Carbon nanotube in different shapes

Zhang, Mei; Li, Jian

doi:10.1016/s1369-7021(09)70176-2

Cited by 249 publications

(145 citation statements)

References 94 publications

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“…Most probably this is due to the particular rubber and additive formulation of the car tyre compared with the truck tyre. CNTs have several different structures, including for example, straight, coiled, waved, branched and entangled CNTs (Karthikeyan and Mahalingam, 2013;Sears et al, 2010;Zhang and Li, Figure 5 have been proposed for use in water and air purification applications (Karthikeyan and Mahalingam, 2013;Sears et al, 2010). In relation to the TPO results shown in Figure 3, Li et al (2004) have also suggested that the weight loss in relation to carbon oxidation at temperatures <600°C may also be due to oxidation of single-walled CNTs as they are less thermally stable compared with multi-walled CNTs, stability arising from the strong interaction between graphite layers in multi-walled CNTs.…”

Section: Carbon Formationmentioning

confidence: 99%

High-value resource recovery products from waste tyres

Zhang

Nahil

et al. 2016

Proceedings of the Institution of Civil Engineers - Waste and R

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A novel process has been developed which enables the production of high-value carbon nanotubes (CNTs) and hydrogen-rich syngas from the two-stage pyrolysis-catalysis of waste tyres. The waste tyre samples originated from truck tyres and from car tyres. In addition, three of the main rubber elastomers used in tyre manufacture, polybutadiene rubber, styrene-butadiene rubber and natural rubber, were also investigated. The waste car tyres produced a syngas yield of 30·2 wt%, which was composed largely of hydrogen (53·8 vol%) with a calorific value of 18·8 MJ/m 3 . Increasing the tyre:catalyst ratio increased the yield of hydrogen. The component rubber elastomers produced much higher yields of syngas and hydrogen gas concentration. The carbon deposited on the catalyst during reaction was found to be mostly composed of graphitic CNTs. Changing the process conditions in terms of tyre:catalyst ratio could increase the yield of the carbon deposited on the catalyst to up to 14 wt%.

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Section: Carbon Formationmentioning

confidence: 99%

High-value resource recovery products from waste tyres

Zhang

Nahil

et al. 2016

Proceedings of the Institution of Civil Engineers - Waste and R

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“…Although straight CNTs, including single walled CNTs (SWCNTs) and multi walled CNTs (MWCNTs) were commonly observed, different shapes of CNTs such as coiled, branched, and toroidal were reported [5] shortly after their discovering by Iijima [6]. It has been demonstrated that the nanostructure of CNTs can strongly affected the characteristic properties of different shapes of CNTs, so it can limit their applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Template on the Structure of Carbon Nanotubes Grown by Catalytic Chemical Vapor Deposition Method

Hekmat¹,

Sohrabi²,

Rahmanifar³

2017

Mod Chem Appl

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Carbon nanotubes (CNTs) have been synthesized on an anodized aluminum oxide (AAO) template with acetylene by using catalytic chemical vapor deposition (CVD). It was found that the structure of CNTs can be mostly depends on the quality of the catalyst deposition in the pores of AAO template. Straight CNTs were observed when Ni catalyst deposited only in the bottom of holes as nanoparticles, but when Ni catalyst fulfilled the holes of AAO template as nanowires (NWs), coiled CNTs observed. The characterization of as-prepared materials was examined by SEM and Raman spectroscopy. In addition, it is realized that the nanostructure of the AAO template strongly affected the properties of as-grown CNTs. In the other word, based on the obtained results the diameter and pitch of coiled CNTs tightly depend on the size of metallic catalyst and in the results it depend on the pore diameter of AAO template.

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“…As the latter terms suggest, it seems like a carbon nanotube (CNT) which has been coiled into a helixshaped structure. 1 The main difference between CNC and CNT, beyond their overall geometry, is the existence of pentagons and heptagons, in addition to hexagons, in a CNC, compared to a CNT which is, in perfect structure, solely composed of hexagons. In CNC structure, the pentagons provide positive Gaussian curvature while the heptagons provide negative Gaussian curvature.…”

Section: Introductionmentioning

confidence: 99%

Elastic behavior of carbon nanocoils: A molecular dynamics study

Zaeri

Ziaei-Rad

2015

AIP Advances

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Elastic behavior of carbon nanocoils is investigated through molecular dynamics simulations. In particular, spring constants of various nanocoils are derived. To do so, first a geometric model is prepared with the aid of finite element mesh generator. Then applying AIREBO potential, the model is simulated under tensile loading. Using the obtained deformation data, the spring constant is calculated. In order to study the effect of structural parameters, change of elastic properties with helix diameter as well as tube diameter is examined. The results are compared to those obtained via other methods reported in literature.

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Carbon nanotube in different shapes

Cited by 249 publications

References 94 publications

High-value resource recovery products from waste tyres

High-value resource recovery products from waste tyres

Effect of Template on the Structure of Carbon Nanotubes Grown by Catalytic Chemical Vapor Deposition Method

Elastic behavior of carbon nanocoils: A molecular dynamics study

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