Synthesis and characterization of silicon carbide nanotube via microwave assisted method

Silicon carbide (SiC) is well known as one of the most useful materials due to its high hardness next to diamond. Silicon carbide nanotubes (SiCNTs) and nanowires (SiCNWs) especially have high potential in high temperature and harsh environment electronic applications. The objectives of this stud...

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Format:	Thesis
Language:	English
Subjects:	Nanostructured materials Silicon compounds Silicon polymers Microwave amplifiers Chemical tests and reagents
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/3/Declaration%20Form.pdf
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spelling	my-unimap-767322022-11-08T02:54:43Z Synthesis and characterization of silicon carbide nanotube via microwave assisted method Voon, Chun Hong, Dr. Silicon carbide (SiC) is well known as one of the most useful materials due to its high hardness next to diamond. Silicon carbide nanotubes (SiCNTs) and nanowires (SiCNWs) especially have high potential in high temperature and harsh environment electronic applications. The objectives of this study were to investigate the effect of ratio of SiO2 particles and MWCNTs, heating temperature, heating duration and types of CNTs (MWCNTs and SWCNTs) on the synthesis of SiCNTs by microwave heating in terms of morphology, compositions, optical properties and thermal stability. Effect of different ratio was studied by varying the molar ratio of SiO2 particles and MWCNTs in the blend to 1:1, 1:3, 1:5 and 1:7 while for the study of effect of heating temperature, temperature was varied from 1350 °C, 1400 °C and 1450 °C. Heating duration of 20, 40 and 60 minutes were used in this study to investigate the effect of heating duration on the synthesis of SiCNTs. Two types of CNTs (MWCNTs and SWCNTs) were used to investigate the effect of type of CNTs on synthesized SiCNMs. Ultrasonic mixing was used to mix SiO2 particles and MWCNTs in ethanol which was then dried before being cold pressed into 3 mm pellet. After that, the pellet was put into alumina crucible and microwave heating was conducted in a 2.45 GHz multi-mode cavity microwave with heating rate of 30 °C/minute. FESEM and TEM were used to investigate the morphology of the SiCNMs. Meanwhile, composition analysis was done by using XRD and EDX. PL was used to study the optical properties, while thermal properties were investigated by using TGA analysis. Ratio 1:3 of SiO2 particles and MWCNTs has showed synthesis of single-phase SiCNTs as supported by XRD patterns where no residual of SiO2 particles and MWCNTs was observed. Meanwhile, heating temperature at 1400 °C and 40 minutes heating duration was determined as the most ideal temperature to synthesize single-phase SiCNTs in which SiO2 particles and MWCNTs reacted completely become single-phase SiCNTs. Furthermore, single phase SiCNTs was successfully synthesized from blend of SiO2 particles and MWCNTs in the ratio of 1:3 while blend of SiO2 particles and SWCNTs in similar ratio formed SiCNWs. Images of TEM have confirmed that the synthesized SiCNTs has hollow tubular structure while SiCNWs has a solid nanowires structure. It can be postulated that ratio of SiO2 particles and MWCNTs, heating temperature and heating duration has significant effect to the synthesis of SiCNTs. Besides that, type of CNTs (MWCNTs and SWCNTs has significant effect on the formation of SiCNMs where SiCNTs was obtained from the blend of SiO2 particles and MWCNTs while SiCNWs synthesized when blend of SiO2 particles and SWCNTs was used. It can be concluded that microwave heating for the synthesis of single-phase SiCNTs was achieved when blend of SiO2 particles and MWCNTs in the ratio of 1:3, heating temperature at 1400 °C, heating duration of 40 minutes was used in this study. Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/76732 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/4/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/1/Page%201-24.pdf 8d4c3b7f7e165783e5fba65ff052ac42 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/2/Full%20text.pdf a7bfd295567242963fa8e39bf64c82f4 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/3/Declaration%20Form.pdf c810a461dab8a53d1158ea96758f5a33 Universiti Malaysia Perlis (UniMAP) Nanostructured materials Silicon compounds Silicon polymers Microwave amplifiers Chemical tests and reagents Institute of Nano Electronic Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Voon, Chun Hong, Dr.
topic	Nanostructured materials Silicon compounds Silicon polymers Microwave amplifiers Chemical tests and reagents
spellingShingle	Nanostructured materials Silicon compounds Silicon polymers Microwave amplifiers Chemical tests and reagents Synthesis and characterization of silicon carbide nanotube via microwave assisted method
description	Silicon carbide (SiC) is well known as one of the most useful materials due to its high hardness next to diamond. Silicon carbide nanotubes (SiCNTs) and nanowires (SiCNWs) especially have high potential in high temperature and harsh environment electronic applications. The objectives of this study were to investigate the effect of ratio of SiO2 particles and MWCNTs, heating temperature, heating duration and types of CNTs (MWCNTs and SWCNTs) on the synthesis of SiCNTs by microwave heating in terms of morphology, compositions, optical properties and thermal stability. Effect of different ratio was studied by varying the molar ratio of SiO2 particles and MWCNTs in the blend to 1:1, 1:3, 1:5 and 1:7 while for the study of effect of heating temperature, temperature was varied from 1350 °C, 1400 °C and 1450 °C. Heating duration of 20, 40 and 60 minutes were used in this study to investigate the effect of heating duration on the synthesis of SiCNTs. Two types of CNTs (MWCNTs and SWCNTs) were used to investigate the effect of type of CNTs on synthesized SiCNMs. Ultrasonic mixing was used to mix SiO2 particles and MWCNTs in ethanol which was then dried before being cold pressed into 3 mm pellet. After that, the pellet was put into alumina crucible and microwave heating was conducted in a 2.45 GHz multi-mode cavity microwave with heating rate of 30 °C/minute. FESEM and TEM were used to investigate the morphology of the SiCNMs. Meanwhile, composition analysis was done by using XRD and EDX. PL was used to study the optical properties, while thermal properties were investigated by using TGA analysis. Ratio 1:3 of SiO2 particles and MWCNTs has showed synthesis of single-phase SiCNTs as supported by XRD patterns where no residual of SiO2 particles and MWCNTs was observed. Meanwhile, heating temperature at 1400 °C and 40 minutes heating duration was determined as the most ideal temperature to synthesize single-phase SiCNTs in which SiO2 particles and MWCNTs reacted completely become single-phase SiCNTs. Furthermore, single phase SiCNTs was successfully synthesized from blend of SiO2 particles and MWCNTs in the ratio of 1:3 while blend of SiO2 particles and SWCNTs in similar ratio formed SiCNWs. Images of TEM have confirmed that the synthesized SiCNTs has hollow tubular structure while SiCNWs has a solid nanowires structure. It can be postulated that ratio of SiO2 particles and MWCNTs, heating temperature and heating duration has significant effect to the synthesis of SiCNTs. Besides that, type of CNTs (MWCNTs and SWCNTs has significant effect on the formation of SiCNMs where SiCNTs was obtained from the blend of SiO2 particles and MWCNTs while SiCNWs synthesized when blend of SiO2 particles and SWCNTs was used. It can be concluded that microwave heating for the synthesis of single-phase SiCNTs was achieved when blend of SiO2 particles and MWCNTs in the ratio of 1:3, heating temperature at 1400 °C, heating duration of 40 minutes was used in this study.
format	Thesis
title	Synthesis and characterization of silicon carbide nanotube via microwave assisted method
title_short	Synthesis and characterization of silicon carbide nanotube via microwave assisted method
title_full	Synthesis and characterization of silicon carbide nanotube via microwave assisted method
title_fullStr	Synthesis and characterization of silicon carbide nanotube via microwave assisted method
title_full_unstemmed	Synthesis and characterization of silicon carbide nanotube via microwave assisted method
title_sort	synthesis and characterization of silicon carbide nanotube via microwave assisted method
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	Institute of Nano Electronic Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/76732/3/Declaration%20Form.pdf
_version_	1776104273210245120

Synthesis and characterization of silicon carbide nanotube via microwave assisted method

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