Carbon Nanotubes Synthesis via Arc Discharge with a Yttria Catalyst

Mohammad, M. R.; Moosa, Ahmed A.; Potgieter, Johan; Ismael, Mustafa K.

doi:10.1155/2013/785160

Cited by 24 publications

(16 citation statements)

References 22 publications

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“…Currently, the synthesis of CNTs is based on the methods of thermal plasma [17], chemical vapor deposition (CVD) [18] and arc discharge [19]: Tian et al [14] were the first to develop a thermal plasma method for obtaining multi-walled CNTs (MWCNTs) from coal, the second one based on the thermal decomposition of carbon-containing gases (chemical vapor deposition), accompanied by gas-phase chemical deposition (GPCD) of crystalline nanocarbon on metal catalysts. The third method of synthesis consists in the evaporation of graphite and the subsequent condensation of the product when the vapor is cooled in an arc discharge.…”

Section: Issn 2224-5286mentioning

confidence: 99%

Synthesis of Carbon Nanotubes by the Electric Arc-Discharge Method

Yermagambet¹,

Казанкапова²,

Muratbekovna³

et al. 2020

OF THE ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN

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The paper presents the synthesis of carbon nanotubes (CNTs) by the method of electric arc-discharge. To obtain CNTs, the process of an electric arc-discharge of graphite was carried out; the current strength at a constant voltage of 50 V was 120, 150, 170, 200 A (inert medium - argon). Using the methods of electron microscopy, BET and Raman scattering, the chemical composition, specific surface area were determined, and the surface morphology of the obtained samples was studied. The results of determining the specific surface area and pore volume show that with increasing current strength, the specific surface area and specific pore volume increase from 25.450 to 159.737 m2/g and from 0.011 cm3/g to 0.068 cm3/ g, respectively. Electron microscopic images show CNT particles with a diameter of 58 to 370 nm, which are rolled into a single, seamless, cylindrical shape.

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Section: Issn 2224-5286mentioning

confidence: 99%

Synthesis of Carbon Nanotubes by the Electric Arc-Discharge Method

Yermagambet¹,

Казанкапова²,

Muratbekovna³

et al. 2020

OF THE ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN

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“…As shown in Figure 4, in this method, a carbon-metal composition is placed in a heated chamber with a flow of argon at 500 Torr with a flow rate of 50 sccm (standard cubic centimeters per minute). The laser beam is focused on the target, and the soot produced by the laser was deposited onto a cooled copper collector (Figure 4B) [31]. …”

Section: Carbon Nanotubesmentioning

confidence: 99%

“…Additionally, the CNT yield and quality depended on the reaction temperature with the best result at 1200°C. The quality of the CNTs diminished and lots of defects appeared at lower temperatures [31,32]. …”

Section: Carbon Nanotubesmentioning

confidence: 99%

Carbon nanotubes part I: preparation of a novel and versatile drug-delivery vehicle

Karimi

Solati

Amiri

et al. 2015

Expert Opinion on Drug Delivery

102

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Introduction It is 23 years since carbon allotrope known as carbon nanotubes (CNT) was discovered by Iijima, who described them as “rolled graphite sheets inserted into each other”. Since then, CNTs have been studied in nanoelectronic devices. However, CNTs also possess the versatility to act as drug- and gene-delivery vehicles. Areas covered This review covers the synthesis, purification and functionalization of CNTs. Arc discharge, laser ablation and chemical vapor deposition are the principle synthesis methods. Non-covalent functionalization relies on attachment of biomolecules by coating the CNT with surfactants, synthetic polymers and biopolymers. Covalent functionalization often involves the initial introduction of carboxylic acids or amine groups, diazonium addition, 1,3-dipolar cycloaddition or reductive alkylation. The aim is to produce functional groups to attach the active cargo. Expert opinion In this review, the feasibility of CNT being used as a drug-delivery vehicle is explored. The molecular composition of CNT is extremely hydrophobic and highly aggregation-prone. Therefore, most of the efforts towards drug delivery has centered on chemical functionalization, which is usually divided in two categories; non-covalent and covalent. The biomedical applications of CNT are growing apace, and new drug-delivery technologies play a major role in these efforts.

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“…This method has been intensively studied in the last decades with the main focus on the high‐yield production of CNTs with elevated quality. Several routes have been developed to make the EA synthesis simple, reproducible, and with a good cost‐benefit 9‐13 …”

Section: Introductionmentioning

confidence: 99%

Ecofriendly synthesis of MWCNTs by electric arc in aqueous medium: Comparative study of 6B pencil and mineral graphite

Kaufmann

Zampiva

Arcaro

et al. 2020

Int J Applied Ceramic Tech

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The production of carbon nanotubes (CNTs) by electric arc discharge (EA) usually applies pure mineral graphite (PMG) as the precursor electrode due to its high‐purity and conductivity. This work investigated the versatility of EA in aqueous medium for the production of CNTs by varying the electrodes purity degree. In this way, a variety of domestic and industrial graphite waste can be recycled into high‐quality CNTs by adjusting the EA parameters. CNTs were synthesized using 6B pencil (6BP, ~57% graphite) and their quality and quantity were compared to the PMG (99.995%) production. PMG led to short CNTs (ID/IG 0.266), while the synthesis with 6BP led to long CNTs (ID/IG 0.428). The 6BP CNTs showed elevated quality for application in the electronic, biomedical, and optical fields.

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Carbon Nanotubes Synthesis via Arc Discharge with a Yttria Catalyst

Cited by 24 publications

References 22 publications

Synthesis of Carbon Nanotubes by the Electric Arc-Discharge Method

Synthesis of Carbon Nanotubes by the Electric Arc-Discharge Method

Carbon nanotubes part I: preparation of a novel and versatile drug-delivery vehicle

Ecofriendly synthesis of MWCNTs by electric arc in aqueous medium: Comparative study of 6B pencil and mineral graphite

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