Synthesis conditions of carbon nanotubes with the chemical vapor deposition method

Dobrzańska-Danikiewicz, A.; Cichocki, D.; Pawlyta, Mirosława; Łukowiec, Dariusz; Wolany, W.

doi:10.1002/pssb.201451178

Cited by 14 publications

(14 citation statements)

References 9 publications

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“…The growth of the nanotubes was controlled in an oven at a temperature of 750 • C for 45 minutes using ethylene (C 2 H 4 ) as a source of carbon. Details concerning the synthesis process of carbon nanotubes are described in the author's another work [18]. Fig.…”

Section: Methodsmentioning

confidence: 99%

The MWCNTs-Rh Nanocomposite Obtained By The New High-Temperature Method

Dobrzańska-Danikiewicz¹,

Cichocki²,

Łukowiec³

2015

Archives of Metallurgy and Materials

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A nanocomposite was fabricated during the research undertaken, consisting of multiwalled carbon nanotubes coated with rhodium nanoparticles by the new high-temperature method being the subject of the patent claim. High quality multiwalled carbon nanotubes (MWCNTs) with the length of 100÷500 nm and the diameter of 8÷20 nm obtained in advance with Catalytic Chemical Vapour Deposition (CVD) were employed in the investigations. The nanotubes manufactured under the own research contain small amounts of metallic impurities and amorphous carbon deposits. Multiwalled carbon nanotubes functionalisation in acids was applied to deposit rhodium nanoparticles onto the surface of carbon nanotubes, and then the material was placed in a solution being a precursor of rhodium nanoparticles. The material prepared was next placed in a quartz vessel and subjected to high-temperature reduction in the atmosphere of argon to deposit rhodium nanoparticles onto the surface of multiwalled carbon nanotubes. The following examinations were performed, respectively: MWCNTs fabrication, fabrication of a CNT-NPs (Carbon NanoTube-NanoParticles) nanocomposite material; the characterisation of the materials produced including examination of the structure and morphology, and the assessment of rhodium nanoparticles distribution on the surface of carbon nanotubes. Microand spectroscopy techniques were employed to characterise the structure of the nanocomposites obtained.Keywords: carbon nanotubes, nanocomposite materials, rhodium nanoparticles, transmission electron microscopy W ramach wykonanych badań wytworzono nanokompozyt składający się z wielościennych nanorurek węglowych pokrytych nanocząsteczkami rodu nową wysokotemperaturową metodą, będącą przedmiotem zgłoszenia patentowego. W badaniach wykorzystano wysokiej jakości wielościenne nanorurki węglowe MWCNTs o długości 100÷500 nm i średnicy 8÷20 nm uprzednio otrzymane w procesie katalityczno-chemicznego osadzania z fazy gazowej (CCVD). Wytworzone w ramach prac własnych nanorurki zawierają nieznaczne ilości zanieczyszczeń metalicznych i amorficznych depozytów węglowych. W celu osadzenia nanocząsteczek rodu na powierzchni nanorurek węglowych zastosowano funkcjonalizację wielościennych nanorurek węglowych w kwasach, następnie materiał umieszczono w roztworze będącym prekursorem nanocząsteczek rodu. Przygotowany materiał umieszczono w dalszej kolejności w kwarcowym naczyniu i poddano redukcji wysokotemperaturowej w atmosferze argonu w celu osadzenia nanocząsteczek rodu na powierzchni wielościennych nanorurek węglowych. Wykonane badania obejmują kolejno: wytworzenie MWCNTs, wytworzenie materiału nanokompozytowego typu nanorurki węglowe -nanocząsteczki (CNT-NPs), scharakteryzowanie wytworzonego materiału obejmujące badanie jego struktury i morfologii oraz ocenę rozmieszczenia nanocząsteczek rodu na powierzchni nanorurek węglowych. Dla scharakteryzowania struktury otrzymanych nanokompozytów zastosowano techniki mikro-i spektroskopowe.

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Section: Methodsmentioning

confidence: 99%

The MWCNTs-Rh Nanocomposite Obtained By The New High-Temperature Method

Dobrzańska-Danikiewicz¹,

Cichocki²,

Łukowiec³

2015

Archives of Metallurgy and Materials

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“…Carbon nanotubes are characterised by good mechanical, thermal and electric properties, unlike any others, i.e., engineering materials known to date [13,14]. Carbon nanotubes, since they have been manufactured, have become the object of extensive investigations of many research institutions around the globe.…”

Section: Overview Of Applications Of Halloysite and Carbon Nanotubes mentioning

confidence: 99%

Fabrication, Composition, Properties and Application of the AlMg1SiCu Aluminium Alloy Matrix Composite Materials Reinforced with Halloysite or Carbon Nanotubes

Dobrzański¹,

Tomiczek²,

Macek³

2017

Powder Metallurgy - Fundamentals and Case Studies

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In this chapter, the characterisation of the halloysite nanotubes (HNTs) and multiwalled carbon nanotubes (MWCNTs) as the reinforcement in the composite materials was described. The original and author technology of production of the aluminium AlMg1SiCu matrix composite materials reinforced with halloysite or carbon nanotubes using powder metallurgy techniques, including mechanical alloying and hot extrusion and the range of own research in the case to determine microstructure, as well as mechanical properties of those materials was present. It was investigated that the addition of carbon and halloysite nanotubes causes a significant improvement in mechanical properties of the obtained nanocomposites. The investigation results show that the technology used in manufacturing nanocomposite materials can find the practical application in the production of new light metal matrix nanocomposites.

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“…The applicability of nanocomposites with interesting electrical properties, structure and, most of all, a highly developed specific surface, created by combining carbon nanotubes with Pt nanocrystals as an active surface of sensors of industrial gases, is an interesting research aspect for the authors [37][38][39]. This publication presents…”

Section: Introductionmentioning

confidence: 99%

MWCNT-Pt nanocomposite as the active element of harmful gas sensors

Dobrzańska-Danikiewicz¹,

Łukowiec²,

Wolany³

et al. 2016

Archives of Materials Science and Engineering

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Purpose: The goal of this paper is presentation of the variations in MWCNTs-Pt nanocomposite resistance which were examined in the presence of hydrogen with a rising concentration of, respectively, 1, 2, 3 and 4% H 2 as well as nitrogen dioxide with a rising concentration of, respectively, 20, 100, 200, 400 ppm of NO 2 . Design/methodology/approach: Variations in electrical conductivity for the MWCNTs-Pt composite placed, alternately, in the atmosphere of gas and in the atmosphere of selected gases, were measured with a measuring station equipped with precision and inert gas reducers, mass flow meters, filtration systems of gas mixture and the studied mixture's humidity and temperature control. An active layer of the transducer consisted of MWCNTs-Pt nanocomposite deposited thereon. All the measurements were carried out in the atmosphere of synthetic air (20% of O2 and 80% of N 2 ) at 22.5°C. Findings: It was found based on the results obtained that system resistance is rising as hydrogen concentration is rising in the atmospheric air. The results of analogous examinations of variations in MWCNTs-Pt nanocomposite resistance carried out for a varying concentration of nitrogen dioxide in the atmosphere of synthetic air are opposite, because lowering system resistance was noted along with a heightening concentration of NO 2 . The best results were achieved for the nanocomposite presented in the article having a 5% mass concentration of platinum and with uniformly dispersed Pt particles on the surface of carbon nanoparticles. Practical implications: The outcomes presented signify the selectiveness of the applied system consisting of carbon nanotubes decorated with platinum nanoparticles. It means that this material can be used as the active element of harmful gas sensors. Originality/value: A carbon-metal MWCNTs-Pt nanocomposite with special electrical properties was fabricated in the course of research works, whose originality is based on the appropriately selected composition and the specific morphology.

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Synthesis conditions of carbon nanotubes with the chemical vapor deposition method

Cited by 14 publications

References 9 publications

The MWCNTs-Rh Nanocomposite Obtained By The New High-Temperature Method

The MWCNTs-Rh Nanocomposite Obtained By The New High-Temperature Method

Fabrication, Composition, Properties and Application of the AlMg1SiCu Aluminium Alloy Matrix Composite Materials Reinforced with Halloysite or Carbon Nanotubes

MWCNT-Pt nanocomposite as the active element of harmful gas sensors

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