Structure and formation process of carbon blacks formed by decomposing SiC powder using a conically converging shock-wave technique

Yamada, Kenjiro; Tobisawa, Shōtarō

doi:10.1016/0008-6223(89)90034-1

Cited by 31 publications

(10 citation statements)

References 13 publications

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“…The central magnetic field is 3300 G. Co and Ni) as catalysts. Large quantities of carbon spheres can be produced with these catalysts at temperature much lower than those described earlier [33][34][35][36]. There are five principal species within the Kaolin group, namely, kaolinite, dickite, nacrite, halloysite and metahalloysite [39][40][41].…”

Section: Discussionmentioning

confidence: 99%

“…These spheres have an average diameter of $210 nm. Carbon spheres with sizes of 1-10 lm were found in carbon black generated from the carbonization of polyethylene-poly-(vinyl chloride) in a sealed gold tube under a pressure of 30 MPa [35] and in carbon vapor from the decomposition of b-SiC powder [36]. Carbon spheres of 20-500 lm are found as a side product in the synthesis of fullerene by the deposition of gaseous carbon in flowing helium (33 mbar) at 2500-2600°C without catalysis [37].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and properties of carbon nanospheres grown by CVD using Kaolin supported transition metal catalysts

Miao

Hwang

Narasimhulu

et al. 2004

Carbon

145

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of carbon nanospheres grown by CVD using Kaolin supported transition metal catalysts

Miao

Hwang

Narasimhulu

et al. 2004

Carbon

145

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“…Added to this, there is a strong interest in producing small-scale materials for technological applications. [2] Before fullerenes, the most studied and well-characterized spherical carbon materials were carbon blacks, [3,4] and their properties found several industrial applications. [5] Different from fullerenes, the carbon spheres (CSs) have an internal structure constituted of numerous graphitic sheets that form mostly closed shells but also waving flakes whose open edges yield reaction sites located in the outer surface.…”

Section: Introductionmentioning

confidence: 99%

Influence of Iron Catalyst in the Carbon Spheres Synthesis for Energy and Electrochemical Applications

Scarselli

Limosani

Passacantando

et al. 2018

Adv Materials Inter

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Carbon spheres of nanometric dimension are known since the first studies on the synthesis of fullerenes. Their shape originates from the curvature of a carbon sheet similar to fullerenes, but with numerous graphitic rings that regulate the inside structure and the formation of open edges at the surface. This paper focuses on the structural and electronic characterization of carbon spheres obtained from a chemical vapor deposition synthesis process. Two different sets of samples are analyzed in detail, in particular, electron microscopies and Raman spectroscopy help understanding the morphology and the graphitic‐sp2 arrangement of the carbon atoms in the architectures. In addition, the iron catalyst used during the reaction process confers the carbon spheres a ferromagnetic response at room temperature. Therefore, both the structural properties of the samples and the active contribution of iron mark the difference in the measured photoresponse as well as in the electrochemical behavior. The X‐ray photoelectron spectroscopy study addresses these points by giving information on the composition and the iron chemical state in the assembly. The collected results underline the advantages offered by this nanomaterial for sustainable applications.

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“…In the 1980s, Inagaki et al 22 and Yamada et al 23 recognized the presence of carbon spherules during carbonization and shock-wave processes respectively. However, a targeted production of uniformly nano-sized carbon spheres is only now starting to attract a significant research effort.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanospheres: synthesis, physicochemical properties and applications

et al. 2011

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The discovery of carbon nanostructures, essentially carbon nanotubes (CNT) and carbon nanofibres (CNF) has led to a big effort devoted to their synthesis, characterization, surface modification and use. Indeed, these structures have encountered application in a wide range of technological fields, such as adsorption, catalysis, hydrogen storage or electronics. Apart from the filamentous arrange of graphene sheets conducting to CNT or CNF, carbon can bond in other different ways to create structures with dissimilar properties. The pairing of pentagonal and heptagonal carbon rings can result in the formation of carbon nanospheres (CNS). This novel nanostructure has only now started to attract significant research activity. In its spherical arrangement, the graphite sheets are not closed shells but rather waving flakes that follow the curvature of the sphere, creating many open edges at the surface. Contrary to the chemically inert C 60 , the unclosed graphitic flakes provide reactive ''dangling bonds'' that are proposed to enhance surface reactions, establishing CNS as good candidates for catalytic and adsorption applications. Despite the embryonic stage of the field and the existing data being too scattered, this work is aimed to provide a comprehensive review of the existing literature related to CNS, exploring the different preparation routes employed, the critical characterization results as well as the applications studied so far.

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Structure and formation process of carbon blacks formed by decomposing SiC powder using a conically converging shock-wave technique

Cited by 31 publications

References 13 publications

Synthesis and properties of carbon nanospheres grown by CVD using Kaolin supported transition metal catalysts

Synthesis and properties of carbon nanospheres grown by CVD using Kaolin supported transition metal catalysts

Influence of Iron Catalyst in the Carbon Spheres Synthesis for Energy and Electrochemical Applications

Carbon nanospheres: synthesis, physicochemical properties and applications

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