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Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam

In this study, single crystalline nanowires of manganese (IV) oxide have been successfully synthesized via soft chemical process through a facile hydrothermal method. Characterization analysis has been carried out for manganese (IV) oxide as-received, as-synthesized, as well as calcinated at 400, 50...

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Main Author: Subashini, Supramaniam
Format: Thesis
Published: 2013
Subjects:
T Technology (General)
TJ Mechanical engineering and machinery
Online Access:http://studentsrepo.um.edu.my/8230/4/SUBASHINI_A%2DP_SUPRAMANIAM.pdf
http://studentsrepo.um.edu.my/8230/
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spelling my.um.stud.82302018-04-27T08:56:27Z Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam Subashini, Supramaniam T Technology (General) TJ Mechanical engineering and machinery In this study, single crystalline nanowires of manganese (IV) oxide have been successfully synthesized via soft chemical process through a facile hydrothermal method. Characterization analysis has been carried out for manganese (IV) oxide as-received, as-synthesized, as well as calcinated at 400, 500 and 600ºC. Various characterization techniques have been used such as structural analysis using X-Ray Diffractometer (XRD), surface analysis using Field Emission Scanning Electron Microscope (FE-SEM), chemical composition analysis using Energy Dispersive X-Ray Spectroscopy (EDX), morphology and physical size analysis using Transmission Electron Microscope (TEM), and thermal analysis using Thermogravimetry (TGA). Through these studies, X-ray diffraction revealed that phase transitions occurred for manganese oxide nanowires at calcination temperature 500ºC. The crystallite sizes of manganese oxide nanowires reduces as the calcination temperature increases. FE-SEM analysis shows larger production of manganese oxide nanowires obtained through hydrothermal method and forming into clusters as the calcination temperature increases. EDX test confirmed the presence of manganese and oxygen as dominant elements in the compound. The chemical compositions remain unchanged even after applying higher temperature. An increase in temperature affected the particle size is shown in TEM images. The particle size is reduced as the calcination temperature is increased. This indicates the diameter of the nanowires gets smaller as the heating temperature gets higher forming thinner and longer nanowires. TGA results identified the changes in weight as well as determine the thermal stability as the calcination temperature increases. The decomposition temperature for MnO2 nanowires to reach thermal stability is starting at 600ºC. 2013-03-28 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/8230/4/SUBASHINI_A%2DP_SUPRAMANIAM.pdf Subashini, Supramaniam (2013) Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/8230/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic T Technology (General)
TJ Mechanical engineering and machinery
spellingShingle T Technology (General)
TJ Mechanical engineering and machinery
Subashini, Supramaniam
Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam
description In this study, single crystalline nanowires of manganese (IV) oxide have been successfully synthesized via soft chemical process through a facile hydrothermal method. Characterization analysis has been carried out for manganese (IV) oxide as-received, as-synthesized, as well as calcinated at 400, 500 and 600ºC. Various characterization techniques have been used such as structural analysis using X-Ray Diffractometer (XRD), surface analysis using Field Emission Scanning Electron Microscope (FE-SEM), chemical composition analysis using Energy Dispersive X-Ray Spectroscopy (EDX), morphology and physical size analysis using Transmission Electron Microscope (TEM), and thermal analysis using Thermogravimetry (TGA). Through these studies, X-ray diffraction revealed that phase transitions occurred for manganese oxide nanowires at calcination temperature 500ºC. The crystallite sizes of manganese oxide nanowires reduces as the calcination temperature increases. FE-SEM analysis shows larger production of manganese oxide nanowires obtained through hydrothermal method and forming into clusters as the calcination temperature increases. EDX test confirmed the presence of manganese and oxygen as dominant elements in the compound. The chemical compositions remain unchanged even after applying higher temperature. An increase in temperature affected the particle size is shown in TEM images. The particle size is reduced as the calcination temperature is increased. This indicates the diameter of the nanowires gets smaller as the heating temperature gets higher forming thinner and longer nanowires. TGA results identified the changes in weight as well as determine the thermal stability as the calcination temperature increases. The decomposition temperature for MnO2 nanowires to reach thermal stability is starting at 600ºC.
format Thesis
author Subashini, Supramaniam
author_facet Subashini, Supramaniam
author_sort Subashini, Supramaniam
title Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam
title_short Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam
title_full Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam
title_fullStr Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam
title_full_unstemmed Synthesis and characterization of manganese (IV) oxide nanowire via hydrothermal method / Subashini Supramaniam
title_sort synthesis and characterization of manganese (iv) oxide nanowire via hydrothermal method / subashini supramaniam
publishDate 2013
url http://studentsrepo.um.edu.my/8230/4/SUBASHINI_A%2DP_SUPRAMANIAM.pdf
http://studentsrepo.um.edu.my/8230/
_version_ 1738506116177854464
score 13.211869

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