Physical properties optimization of carbon nanotubes from palm oil precursor (IR)

Carbon nanotubes (CNT) were synthesized from palm oil as carbon source using thermal chemical vapor deposition method (TCVD). The parametric studies were carried out to determine the optimum parameters to produce CNT with the optimum physical properties. The parameters comprise of synthesis temperat...

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Main Author:	Nur Azmina Mohamed Safian
Format:	thesis
Language:	eng
Published:	2014
Subjects:	QD Chemistry
Online Access:	https://ir.upsi.edu.my/detailsg.php?det=2414
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spelling	oai:ir.upsi.edu.my:24142020-02-27 Physical properties optimization of carbon nanotubes from palm oil precursor (IR) 2014 Nur Azmina Mohamed Safian QD Chemistry Carbon nanotubes (CNT) were synthesized from palm oil as carbon source using thermal chemical vapor deposition method (TCVD). The parametric studies were carried out to determine the optimum parameters to produce CNT with the optimum physical properties. The parameters comprise of synthesis temperature, catalyst concentration, substrate positions, precursor amount, synthesis time, carrier gas and variety of bio-hydrocarbon precursors. The physical properties of CNT were analyzed using electron microscope, energy-dispersive X-ray analysis, micro-Raman and Fourier transform infrared (FTIR) spectroscopy, thermogravimetric (TGA) and CHNS-O analyser as well as four point probe for IV measurement. The carbon precursor was also analyzed using TGA, FTIR spectroscopy and gas chromatography mass spectrometry (GC-MS) in order to optimize the physical properties of CNT. The findings revealed that the synthesis parameters have significant influence on the synthesized CNT. Based on the analysis, well-aligned CNT with uniform diameters (23.4-28.4 nm), high purity (85.93 %) and crystallinity (ID/IG = 0.54) were successfully produced from 6 ml of palm oil precursor at 750 oC synthesis temperature, 5.33 wt% catalyst concentration at P3 substrate positions within 60 minutes synthesis time in argon ambient. The formulation of CNT growth mechanism produced from palm oil on the important parameters such as the effect of synthesis temperature, catalyst concentrations as well as the effect of carrier gas were proposed. In term of electrical properties, the CNT from palm oil has the highest conductivity of 3612.59 S.cm-1 as compared to other samples produced from variety of biohydrocarbon precursors. From the IV characteristics, it shows that the metal contact helps to increase the electrical conductivity of the samples. The field electron emission (FEE) equipment was used to determine the FEE properties of CNT. From the FEE analysis, the CNT from palm oil was able to emit electrons at the lowest fields of 2.64 V.m-1 and reach highest maximum current of 15.07 mA.m-2. It can be concluded that the optimum physical properties of palm oil based CNT were successfully produced by TCVD method with potential application as field emitting devices. 2014 thesis https://ir.upsi.edu.my/detailsg.php?det=2414 https://ir.upsi.edu.my/detailsg.php?det=2414 text eng closedAccess Masters Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik N/A
institution	Universiti Pendidikan Sultan Idris
collection	UPSI Digital Repository
language	eng
topic	QD Chemistry
spellingShingle	QD Chemistry Nur Azmina Mohamed Safian Physical properties optimization of carbon nanotubes from palm oil precursor (IR)
description	Carbon nanotubes (CNT) were synthesized from palm oil as carbon source using thermal chemical vapor deposition method (TCVD). The parametric studies were carried out to determine the optimum parameters to produce CNT with the optimum physical properties. The parameters comprise of synthesis temperature, catalyst concentration, substrate positions, precursor amount, synthesis time, carrier gas and variety of bio-hydrocarbon precursors. The physical properties of CNT were analyzed using electron microscope, energy-dispersive X-ray analysis, micro-Raman and Fourier transform infrared (FTIR) spectroscopy, thermogravimetric (TGA) and CHNS-O analyser as well as four point probe for IV measurement. The carbon precursor was also analyzed using TGA, FTIR spectroscopy and gas chromatography mass spectrometry (GC-MS) in order to optimize the physical properties of CNT. The findings revealed that the synthesis parameters have significant influence on the synthesized CNT. Based on the analysis, well-aligned CNT with uniform diameters (23.4-28.4 nm), high purity (85.93 %) and crystallinity (ID/IG = 0.54) were successfully produced from 6 ml of palm oil precursor at 750 oC synthesis temperature, 5.33 wt% catalyst concentration at P3 substrate positions within 60 minutes synthesis time in argon ambient. The formulation of CNT growth mechanism produced from palm oil on the important parameters such as the effect of synthesis temperature, catalyst concentrations as well as the effect of carrier gas were proposed. In term of electrical properties, the CNT from palm oil has the highest conductivity of 3612.59 S.cm-1 as compared to other samples produced from variety of biohydrocarbon precursors. From the IV characteristics, it shows that the metal contact helps to increase the electrical conductivity of the samples. The field electron emission (FEE) equipment was used to determine the FEE properties of CNT. From the FEE analysis, the CNT from palm oil was able to emit electrons at the lowest fields of 2.64 V.m-1 and reach highest maximum current of 15.07 mA.m-2. It can be concluded that the optimum physical properties of palm oil based CNT were successfully produced by TCVD method with potential application as field emitting devices.
format	thesis
qualification_name
qualification_level	Master's degree
author	Nur Azmina Mohamed Safian
author_facet	Nur Azmina Mohamed Safian
author_sort	Nur Azmina Mohamed Safian
title	Physical properties optimization of carbon nanotubes from palm oil precursor (IR)
title_short	Physical properties optimization of carbon nanotubes from palm oil precursor (IR)
title_full	Physical properties optimization of carbon nanotubes from palm oil precursor (IR)
title_fullStr	Physical properties optimization of carbon nanotubes from palm oil precursor (IR)
title_full_unstemmed	Physical properties optimization of carbon nanotubes from palm oil precursor (IR)
title_sort	physical properties optimization of carbon nanotubes from palm oil precursor (ir)
granting_institution	Universiti Pendidikan Sultan Idris
granting_department	Fakulti Sains dan Matematik
publishDate	2014
url	https://ir.upsi.edu.my/detailsg.php?det=2414
_version_	1747833008695541760

Physical properties optimization of carbon nanotubes from palm oil precursor (IR)

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