The transformation of acetylene black into onion-like hollow carbon nanoparticles at 1000°C using an iron catalyst

Lian, Wentao; Song, Huaihe; Chen, Xiaohong; Li, Lixia; Huo, Junping; Zhao, Mingguo; Wang, Guanqun

doi:10.1016/j.carbon.2007.12.024

Cited by 88 publications

(71 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, graphite itself may result from the sluggish thermal graphitization process of organic matter, during asteroidal metamorphism, with or without the help of a metal catalyst (Berkley and Jones, 1982). These mechanisms are studied extensively in terrestrial rocks (maturation and graphitization during diagenesis and metamorphism; Jehlicka and Rouzaud, 1990;Oh et al, 1991;Wopenka and Pasteris, 1993;Beyssac et al, 2002) and experimental materials (Huo et al, 2007;Lian et al, 2008) and can thus be evaluated.…”

Section: Distorted Graphite Structure and Originmentioning

confidence: 98%

“…On possibility would then be the thermal graphitization of chondritic organic matter during an internal heating episode (Quirico et al, 2003;Bonal et al, 2006). A second hypothesis is a catalytic graphitization driven by iron, which has been invoked by Berkley and Jones (1982) and is known to be effective experimentally above 1000°C (Huo et al, 2007;Lian et al, 2008).…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Structures, origin and evolution of various carbon phases in the ureilite Northwest Africa 4742 compared with laboratory-shocked graphite

Guillou

Rouzaud

Rémusat

et al. 2010

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

International audienceMineralogical structures of carbon phases within the ureilite North West Africa 4742, a recent find, are investigated at various scales by high-resolution transmission electron microscopy (HRTEM), Raman microspectrometry and X-ray diffraction. Ureilites are the most carbon-rich of all meteorites, containing up to 6 wt.% carbon. Diamond, graphite and so-called "amorphous carbon" are typically described, but their crystallographic relationships and respective thermal histories remain poorly constrained. We especially focus on the origin of "amorphous carbon" and graphite, as well as their relationship with diamond. Two aliquots of carbon-bearing material were extracted: the insoluble organic matter (IOM) and the diamond fraction. We also compare the observed structures with those of laboratory-shocked graphite. Polycrystalline diamond aggregates with mean coherent domains of about 40 nm are reported for the first time in a ureilite and TEM demonstrates that all carbon phases are crystallographically related at the nanometre scale. Shock features show that diamond is produced from graphite through a martensitic transition. This observation demonstrates that graphite was present when the shock occurred and is consequently a precursor of diamond. The structure of what is commonly described as the "amorphous carbon" has been identified. It is not completely amorphous but only disordered and consists of nanometre-sized polyaromatic units surrounding the diamond. Comparison with laboratory-shocked graphite, partially transformed into diamond, indicates that the disordered carbon could be the product of diamond post-shock annealing. As diamond is the carrier of noble gases, whereas graphite is noble gas free, graphite cannot be the sole diamond precursor. This implies a multiple-stage history. A first generation of diamond could have been synthesized from a noble gas rich precursor or environment by either a shock or a condensation process. Thermally-induced graphitization of chondritic-like organic matter could have produced the graphite, which was then transformed by shock processes into polycrystalline nanodiamond aggregates. The formation of the disordered carbon occurred by diamond post-shock back-transformation during post-shock heating. The noble gases in the first generation diamond could then be incorporated directly into the disordered carbon during the transformation

show abstract

Section: Distorted Graphite Structure and Originmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Structures, origin and evolution of various carbon phases in the ureilite Northwest Africa 4742 compared with laboratory-shocked graphite

Guillou

Rouzaud

Rémusat

et al. 2010

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

show abstract

“…Nevertheless, Lian et al [16] reported that when a catalyst is introduced and fully mixed with CB, catalytic graphitization of amorphous carbon into concentric graphitic layers occurs even at relatively low temperatures. Lian et al carried out this transformation process in ten hours at 1000°C in a horizontal electric furnace.…”

Section: Introductionmentioning

confidence: 98%

“…[3][4][5][6][7]. Nanotubes are also synthesized using solid carbon as source (such as C 60 , graphite, carbon black (CB)) [8][9][10][11][12][13][14][15][16][17][18]. This type of solid phase synthesis uses either high temperature without a catalyst or relatively low temperature with metal.…”

Section: Introductionmentioning

confidence: 99%

“…Nano-sized iron-group metals (such as Fe, Ni and Co) are well known for their catalytic activity in the synthesis of CNTs [20,[22][23][24][25][26]. These metals have unique interaction with carbon materials since the d-orbitals of the transition metal and the p-orbitals of carbon tend to overlap easily and are known to show the highest ability of carbon diffusion [16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Pt and Fe catalysts in the transformation of carbon black into carbon nanotubes

Asokan

Myrseth

Kosinski

2015

Journal of Physics and Chemistry of Solids

View full text Add to dashboard Cite

a b s t r a c tIn this research carbon nanotubes and carbon nano onion-like structures were synthesized from carbon black using metal catalysts at 400°C and 700°C. Platinum and iron-group metals were used as catalysts for the transformation of CB into graphitized nanocarbon and the effect of both metals was compared. The synthesized products were characterized using X-ray diffraction (XRD), transmission electron microscope (TEM), high resolution transmission electron microscope (HRTEM) and Raman spectroscopy. The characterization shows that this process is very efficient in the synthesis of high quality graphitized products from amorphous carbon black, even though the process temperature was relatively low in comparison with previous studies. Distinguished graphitic walls of the newly formed carbon nanostructures were clearly visible in the HRTEM images. Possible growth difference related to the type of catalyst used is briefly explained with the basis of electron vacancies in d-orbitals of metals.

show abstract

Carbon Nano Onions

Echegoyen

Ortiz

Chaur

et al. 2010

Chemistry of Nanocarbons

View full text Add to dashboard Cite

The transformation of acetylene black into onion-like hollow carbon nanoparticles at 1000°C using an iron catalyst

Cited by 88 publications

References 23 publications

Structures, origin and evolution of various carbon phases in the ureilite Northwest Africa 4742 compared with laboratory-shocked graphite

Structures, origin and evolution of various carbon phases in the ureilite Northwest Africa 4742 compared with laboratory-shocked graphite

Effect of Pt and Fe catalysts in the transformation of carbon black into carbon nanotubes

Carbon Nano Onions

Contact Info

Product

Resources

About