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Synthesis of Carbon nano structures by plasma discharge; Sintesis de nanoestructuras de carbono por descarga de plasmaa

Abstract

Due to the great quantity of applications of the carbon nano structures (NEC) in diverse areas like: synthesis of super-resistant materials, hydrogen storage, nano sensors generation and nano catalysts, it has seen the necessity to generate new processes of synthesis of this materials as well as to already improve those existent. The present work has as objective to optimize the NEC synthesis process by means of the electric arc method which uses alternating current to high frequencies (HF), obtaining relatively clean products; that is to say, it hardly presents amorphous material neither sludges. They stand out the obtaining of carbon nano fibers (NFC) by means of a luminescent-arch discharge, in a gas mixture of He-CH{sub 4} with 34% at. Ni/10.32% at.Y like catalyst; at a frequency of 42 kHz and low power (300 W). This method benefits the amass of the particles in both electrodes due to the high frequencies. The time of duration of the process oscillates between 5 and 20 minutes. The obtained product was characterized by scanning electron microscopy (MEB), transmission electron microscopy (MET) to determine the NEC type obtained and by X-ray diffraction analysis and Raman spectroscopy for determining the purity of the samples. The NFC  More>>
Authors:
Publication Date:
Jul 01, 2007
Product Type:
Thesis/Dissertation
Report Number:
INIS-MX-2525
Resource Relation:
Other Information: TH: Thesis (Chemical Engineer)
Subject:
36 MATERIALS SCIENCE; ALTERNATING CURRENT; CARBON; CATALYSTS; DIAGRAMS; ELECTRIC ARCS; ELECTRODES; EMISSION SPECTROSCOPY; EXPERIMENTAL DATA; IMAGES; NANOSTRUCTURES; PLASMA; RAMAN SPECTROSCOPY; SAMPLING; SCANNING ELECTRON MICROSCOPY; SYNTHESIS; TIME DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
OSTI ID:
21013988
Research Organizations:
Instituto Tecnologico de Toluca, Metepec, Estado de Mexico (Mexico)
Country of Origin:
Mexico
Language:
Spanish
Other Identifying Numbers:
TRN: MX0800132036380
Availability:
Available from INIS in electronic form; Also available from the Instituto Nacional de Investigaciones Nucleares, Centro de Informacion y Documentacion Nuclear, 52750 La Marquesa, Estado de Mexico (MX). e-mail: svp@nuclear.inin.mx; rbc@nuclear.inin.mx
Submitting Site:
MXN
Size:
74 pages
Announcement Date:
Apr 26, 2008

Citation Formats

Jimenez L, M L. Synthesis of Carbon nano structures by plasma discharge; Sintesis de nanoestructuras de carbono por descarga de plasmaa. Mexico: N. p., 2007. Web.
Jimenez L, M L. Synthesis of Carbon nano structures by plasma discharge; Sintesis de nanoestructuras de carbono por descarga de plasmaa. Mexico.
Jimenez L, M L. 2007. "Synthesis of Carbon nano structures by plasma discharge; Sintesis de nanoestructuras de carbono por descarga de plasmaa." Mexico.
@misc{etde_21013988,
title = {Synthesis of Carbon nano structures by plasma discharge; Sintesis de nanoestructuras de carbono por descarga de plasmaa}
author = {Jimenez L, M L}
abstractNote = {Due to the great quantity of applications of the carbon nano structures (NEC) in diverse areas like: synthesis of super-resistant materials, hydrogen storage, nano sensors generation and nano catalysts, it has seen the necessity to generate new processes of synthesis of this materials as well as to already improve those existent. The present work has as objective to optimize the NEC synthesis process by means of the electric arc method which uses alternating current to high frequencies (HF), obtaining relatively clean products; that is to say, it hardly presents amorphous material neither sludges. They stand out the obtaining of carbon nano fibers (NFC) by means of a luminescent-arch discharge, in a gas mixture of He-CH{sub 4} with 34% at. Ni/10.32% at.Y like catalyst; at a frequency of 42 kHz and low power (300 W). This method benefits the amass of the particles in both electrodes due to the high frequencies. The time of duration of the process oscillates between 5 and 20 minutes. The obtained product was characterized by scanning electron microscopy (MEB), transmission electron microscopy (MET) to determine the NEC type obtained and by X-ray diffraction analysis and Raman spectroscopy for determining the purity of the samples. The NFC is relatively free of amorphous coal. The surface and structural analysis indicates that the fibers have a half diameter of 80 nm. It is also made, a study by optical emission spectroscopy of plasma using the Swan band for determining the temperature. (Author)}
place = {Mexico}
year = {2007}
month = {Jul}
}