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A scalable CVD synthesis of high-purity single-walled carbon nanotubes with porous MgO as support material
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In this article, the authors found that porous MgO prepared by thermal decomposition of its salts was an eminent support material for CVD growth of single-walled carbon nanotubes (SWNTs).Abstract:
The choice of support and catalyst materials has been proved to be critical to scalable chemical vapor deposition (CVD) synthesis of carbon nanotubes In our study, we found that porous MgO prepared by thermal decomposition of its salts was an eminent support material for CVD growth of single-walled carbon nanotubes (SWNTs) Compared with other kinds of supports such as SiO2, ZrO2, Al2O3 and CaO etc, the quality of as-grown SWNTs on MgO supports was stable; the effects of reaction conditions such as furnace temperature, flow rate of the gas and the types of catalysts and supports on the properties of as-prepared SWNT products were thoroughly investigated and characterized by micro-Raman spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and thermogravimetry (TG) techniques The results indicated that the yields of SWNTs on MgO supports could be up to about 120%
with the addition of a small amount of assistant catalyst Mo salt The obtained purity of the as-grown products was higher than 90% after treatment with 4 M HCl The obvious advantages of using MgO supports include efficient and stable growth of SWNTs, scalable synthesis of SWNTs at low cost, and easy removal of the support in mild acid, causing little harm to the productsread more
Citations
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Science and Technology of the Twenty-First Century: Synthesis, Properties, and Applications of Carbon Nanotubes
TL;DR: In this paper, the authors reviewed the discovery, synthesis, properties, and the latest research advances of carbon nanotubes developed over the past 12 years, and concluded that further experimental and theoretical research is still necessary so that novel technologies will become a reality in the early twenty-first century.
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From dead leaves to high energy density supercapacitors
Mandakini Biswal,Mandakini Biswal,Abhik Banerjee,Abhik Banerjee,Meenal Deo,Meenal Deo,Satishchandra Ogale,Satishchandra Ogale +7 more
TL;DR: In this article, a functional microporous conducting carbon with a high surface area of about 1230 m2 g−1 is synthesized by single-step pyrolysis of dead plant leaves (dry waste, ground powder) without any activation and studied for supercapacitor application.
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Methane decomposition to COx-free hydrogen and nano-carbon material on group 8–10 base metal catalysts: A review
TL;DR: In this paper, a review of the recent advances in the reaction mechanism and kinetics on group 8-10 base metal catalysts is presented, with special attention paid to the roles of metal particles and the deactivation mechanism of the catalyst during the reaction.
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Synthesis of carbon nanotubes by catalytic chemical vapour deposition: A review on carbon sources, catalysts and substrates
Khurshed A. Shah,Bilal A. Tali +1 more
TL;DR: In this paper, the role of carbon sources, catalysts and substrates with regard to CCVD synthesis of carbon nanotubes is reviewed in light of latest developments and understandings in the field.
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Polyaniline/single-wall carbon nanotube (PANI/SWCNT) composites for high performance supercapacitors
Vinay Gupta,Norio Miura +1 more
TL;DR: In this paper, the PANI/SWCNT composites were prepared by electrochemical polymerisation of polyaniline onto SWCNTs and their capacitive performance was evaluated by means of cyclic voltammetry and charge-discharge cycling in 1M H 2 SO 4 electrolyte.
References
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Journal ArticleDOI
Helical microtubules of graphitic carbon
TL;DR: Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.
Journal ArticleDOI
Single-shell carbon nanotubes of 1-nm diameter
Sumio Iijima,Toshinari Ichihashi +1 more
TL;DR: In this article, the authors reported the synthesis of abundant single-shell tubes with diameters of about one nanometre, whereas the multi-shell nanotubes are formed on the carbon cathode.
Journal ArticleDOI
Crystalline Ropes of Metallic Carbon Nanotubes
Andreas Thess,R. S. Lee,Pavel Nikolaev,Hongjie Dai,Pierre Petit,J. Robert,Chunhui Xu,Young Hee Lee,Seong-Gon Kim,Andrew G. Rinzler,Daniel T. Colbert,Gustavo E. Scuseria,David Tománek,John E. Fischer,Richard E. Smalley +14 more
TL;DR: X-ray diffraction and electron microscopy showed that fullerene single-wall nanotubes (SWNTs) are nearly uniform in diameter and that they self-organize into “ropes,” which consist of 100 to 500 SWNTs in a two-dimensional triangular lattice with a lattice constant of 17 angstroms.
Journal ArticleDOI
Large-scale synthesis of carbon nanotubes
TL;DR: In this article, the authors used a variant of the standard arc-discharge technique for fullerene synthesis under a helium atmosphere, where a carbonaceous deposit formed on one of the graphite rods, consisting of a macroscopic (diameter of about 5 mm) cylinder.
Journal ArticleDOI
Single-wall nanotubes produced by metal-catalyzed disproportionation of carbon monoxide
Hongjie Dai,Andrew G. Rinzler,Pasha Nikolaev,Andreas Thess,Daniel T. Colbert,Richard E. Smalley +5 more
TL;DR: In this paper, isolated single-wall carbon nanotubes (SWNT) were grown by disproportionation of carbon monoxide at 1200°C, catalyzed by molybdenum particles a few nanometers in size.