The Synthesis of Bridging Carbon Particles with Carbon Nanotubes from Areca catechu Husk Waste as Supercapacitor Electrodes

This paper presents an influence of reinforcement and additions types on tribological properties for composite materials produced for potential application in high loaded friction point. The influence of carbon nanotubes or amorphous form of carbon on tribological properties was subject of authors' interest. A technology of materials manufacturing based on preparation of composite powders using high energy ball milling, with subsequent hot pressing in the semi-liquid phase. All materials based on an aluminum alloys, with silicon carbide (SiC) or silicon nitride particles (Si3N4) applied as a reinforcement. As a additions 1 wt.% of multiwalled carbon nanotubes (CNT) or 5 wt.% of glassy carbon particles (GCp) were used. A proper parameters selection (speed, powder to ball ratio, time ect.) of high energy milling led to fragmentation of ceramic particles up to nano- or submicro scale with desirable homogenization in whole volume of solid material. Due to partially crushed of glassy carbon particles, their size was between 2 – 200 μm. However GCp revealed also proper distribution in volume of composite. Moreover, the good quality of bonding between matrix and reinforcement particles were achieved due to high energy during milling. For manufactured materials a rating of tribological properties (coefficient of friction, wear rate, ect.) at ambient and high temperature were made. The research confirmed that, due to desirable coefficient of friction (COF) value and low mass loss, manufactured materials can be applied in automotive industry, eg. for brake pads. A high stability of COF on desirable value (0.5 – 0.8) was observed up to temperature higher than 500 °C. The application of carbon additions resulted in increasing of friction properties. The material with silicon nitride as a reinforcement and glassy carbon particles addition revealed the best friction properties between analysed materials.

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Influence of Carbon Source for Carbon Nanotubes Synthesis from Controllable Flame

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1048.410 ◽

2014 ◽

Vol 1048 ◽

pp. 410-413

Author(s):

Yuan Chao Liu ◽

Jun Tie Che ◽

Jing Hao Ren

Keyword(s):

Carbon Nanotubes ◽

Carbon Monoxide ◽

Carbon Source ◽

Iron Catalyst ◽

Structural Defects ◽

Catalyst Precursor ◽

Hydrocarbon Gases ◽

Carbon Particles ◽

Hydrocarbon Gas ◽

Flame Method

The flame method is a kind of new method for preparation of carbon nanotubes. The hydrocarbon gas (acetylene, ethylene, methane) or carbon monoxide is often selected as carbon source gas in this method. Carbon monoxide is a kind of effective carbon source gas in preparation of carbon nanotubes from the high temperature flame compared with hydrocarbon gases. The pentacarbonyl iron is served as catalyst precursor in the experiment. Austenitic stainless steel type316 is selected as sampling substrate in the flame experiment. The carbon nanotubes from the controllable flame have graphite well-crystallized and less structural defects relatively. The nanotube diameter consistency is also relatively good. Carbon monoxide began to decompose at higher temperature than that of hydrocarbon gas and its decomposition rate is suitable for the synthesis of carbon nanotubes in the flame. In addition, the carbon monoxide has the ability to split large iron catalyst particles and prefers to react with iron catalyst. But only a few carbon nanotubes mixed with lots of iron catalyst particles, soot and amorphous carbon particles come into being when low mass flow of carbon monoxide is provided.

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Spherical carbon particles and carbon nanotubes prepared by autogenic reactions: Evaluation as anodes in lithium electrochemical cells

Energy & Environmental Science ◽

10.1039/c0ee00256a ◽

2011 ◽

Vol 4 (5) ◽

pp. 1904-1912 ◽

Cited By ~ 122

Author(s):

Vilas G. Pol ◽

Michael M. Thackeray

Keyword(s):

Carbon Nanotubes ◽

Electrochemical Cells ◽

Carbon Particles ◽

Spherical Carbon

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Diffusion of Multiwall Carbon Nanotubes into Industrial Polymers

Diffusion Foundations ◽

10.4028/www.scientific.net/df.23.213 ◽

2019 ◽

Vol 23 ◽

pp. 213-221

Author(s):

Ponnusamy Senthil Kumar ◽

A. Saravanan

Keyword(s):

Carbon Nanotubes ◽

Multiwall Carbon Nanotubes ◽

Polymer Chains ◽

Carbon Particles ◽

Mechanical Quality ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes ◽

Multiwall Carbon ◽

Weight Proportion ◽

Carbon Molecule

Carbon nanotubes (CNTs) are made out of carbon atoms connected in hexagonal shapes, with every carbon molecule covalently attached to three other carbon particles. The properties of nanotubes have made scientists and organizations think about utilizing them in many fields. For instance, since carbon nanotubes have the most noteworthy quality to-weight proportion of any known material. Nanocomposites of adjusted multi walled carbon nanotubes (MWCNTs) installed in a polymer matrix yield a one of a kind mix of warm and electrical properties and mechanical quality. The composites combine the vast pseudo capacitance of the directing polymers with the quick charging/releasing two-fold film impedance and incredible machine-driven possessions of the carbon nanotubes. The electrochemically co-stored composites are the most homogeneous and demonstrate an unordinary communication between the polymer and nanotubes, offering ascend to a reinforced electron delocalisation and conjugation along the polymer chains

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Synthesis and Cytotoxicity Analysis of Carbon Nanohorn-Quantum Dot Complexes

ASME 2011 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2011-53968 ◽

2011 ◽

Author(s):

Kristen A. Zimmermann ◽

Jianfei Zhang ◽

Harry Dorn ◽

Christopher Rylander ◽

Marissa Nichole Rylander

Keyword(s):

Carbon Nanotubes ◽

Drug Delivery ◽

Carbon Nanoparticles ◽

Common Type ◽

Van Der Waals Interactions ◽

Medical Applications ◽

Graphene Sheets ◽

Medical Field ◽

Carbon Particles ◽

Surface Modified

Carbon nanoparticles have the potential to significantly impact the medical field over the next decade. Currently, carbon nanoparticles are being studied for a myriad of applications, including drug delivery, selective laser therapy, imaging, and biosensing. The most common type of carbon particles being investigated are carbon nanotubes (CNTs). CNTs are attractive materials for medical applications because of their physical properties and the ease with which they can be surface modified; however, there is a great deal of controversy over their possible toxicity. A more novel type of CNT that was discovered in 1999 by Iijima et al. is the carbon nanohorn [1]. Individual single-walled nanohorns (SWNHs) are single graphene sheets that roll into a conical open ended structure. The open ends of these cones are then attracted to one another through van der Waals interactions and form a flower-like final structure [2]. SWNHs are more favorable for medical applications because they are produced without the use of metal catalysts abating the concern of toxicity associated with CNTs.

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Bridging mesoporous carbon particles with carbon nanotubes

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2006.09.030 ◽

2007 ◽

Vol 98 (1-3) ◽

pp. 323-329 ◽

Cited By ~ 35

Author(s):

Fabing Su ◽

X.S. Zhao ◽

Yong Wang ◽

Jim Yang Lee

Keyword(s):

Carbon Nanotubes ◽

Mesoporous Carbon ◽

Carbon Particles

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Synthesis and Characterization of Carbon Nanotubes Grown on Carbon Particles by Using High Vacuum Laser Ablation.

Shinku ◽

10.3131/jvsj.45.609 ◽

2002 ◽

Vol 45 (7) ◽

pp. 609-612 ◽

Cited By ~ 5

Author(s):

Syunji TAKAHASHI ◽

Takashi IKUNO ◽

Takuji OYAMA ◽

Shin-ichi HONDA ◽

Mitsuhiro KATAYAMA ◽

...

Keyword(s):

Carbon Nanotubes ◽

Laser Ablation ◽

High Vacuum ◽

Synthesis And Characterization ◽

Carbon Particles

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Novel Method of Evaluating the Purity of Multiwall Carbon Nanotubes Using Raman Spectroscopy

Journal of Nanomaterials ◽

10.1155/2013/615915 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 5

Author(s):

Young Chul Choi ◽

Kyoung-In Min ◽

Mun Seok Jeong

Keyword(s):

Carbon Nanotubes ◽

Raman Spectroscopy ◽

Reference Material ◽

Multiwall Carbon Nanotubes ◽

Chemical Vapor ◽

Excitation Wavelength ◽

Established Method ◽

Carbon Particles ◽

Novel Method ◽

Multiwall Carbon

We propose the quantitative method of evaluating the purity of multiwall carbon nanotubes (MWCNTs) using Raman spectroscopy. High purity MWCNTs were prepared by chemical vapor deposition (CVD) to be used as a reference material with 100% purity. Since the intensity and wavenumber ofD′′-band located at around 1500 cm−1were found to be independent of the excitation wavelength of a laser, the purity of MWCNTs was measured by comparing the intensity ratio ofD′′-band toG-band (ID′′/IG) of the sample with that of a reference material. The established method was verified by testing the mixture of amorphous carbon particles and reference MWCNTs.

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Carbon Nanotubes Decorated by Carbon Nanospheres through Hydrocarbon Ion Deposition

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.693.541 ◽

2016 ◽

Vol 693 ◽

pp. 541-547 ◽

Cited By ~ 1

Author(s):

Qin Tao Li ◽

Hong Jun Wang

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Carbon Nanospheres ◽

Deposition Zone ◽

Carbon Particles ◽

Transmission Electron ◽

Cnts Surface ◽

Three Stages ◽

Deposition Techniques ◽

Ion Deposition

The carbon nanotubes (CNTs) modified by the carbon particles with diameter of 120-180 nm are prepared by using hydrocarbon ion deposition techniques. Based on the investigation of scanning electron microscopy and transmission electron microscopy, the CNTs are decorated by some nanospheres with size of 120-180 nm randomly, and the full CNTs surface besides the area of nanosphere is coated by the graphene stacks with size of 10-15 nm. The nanospheres are composed of several nanoparticles of graphene stacks and are seamless connected with graphene stacks. The sparse distribution CNTs on Si substrate is crucial for the formation of carbon nanospheres. The formation of carbon nanospheres proceeds through the following three stages: the formation of graphene nanoparticle on CNTs surface and silicon substrate – the migration of active hydrocarbon groups towards the surface of the CNTs deposition zone at high temperature – the formation of carbon nanospheres by the aggregating hydrocarbon active groups.

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