Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method

Well-aligned multiwall carbon nanotubes (CNTs) were successfully synthesized by floating catalyst chemical vapour deposition method at 600 0c. In this research, benzene and ferrocene were used as carbon source and catalyst respectively. Hydrogen flow rate and preheating temperature were considered a...

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Main Author:	Zadeh, Elmira Habashi
Format:	Thesis
Language:	English
Published:	2014
Subjects:	Carbon nanotubes - Research Carbon nanotubes - Properties
Online Access:	http://psasir.upm.edu.my/id/eprint/64370/1/FK%202014%20144IR.pdf
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spelling	my-upm-ir.643702018-08-01T01:56:02Z Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method 2014-09 Zadeh, Elmira Habashi Well-aligned multiwall carbon nanotubes (CNTs) were successfully synthesized by floating catalyst chemical vapour deposition method at 600 0c. In this research, benzene and ferrocene were used as carbon source and catalyst respectively. Hydrogen flow rate and preheating temperature were considered as variables in this research in order to study the impacts of these parameters on the quantity, structure and morphology of produced CNTs. The effect of hydrogen flow rate on the temperature variation inside the reactor was studied as well. The parameters such as reaction time (45 min), synthesis temperature (600 0c) and amount of ferrocece (200ml) were kept constant during the experiments. Argon was used at flow rate of 350 ml/min before and after the reaction for creating an inert atmosphere and preventing oxidation accordingly. The hydrogen flow rate was varied from 150 ml/min to 450 ml/min with increment of 50 ml/min. The preheating temperature was set at 200 and 300 0c. The morphology and structure of the produced CNTs were analysed by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM), X ray Diffraction analysis (XRD). The purity of the product were determined by using Thermal Gravimetric Analyser (TGA). The results show that the quantity of CNTs has been increased with the increase of hydrogen flow rate and preheating temperature. The quality of CNTs has been improved by increasing the hydrogen flow rate from 150 ml/min to 350 ml/min. The study reveals that lower pre-heating temperature (200 0c) has led to better quality. It was found that well-aligned CNTs were produced with different purity, depending on the hydrogen flow rated at 200 0c preheating temperature. The results indicate that the quality and quantity of CNTs are affected by both hydrogen flow rate and preheating temperature. The temperature variation inside the reactor in different hydrogen flow rate is negligible. Carbon nanotubes - Research Carbon nanotubes - Properties 2014-09 Thesis http://psasir.upm.edu.my/id/eprint/64370/ http://psasir.upm.edu.my/id/eprint/64370/1/FK%202014%20144IR.pdf text en public masters Universiti Putra Malaysia Carbon nanotubes - Research Carbon nanotubes - Properties
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Carbon nanotubes - Research Carbon nanotubes - Properties
spellingShingle	Carbon nanotubes - Research Carbon nanotubes - Properties Zadeh, Elmira Habashi Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
description	Well-aligned multiwall carbon nanotubes (CNTs) were successfully synthesized by floating catalyst chemical vapour deposition method at 600 0c. In this research, benzene and ferrocene were used as carbon source and catalyst respectively. Hydrogen flow rate and preheating temperature were considered as variables in this research in order to study the impacts of these parameters on the quantity, structure and morphology of produced CNTs. The effect of hydrogen flow rate on the temperature variation inside the reactor was studied as well. The parameters such as reaction time (45 min), synthesis temperature (600 0c) and amount of ferrocece (200ml) were kept constant during the experiments. Argon was used at flow rate of 350 ml/min before and after the reaction for creating an inert atmosphere and preventing oxidation accordingly. The hydrogen flow rate was varied from 150 ml/min to 450 ml/min with increment of 50 ml/min. The preheating temperature was set at 200 and 300 0c. The morphology and structure of the produced CNTs were analysed by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM), X ray Diffraction analysis (XRD). The purity of the product were determined by using Thermal Gravimetric Analyser (TGA). The results show that the quantity of CNTs has been increased with the increase of hydrogen flow rate and preheating temperature. The quality of CNTs has been improved by increasing the hydrogen flow rate from 150 ml/min to 350 ml/min. The study reveals that lower pre-heating temperature (200 0c) has led to better quality. It was found that well-aligned CNTs were produced with different purity, depending on the hydrogen flow rated at 200 0c preheating temperature. The results indicate that the quality and quantity of CNTs are affected by both hydrogen flow rate and preheating temperature. The temperature variation inside the reactor in different hydrogen flow rate is negligible.
format	Thesis
qualification_level	Master's degree
author	Zadeh, Elmira Habashi
author_facet	Zadeh, Elmira Habashi
author_sort	Zadeh, Elmira Habashi
title	Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
title_short	Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
title_full	Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
title_fullStr	Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
title_full_unstemmed	Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
title_sort	effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method
granting_institution	Universiti Putra Malaysia
publishDate	2014
url	http://psasir.upm.edu.my/id/eprint/64370/1/FK%202014%20144IR.pdf
_version_	1747812294719438848

Effects of hydrogen flowrate on carbon nanotube production at low temperature via floating catalyst chemical vapor deposition method

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