Carbon spheres

Deshmukh, Amit A.; Mhlanga, Sabelo D.; Coville, Neil J.

doi:10.1016/j.mser.2010.06.017

Cited by 331 publications

(211 citation statements)

References 244 publications

Supporting

Mentioning

202

Contrasting

Unclassified

Order By: Relevance

“…Another possibility is its role in the modification and deposition of carbon radicals which are formed in the gas phase, i.e., helping the decomposition of the carbon source instead of the polymerization reaction. 9 The XRPD spectrum in CS was recorded in order to study the graphitic structure of the sample. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…[5][6][7][8] Recently, Deshmukh et al reviewed different techniques employed for the synthesis of CS, pointing out chemical vapour deposition (CVD) as one of the most versatile synthetic approaches. 9 These carbonaceous forms show a wide range of potential applications due to their thermal stability, electronic properties, high surface area or low density. Furthermore, their unclosed graphitic flakes give rise to dangling bonds throughout the surface of the spheres, increasing their reactivity and boosting their applicability in adsorption, lubricants, tribological coatings, catalysis, batteries, supercapacitors or fuel cells among others.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2016

View full text Add to dashboard Cite

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).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

show abstract

“…They include balls, spheres, microbeads, carbon blacks, onions and mesoporous micro-beads (Caldero-Moreno et al, 2005;Deshmukh et al, 2010). The spheres and balls can be hollow or solid and in this Chapter, spheres and balls will mean the same thing.…”

Section: Carbon Nanoballsmentioning

confidence: 99%

“…reactor used and the process conditions (Deshmukh et al, 2010). The CVD is simple, flexible and allows high specificity of single wall or multi wall nanotubes through appropriate selection of process parameters, e.g., metal catalysts, reaction temperature and flow rate of feed stock (Nolan et al, 1995;Agboola et al, 2007;Moisala et al, 2006).…”

mentioning

confidence: 99%

Synthesis of Carbon Nanomaterials in a Swirled Floating Catalytic Chemical Vapour Deposition Reactor for Continuous and Large Scale Production

Iyuke¹,

Simate²

2011

Carbon Nanotubes - Growth and Applications

View full text Add to dashboard Cite

“…98 Currently, not only have colloidal N doped carbon NPs been reported, N doped carbon nanospheres with various morphology such as hollow, mesoporous, coreshell and yolk-shell carbonaceous spheres have also been achieved. [143][144][145][146] It is worth to note that the N content in carbonaceous framework has been well controlled by adjusting precursors, pyrolysis temperatures and reaction efficiency. Currently, heteroatom doped mesoporous carbon spheres via soft template are still rarely reported.…”

Section: 140mentioning

confidence: 99%

Design, synthesis and applications of functional carbonaceous nanospheres

Yang¹

View full text Add to dashboard Cite

Carbon nanoparticles have gained considerable attention due to their distinguishing features including hydrophobic, conducting and thermostable properties. Other features include the fine control over the ductile properties, porosity, and surface area of the nanoparticles. These features allow the nanoparticles to be designed for applications in drug and vaccine delivery, nanoreactors for catalytic reactions, electrode material for energy storage and conversion.With the advance in new synthetic techniques, carbon nanoparticles can now be designed with control over the particles morphology, which include microporous, mesoporous, hollow, core-shell and yolk-shell structures. However, due to the inert nature of carbon, there remains a great challenge to prepare carbon nanoparticles not only with a desired morphology and porosity, but with desired functionality. Accomplishing this will provide a powerful synthetic methodology to prepare the next generation of carbon nanoparticles, improving on the many known applications and possibly generate new technologies. This thesis aims to develop highly effective and facile methods to prepare carbon nanoparticles with not only controlled morphology and porosity, but producing composite nanoparticles (e.g. heteroatom-doping and metal nanoparticle inclusion) and greater surface functionality. The additional features have provided the design capability to develop better supercapacitors and nanocatalysts.The first aspect discussed in this thesis is the development of monodisperse Ag@carbon coreshell nanospheres by an extended Stöber method. The synthetic method is based on the the similarity between the organic sol-gel of resorcinol/formaldehyde (RF) resins and silicate solgel process. This important finding represents a unique method to make carbon nanoparticles with morphologies similar to that found with silica. In particular, the well-know Stöber method is extended to enable the preparation of Ag, AgBr@RF core-shell nanospheres, which after being carbonized under N 2 gas produced Ag@carbon core-shell nanospheres. The shape and thickness of the shell can be tuned by simply adjusting the synthesis parameters.The simple one-pot route can be extended to the preparation of core-shell spheres with other metals/metal oxides as cores. The rattle-type Ag, AgBr@meso-SiO 2 and yolk-shell structured Ag@carbon@meso-SiO 2 have been selectively synthesized by calcinations of double layered Ag, AgBr@RF@meso-SiO 2 under air or nitrogen respectively. This synthesis approach is considered to be low cost and more suitable for industrial production. Because of the II tunability and functionality of both cores and shells, these complex core-shell and yolk-shell spheres have the potential application as nanocatalysts, which have been confirmed by our preliminary photocatalysis study.The second aspect discussed in this thesis is the design and synthesis of N-doped mesoporous carbon nanosphere (N-MCN) via a dual surfactants soft template method for fuel cell applications. Here, the technique...

show abstract

Carbon spheres

Cited by 331 publications

References 244 publications

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

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

Synthesis of Carbon Nanomaterials in a Swirled Floating Catalytic Chemical Vapour Deposition Reactor for Continuous and Large Scale Production

Design, synthesis and applications of functional carbonaceous nanospheres

Contact Info

Product

Resources

About