Synthesis of Filamentous Carbon Material via Decomposition of CF2Cl2 over Self-Organizing Ni-Cr Catalyst

The way to produce the nanostructured carbon filaments via H2-assisted catalytic decomposition of CF2Cl2 over self-organizing Ni-based catalyst has been reported. The self-organizing 6%Ni/CNM catalyst, where CNM is a carbon nanomaterial, resulted from carbon erosion of bulk Ni-Cr alloy (nichrome) in C2H4Cl2 vapors was also shown to be effective for catalytic chemical vapor deposition of CF2Cl2 with formation of bimodal carbon structures. It was demonstrated that interaction of nichrome with CF2Cl2/H2 reaction mixture at 600 °C leads to its rapid disintegration caused by carbon erosion to form disperse active Ni-particles catalyzing the growth of carbon filaments. The resulted filamentous carbon material is characterized with high textural parameters.

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Synthesis and Functionalization of Filamentous Carbon Material via Decomposition of 1,2-Dichlorethane over Self-Organizing Ni-Mo Catalyst

Materials Science Forum ◽

10.4028/www.scientific.net/msf.950.180 ◽

2019 ◽

Vol 950 ◽

pp. 180-184 ◽

Cited By ~ 1

Author(s):

Yurii Bauman ◽

Lidiya Kibis ◽

Ilya Mishakov ◽

Yuliya Rudneva ◽

Vladimir O. Stoyanovskii ◽

...

Keyword(s):

Raman Spectroscopy ◽

Textural Properties ◽

Catalytic Decomposition ◽

Structural Disorder ◽

Carbon Nanomaterial ◽

Mo Catalyst ◽

Filamentous Carbon ◽

Carbon Filaments ◽

Graphitic Material ◽

Self Organizing

Segmented carbon filaments produced by catalytic decomposition of 1,2-dichloroethane over Ni-Mo (8 wt.% Mo) self-organizing catalyst were subjected to functionalization in two different regimes. The structure, textural properties and chemical composition of surface were studied using SEM, Raman spectroscopy, adsorption (BET) and XPS. It was shown that oxidation of carbon nanomaterial in concentrated HNO3 results in enhancement of O-containing groups concentration (from 2.2 to 6.8 wt.%), increase in specific surface area (from 224 to 280 m2/g) and slight structural disorder of graphitic material (increase of ID/IG ratio from 2.15 to 1.84).

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Pyrolytic carbon filaments and associated catalytic particles formed in steel tubes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100113196 ◽

1984 ◽

Vol 42 ◽

pp. 662-663

Author(s):

Y. L. Chen ◽

J. R. Bradley

Keyword(s):

Stainless Steel ◽

Carbon Steel ◽

Catalyst Particle ◽

Pyrolytic Carbon ◽

Plain Carbon Steel ◽

304 Stainless Steel ◽

Hydrocarbon Gases ◽

Steel Tubes ◽

Filamentous Carbon ◽

Carbon Filaments

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.

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Micro-crystalline diamond and nano-carbon structures produced using a high argon concentration in hot-filament chemical vapor deposition

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.1366701 ◽

2001 ◽

Vol 19 (4) ◽

pp. 1057-1062 ◽

Cited By ~ 8

Author(s):

Vitor Baranauskas ◽

Alfredo C. Peterlevitz ◽

Helder J. Ceragioli ◽

Steven F. Durrant

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Chemical Vapor ◽

Carbon Structures ◽

Argon Concentration ◽

Nano Carbon ◽

Hot Filament

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Low Temperature Nitridatio of SiO2 Films using a Catalytic-CVD System

MRS Proceedings ◽

10.1557/proc-611-c4.5.1 ◽

2000 ◽

Vol 611 ◽

Author(s):

Akira Izumi ◽

Hidekazu Sato ◽

Hideki Matsumura

Keyword(s):

Chemical Vapor Deposition ◽

Low Temperature ◽

Silicon Dioxide ◽

Vapor Deposition ◽

Photoelectron Spectroscopy ◽

Chemical Vapor ◽

Catalytic Decomposition ◽

Catalytic Chemical Vapor Deposition ◽

Sio2 Films ◽

X Ray

ABSTRACTThis paper reports a procedure for low-temperature nitridation of silicon dioxide (SiO2) surfaces using species produced by catalytic decomposition of NH3 on heated tungsten in catalytic chemical vapor deposition (Cat-CVD) system. The surface of SiO2/Si(100) was nitrided at temperatures as low as 200°C. X-ray photoelectron spectroscopy measurements revealed that incorporated N atoms are bound to Si atoms and O atoms and located top-surface of SiO2.

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Thermal-CVD System Designed for Growth of Carbon Nanotubes

Volume 2: Automotive Systems, Bioengineering and Biomedical Technology, Fluids Engineering, Maintenance Engineering and Non-Destructive Evaluation, and Nanotechnology ◽

10.1115/esda2006-95721 ◽

2006 ◽

Author(s):

Samuele Porro ◽

Simone Musso ◽

Massimo Rovere ◽

Mauro Giorcelli ◽

Angelica Chiodoni ◽

...

Keyword(s):

Carbon Nanotubes ◽

Chemical Vapor ◽

Nitrogen Atmosphere ◽

Metal Catalyst ◽

Silicon Substrates ◽

Carbon Structures ◽

High Temperature Furnace ◽

Aligned Carbon Nanotubes ◽

Growth System ◽

Vertically Aligned

We report a study on a thermal chemical vapor deposition (CVD) system optimized for the growth of well packed and vertically aligned carbon nanotubes (CNTs) on uncoated silicon substrates. The process of synthesis involves the co-evaporation of a carbon precursor and a metal catalyst in a nitrogen atmosphere inside a high temperature furnace. Beside the formation of CNTs, depending in particular on the deposition temperature, other carbon structures can be deposited, such as nanographite. We show the growth results analyzed by different characterization techniques (electron microscopy, porosity and thermal stability investigations, micro-Raman spectroscopy). In addition, we report an investigation on the development of secondary transversal vortex flows caused by the effects of distribution of temperatures inside the growth system, in order to correlate them with the growth results.

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Catalytic conversion of 1,2-dichloroethane over Ni-Pd system into filamentous carbon material

Catalysis Today ◽

10.1016/j.cattod.2016.11.020 ◽

2017 ◽

Vol 293-294 ◽

pp. 23-32 ◽

Cited By ~ 15

Author(s):

Yurii I. Bauman ◽

Yuliya V. Shorstkaya ◽

Ilya V. Mishakov ◽

Pavel E. Plyusnin ◽

Yury V. Shubin ◽

...

Keyword(s):

Carbon Material ◽

Catalytic Conversion ◽

Filamentous Carbon

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Synthesis of Unique Structures of Carbon Nanotube at Anodic Aluminum Oxide Template

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.421.319 ◽

2013 ◽

Vol 421 ◽

pp. 319-323

Author(s):

Jafar Khan Kasi ◽

Ajab Khan Kasi ◽

Muzamil Bokhari ◽

Nitin Afzulpurkar

Keyword(s):

Carbon Nanotube ◽

Aluminum Oxide ◽

Anodic Aluminum Oxide ◽

Iron Catalyst ◽

Chemical Vapor ◽

Anodic Aluminum Oxide Template ◽

Multiwall Carbon Nanotube ◽

Anodic Aluminum ◽

Carbon Structures ◽

Potential Applications

Carbon nanotube (CNT) is one of the most attractive nanomaterials which may be used in many potential applications of nanotechnology due to its excellent mechanical, electrical and thermal properties. We demonstrated the fabrication of carbon nanotube at the surface of anodic aluminum oxide (AAO) membrane by chemical vapor deposition (CVD) method. Acetylene was used as a hydrocarbon source and Fe as catalyst. CNT was synthesized at different temperature. The iron catalyst was confined in the holes of the AAO membrane. A variety of carbon structures such as nanotubes, helices, spiral, and hook-like curved shapes in the range of micrometer were synthesized. High graphitic multiwall carbon nanotube (MWCNT) was found at 700-750°C temperature.

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