Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime

This thesis presents the development of a two-step reduced graphene oxide that is to be implemented as the radiating element for a patch antenna. The two-step reduced graphene oxide is prepared with graphite powder and is oxidized using the Tour’s method. The graphene oxide produced from this proced...

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Format:	Thesis
Language:	English
Subjects:	Graphene Antenna radiation patterns Antennas (Electronics) Graphene Oxide
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/4/Mubaraq%20Hans.pdf
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record_format	uketd_dc
spelling	my-unimap-779792023-03-06T02:03:48Z Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime Mohd Noor, Ahmad, Prof. Dr. This thesis presents the development of a two-step reduced graphene oxide that is to be implemented as the radiating element for a patch antenna. The two-step reduced graphene oxide is prepared with graphite powder and is oxidized using the Tour’s method. The graphene oxide produced from this procedure is cleaned and neutralized before microwave irradiation procedure is carried out to begin the reduction process, by which oxygen containing functional groups are removed from the material. The second step of the reduction process consists of using the strongest hydrohalic acid, hydroiodic acid, to reduce graphene oxide in a reflux setup. The two-step reduced graphene oxide and its precursors are characterized using Field Emission Scanning Electron Microscopy (FESEM), Thermogravimetric analyzer (TGA), Ultraviolet-Visible Spectroscopy (UVVis), Fourier Transform Infrared Spectroscopy (FTIR), 4-Point Probe Conductivity Test, X-Ray Diffraction analyzer (XRD), and Energy Dispersive X-Ray analyzer (EDX). The results of the two-step reduction process yielded a reduced graphene oxide with a net conductivity measured at 4.8 x 102 Sm-1. The measured resistivity and electrical conductivity results were higher in the two-stepped method than any measurement yielded from its precursor materials. This thesis explains the effects that microwave irradiation and chemical reduction has on the degree of reduction and the overall structure of reduced graphene oxide. The two-step reduced graphene oxide was used as the radiating element in a microstrip patch antenna to determine the antenna performance in the microwave region. Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77979 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/1/Page%201-24.pdf fdc0da7bc1edd24f19ce6964a8c0835f http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/2/Full%20text.pdf 7d0f9aabd9b0ed090fbfc041978fc17e http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/4/Mubaraq%20Hans.pdf 85d4b1f04a47c49f3fd1624fcac9f4c0 Universiti Malaysia Perlis (UniMAP) Graphene Antennas, Horn Antenna radiation patterns Antennas (Electronics) Graphene Oxide School of Materials Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Mohd Noor, Ahmad, Prof. Dr.
topic	Graphene Graphene Antenna radiation patterns Antennas (Electronics) Graphene Oxide
spellingShingle	Graphene Graphene Antenna radiation patterns Antennas (Electronics) Graphene Oxide Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime
description	This thesis presents the development of a two-step reduced graphene oxide that is to be implemented as the radiating element for a patch antenna. The two-step reduced graphene oxide is prepared with graphite powder and is oxidized using the Tour’s method. The graphene oxide produced from this procedure is cleaned and neutralized before microwave irradiation procedure is carried out to begin the reduction process, by which oxygen containing functional groups are removed from the material. The second step of the reduction process consists of using the strongest hydrohalic acid, hydroiodic acid, to reduce graphene oxide in a reflux setup. The two-step reduced graphene oxide and its precursors are characterized using Field Emission Scanning Electron Microscopy (FESEM), Thermogravimetric analyzer (TGA), Ultraviolet-Visible Spectroscopy (UVVis), Fourier Transform Infrared Spectroscopy (FTIR), 4-Point Probe Conductivity Test, X-Ray Diffraction analyzer (XRD), and Energy Dispersive X-Ray analyzer (EDX). The results of the two-step reduction process yielded a reduced graphene oxide with a net conductivity measured at 4.8 x 102 Sm-1. The measured resistivity and electrical conductivity results were higher in the two-stepped method than any measurement yielded from its precursor materials. This thesis explains the effects that microwave irradiation and chemical reduction has on the degree of reduction and the overall structure of reduced graphene oxide. The two-step reduced graphene oxide was used as the radiating element in a microstrip patch antenna to determine the antenna performance in the microwave region.
format	Thesis
title	Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime
title_short	Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime
title_full	Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime
title_fullStr	Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime
title_full_unstemmed	Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime
title_sort	synthesis and characterization of a two-step reduced graphene oxide for antena applications in the microwave resime
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Materials Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77979/4/Mubaraq%20Hans.pdf
_version_	1776104239023521792

Synthesis and characterization of a two-step reduced Graphene Oxide for antena applications in the microwave resime

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