigated. CNSs were prepared by the pyrolysis of nanospherical polystyrenes (PS). With the coating of SiO 2 shell, PS particles were effectively separated during pyrolysis process which resulted to CNSs with an average diameter of 40 nm. Moreover, CNSs could be crosslinked with each other through the bondings between the functional groups on their surfaces. Morphology of the fabricated carbon spheres and their crosslinked form were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and fourier transform infrared spectroscopy (FT-IR).

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Section: Introductionmentioning

confidence: 99%

A Novel Method for the Fabrication of Monodispersed Carbon Nanospheres and Their Crosslinked Forms

Im¹,

Lee²,

Li³

et al. 2014

Bulletin of the Korean Chemical Society

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“…This observation suggests that the metal and g-C 3 N 4 /AC formed a chemical complex (M-N) [13], which is consistent with the TEM mapping results. The two obvious characteristic peaks for AC at 2θ = 24.4 • and 43.7 • in Figure 2b, corresponding to the (002) and (101) crystal planes [14]. Moreover, the broad peaks for the g-C 3 N 4 /AC catalysts were positively shifted when g-C 3 N 4 was thoroughly dispersed on the support surface.…”

Section: Catalytic Performancementioning

confidence: 75%

The Preparation of Cu-g-C3N4/AC Catalyst for Acetylene Hydrochlorination

Zhao

Dai

2016

Catalysts

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Abstract:A novel catalyst based on g-C 3 N 4 /activated carbon was prepared by adding CuCl 2 . The catalytic performance of the as-prepared catalyst was investigated in the acetylene hydrochlorination reaction. X-ray photoelectron spectroscopy, temperature programmed desorption, low temperature N 2 adsorption/desorption (Brunauer-Emmett-Teller), and thermal gravity analysis showed that Cu-g-C 3 N 4 /AC significantly enhanced the catalytic performance of the original catalyst by increasing the relative pyrrolic N content. Cu-g-C 3 N 4 /AC also affected the adsorption of hydrogen chloride and acetylene, as well as inhibited the coke deposition during acetylene hydrochlorination.

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“…0.80, showing a higher degree of graphitization (lower I D /I G ) than most of the other CVD carbon spheres reported to date. 10,33,37,38 Lower I D /I G ratios can be achieved in the presence of MnO 2 or Ni doping. 39,40 In any case, our results are in accordance with the graphitization trend reported by Nieto-Márquez et al: graphite 4 carbon nanotubes/nanofibers 4 carbon nanospheres 4 activated carbon.…”

Section: Resultsmentioning

confidence: 99%

CVD synthesis of carbon spheres using NiFe-LDHs as catalytic precursors: structural, electrochemical and magnetoresistive properties

et al. 2016

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The gram-scale synthesis of carbon spheres with a diameter of ca. 740 nm has been achieved by means of a chemical vapour deposition method using NiFe-layered double hydroxides as a solid catalytic precursor. The presence of the catalyst (FeNi 3 ) allows controlling the final size distribution, resulting in a monodisperse sample. Their structural properties exhibited a high degree of graphitization according to their I D /I G ratio. In addition, their morphological features were unveiled by FIB-SEM and HRTEM, showing that they are formed by solid inner cores, and presenting labile chain-like structures due to accretion procedures. The solution and posterior sonication of the samples in toluene gave rise to the well-defined isolated spheres. The textural and electrochemical properties of the spheres have been tested showing non-mesoporous structures with a good behaviour as electrode materials for supercapacitors due to the presence of redox functionalities on their surface. Finally, magneto-transport measurements have been carried out, demonstrating semiconductor behaviour, as well as a positive magnetoresistance effect (ca. 72%) for the lowest studied temperature (2 K).

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Non-catalytic CVD preparation of carbon spheres with a specific size

Cited by 170 publications

References 21 publications

A Novel Method for the Fabrication of Monodispersed Carbon Nanospheres and Their Crosslinked Forms

A Novel Method for the Fabrication of Monodispersed Carbon Nanospheres and Their Crosslinked Forms

The Preparation of Cu-g-C3N4/AC Catalyst for Acetylene Hydrochlorination

CVD synthesis of carbon spheres using NiFe-LDHs as catalytic precursors: structural, electrochemical and magnetoresistive properties

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