Synthesis and properties of nanoparticulate titanium dioxide compounds

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dc.contributor.advisorKey, David
dc.contributor.authorButhelezi, Motlalepula Isaac
dc.contributor.otherDept. of Chemistry
dc.contributor.otherFaculty of Science
dc.date.accessioned2013-09-10T12:12:09Z
dc.date.accessioned2024-05-09T10:50:07Z
dc.date.available2011/02/25 13:17
dc.date.available2011/02/25
dc.date.available2013-09-10T12:12:09Z
dc.date.available2024-05-09T10:50:07Z
dc.date.issued2009
dc.descriptionMagister Scientiae - MScen_US
dc.description.abstractAn electrolytic cell was designed and constructed for the preparation of TiO2 nanotubes. Conditions of anodic oxidation were established to reproducibly prepare TiO2 nanotubes of average length 35-50 μm vertically orientated relative to the plain of a pure titanium metal sheet. A non-aqueous solution of ethylene glycol containing small percentage of ammonium fluoride was used as the electrolyte with an applied voltage of 60 V. The morphology and dimensions of the nanotube arrays were studied by scanning (SEM) and transmission (TEM) electron microscopy. The effect of calcination under different conditions of temperature and atmosphere (nitrogen, argon and air) were assessed by both X-ray diffraction (XRD) and cyclic voltammetry (CV). Cyclic voltammetry studies were made possible by construction of a specially designed titanium electrode upon which the nanotubes were prepared. CV studies established a positive correlation between crystallinity and conductivity of the nanotubes. Doping of the nanotubes with nitrogen and carbon was established by elemental analysis, X-ray photoelectron spectroscopy (XPS) and Rutherford back scattering (RBS). The effect of nonmetal doping on the band gap of the TiO2 nanotubes was investigated by diffuse reflectance spectroscopy (DRS).en_US
dc.description.countrySouth Africa
dc.identifier.urihttps://hdl.handle.net/10566/14478
dc.language.isoenen_US
dc.publisherUniversity of the Western Capeen_US
dc.rights.holderUniversity of the Western Capeen_US
dc.subjectTitanium dioxideen_US
dc.subjectNanotubeen_US
dc.subjectAnodic oxidationen_US
dc.subjectElectrochemical reductionen_US
dc.subjectPhotoelectrochemical reductionen_US
dc.subjectAmorphousen_US
dc.subjectAnnealingen_US
dc.subjectBand gapen_US
dc.subjectVoltammogramen_US
dc.subjectConductivityen_US
dc.titleSynthesis and properties of nanoparticulate titanium dioxide compoundsen_US
dc.typeThesisen_US

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