CVD synthesis of high-purity multiwalled carbon nanotubes using CaCO3 catalyst support for large-scale production

Couteau, E.; Hernádi, Klára; Seo, Jin Won; Thiên-Nga, L.; Mikó, C.; Gáal, R.; Forró, Lászlø

doi:10.1016/s0009-2614(03)01218-1

Cited by 241 publications

(133 citation statements)

References 32 publications

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“…Thus it is obvious that these two methods score too low on account of efficient use of energy and resources. The CVD method, incorporating catalyst-assisted thermal decomposition of hydrocarbons, is the most popular method of producing CNTs, and it is truly a low-cost and scalable technique for mass production of CNTs 5,6 . However, there are two weak points of the existing CVD-CNT technique: (i) it is a natural resourcedependent technique, because till date only purified petroleum products such as methane, ethylene, acetylene, benzene, xylene are in practice for synthesising CNTs and it is important to note that petrol cannot be generated but can only be exploited from the earth, and (ii) the CNT yield from these conventional precursors is not more than 25 per cent of the raw material used.…”

mentioning

confidence: 99%

Gigas Growth of Carbon Nanotubes

Kumar¹,

Ando²

2008

DSJ

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mentioning

confidence: 99%

Gigas Growth of Carbon Nanotubes

Kumar¹,

Ando²

2008

DSJ

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“…The temperatures at maximum weight loss appear at 600°C for the pristine MWCNT. The weight loss on the pristine MWCNT is correlated with the decomposition of MWCNT via oxidation, as the characteristic combustion temperature of disordered carbon usually emerges at around 400°C (Couteau et al 2003). Therefore, TGA could be a measure of the degree of functionalization of CNT (Dyke and Tour 2003).…”

Section: Ftir Analysismentioning

confidence: 99%

Cation exchange resin nanocomposites based on multi-walled carbon nanotubes

et al. 2012

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Carbon nanotubes (CNTs) are of great interest due to their potential applications in different fields such as water treatment and desalination. The increasing exploitation of multi-walled carbon nanotubes (MWCNTs) into many industrial processes has raised considerable concerns for environmental applications. The interactions of soluble salt with MWNCTs influence in the total salt content in saline water. In this work, we synthesized two cation exchange resins nano composites from polystyrene divinylbenzene copolymer (PSDVB) and pristine MWNCTs. The prepared compounds were characterized using infra red spectroscopy, thermal stability, X-ray diffraction, and electro scan microscope. Also, the ion capacities of prepared cation exchange resins were determined by titration. Based on the experimental results, it was found that the thermal stability of prepared nanocomposites in the presence of MWNCTs increased up to 617°C. The X-ray of PSDVB and its sulfonated form exhibits amorphous pattern texture structure, whereas the nano composite exhibits amorphous structure with indication peak at 20°and 26°for the PSDVB and MWCNTs, respectively. The ion-exchange capacity increased from 225.6 meq/100 g to 466 mg/100 g for sulfonated PSDVB and sulfonated PSDVB MWNCTs-pristine, respectively.

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“…MWCNTs were prepared by the decomposition of acetylene (CVD method) using a Fe, Co/CaCO 3 catalyst (Couteau et al, 2003;Magrez et al, 2010). This growth procedure using a CaCO 3 catalyst enables a highly efficient selective formation of clean MWCNTs, suitable for efficient bonding between CNT and metal oxide, particularly for SnO 2 precursors.…”

Section: Materials Preparationmentioning

confidence: 99%

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

Adamyan

Sayunts

Aroutiounian

et al. 2018

J. Sens. Sens. Syst.

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Abstract. The results of research works related to the study of thick-film multiwall carbon nanotube-tin oxide nanocomposite sensors of propylene glycol (PG), dimethylformamide (DMF) and formaldehyde (FA) vapors are presented in this paper. These sensors were derived using hydrothermal synthesis and sol-gel methods. Investigations of response-recovery characteristics in the 50-300 • C operating temperature range reveal that the optimal operating temperature for PG, DMF and FA vapor sensors, taking into account both high response and acceptable response and recovery times are about 200 and 220 • C, respectively. The dependence of the sensor response on gas concentration is linear in all cases. Minimal propylene glycol, dimethylformamide and formaldehyde gas concentrations, where the perceptible signal was noticed, were 13, 5 and 115 ppm, respectively.

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CVD synthesis of high-purity multiwalled carbon nanotubes using CaCO3 catalyst support for large-scale production

Cited by 241 publications

References 32 publications

Gigas Growth of Carbon Nanotubes

Gigas Growth of Carbon Nanotubes

Cation exchange resin nanocomposites based on multi-walled carbon nanotubes

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

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