Browsing Philosophiae Doctor - PhD (Chemistry) by Author "Faculty of Science"
Now showing items 1-20 of 25
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The catalytic membrane reactor for the conversion of methane to methanol and formaldehyde under mild conditions
Modibedi, Remegia Mmalewane (University of the Western Cape, 2005)This thesis described the development of new catalytic system for the conversion of natural gas (methane) to liquid products such as methanol and formaldehyde. This technology can allow the exploitation of small and medium ... -
Chemical and biological investigation into some selected African indigenous medicinal plants
Babajide, Jelili Olalekan (University of the Western Cape, 2009)African medicinal plants are commonly used throughout Africa to treat a variety of ailments including wounds and ulcers, cough and chest complaints, gingivitis, fever and gonorrhoea, indication all related to infection and ... -
Chemical interactions and mobility of species infly ash-brine co-disposal systems
Fatoba, Ojo Olanrewaju (University of the Western Cape, 2010)The primary aim of these coal fired industries for co-disposing fly ash and brine was to use the fly ash as a sustainable salt sink. It is therefore important to study the interaction chemistry of the fly ash-brine systems ... -
Composite poly(dimethoxyaniline) electrochemical nanobiosensor for glufosinate and glyphosate herbicides
Songa, Everlyne Apiyo (University of the Western Cape, 2008)In this thesis, I present a simple, sensitive and low cost electrochemical nanobiosensor for quantitative determination of the herbicides glufosinate, glyphosate and its metabolite aminomethylphosphonic acid (AMPA). Firstly, ... -
The development of inorganic and organic/inorganic membranes for DMFC application
Mokrani, Touhami (University of the Western Cape, 2004)A fuel cell is an energy device that converts chemical energy to electrical energy. Low temperature fuel cells, namely the hydrogen fuel cell and the direct methanol fuel cell are preferred amongst other fuel cell types ... -
Development of new dendritic ligands for copper mediated Atom Transfer Radical Polymerization (ATRP) of methyl methacrylate
Moni, Lucky (University of the Western Cape, 2007)A variety of nitrogen based dendritic ligands have been synthesized and used in copper mediated Atom Transfer Radical Polymerization (ATRP) of MMA. These ligands were derived from the commercially available Generation 1 ... -
Development of polyaniline nanotube electrocatalysts and sesor devices for phenolic-pollutants
Klink, Michael John (University of the Western Cape, 2007)As a source of life, water is one of the most precious commodities for all living organisms. Water resources are reported to be declining in numbers or the amount of water present and the existing onses are being polluted ... -
Electrochemical energy conversion using metal hydrides hydrogen storage materials
Jonas, Ncumisa Prudence (University of the Western Cape, 2010)Metal hydrides hydrogen storage materials have the ability to reversibly absorb and release large amounts of hydrogen at low temperature and pressure. In this study, metal hydride materials employed as negative electrodes ... -
Electrochemical impedance modelling of the reactivities of dendrimeric poly(propylene imine) DNA nanobiosensors
Arotiba, Omotayo Ademola (University of the Western Cape, 2008)In this thesis, I present the electrochemical studies of three dendrimeric polypropylene imine (PPI) nanomaterials and their applications as a platform in the development of a novel label free DNA nanobiosensor based on ... -
Electrochemical ochratoxin a immunosensors based on polyaniline nanocomposites templated with amine- and sulphate-functionalised polystyrene latex beads
Muchindu, Munkombwe (University of the Western Cape, 2010)Polyaniline nanocomposites doped with poly(vinylsulphonate) (PV-SO3) and nanostructured polystyrene (PSNP) latex beads functionalized with amine (PSNP-NH2) and sulphate ((PSNP-OSO3) were prepared and characterised for use ... -
Evaluation of the leachate chemistry and contaminants attenuation in acid mine drainage by fly ash and its derivatives
Gitari, Wilson Mugera (University of the Western Cape, 2006)The mining industry in South Africa has a huge potential to impact negatively on the environment. Negative impacts include generation of reactive tailings and acid mine drainage (AMD). AMD is highly acidic (pH 2-4), ... -
Frequency and voltage-modulated electrochemical aflatoxin B1 immunosensor systems prepared on electroactive organic polymer platforms
Owino, Joseph Hasael Odero (University of the Western Cape, 2008)In the presented work, immunosensors for detection of Aflatoxin B1 based on different immobilization platforms were studied. Synthesis of an electroactive hydrogel was also carried out. Aflatoxins are a group of mycotoxins ... -
Highly selective mesoporous sorbents for mercury removal from industrial wastewater
Godongwana, Ziboneni Governor (University of the Western Cape, 2011)The results of this study show that novel mesoporous carbons were obtained as inverse replica of SBA-15, HMS and MCM-41 silica templates, with a large pore diameter (2-4 nm), a BET surface area of 1867, 874 and 910 m2g–1 ... -
An investigation into the synthesis, characterisation and some applications of novel metal-containing polymers and dendrimers of transition metals
Smith, Gregory Stuart (University of the Western Cape, 2003)metal-containing complexes, that exhibit enhanced chemical and physical properties. This thesis describes the synthesis of new metal-containing linear polymers and dendritic molecules. Chapter 1 presents an overview of ... -
Mercaptobenzothiazole-on-Gold Biosensor Systems for Organophosphate and Carbamate Pesticide Compounds
Somerse, Vernon Sydwill (University of the Western Cape, 2007)This study firstly reports the development, characterisation, and application of thick-film acetylcholinesterase (AChE) biosensors based on a gold electrode modified with a mercaptobenzothiazole (MBT) self-assembled monolayer ... -
Nanoparticulate of silver-modified poly (8-anilino-1-naphthalene sulphonic acid) nanobiosensor systems for the determination of Tuberculosis treatment drugs
Ngece, Rachel Fanelwa (University of the Western Cape, 2011)This study firstly reports the development and characterization of PVP-AgNPs, PANSA and PVPAgNPs/ PANSA nanocomposite on gold. AFM and TEM analyses revealed highly electroactive nanocomposites whose morphogy and properties ... -
Nanostructured polypyrrole impedimetric sensors for anthropogenic organic pollutants
Akinyeye, Richard Odunayo (University of the Western Cape, 2007)Polypyrrole composites of polyaromatic hydrocarbon sulphonic acids (β–naphthalene sulphonic acid (NSA) and 1, 2-napthaquinone-4-sulphonic acid (NQS)), as well as those of transition metal oxides (tungsten (VI) oxide (WO3) ... -
One-Dimensional nanostructured polymeric materials for solar cell applications
Mavundla, Sipho Enos (University of the Western Cape, 2010)This work entails the preparation of various polyanilines with different morphologies and their application in photovoltaic solar cells. Zinc oxide (ZnO) with one-dimensional and flower-like morphology was also prepared ... -
Preparation and characterization of highly active nano pt/c electrocatalyst for proton exchange membrane fuel cell
Ying, Qiling (University of the Western Cape, 2006)Catalysts play an essential role in nearly every chemical production process. Platinum supported on high surface area carbon substrates (Pt/C) is one of the promising candidates as an electrocatalyst in low temperature ... -
Preparation and physico-chemical properties of nickel nanostructured materials deposited in etched ion-track membrane
Nkosi, Mlungisi Moses (University of the Western Cape, 2005)The development of finely dispersed powders and superfine-grained materials intended for application in various areas of science and engineering is one of the challenges facing modern nanotechnology. Thus, specific fundamental ...