Browsing Philosophiae Doctor - PhD (Chemistry) by Title
Now showing items 72-91 of 133
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Investigation of ternary catalysts as anode catalysts for direct methanol fuel cell
(University of the Western Cape, 2023)This chapter reports on various catalyst synthesis methods (impregnation, polyol, modified polyol and microwave-assisted modified polyol methods) to determine which method would result in the most electrochemically active ... -
Ionophoric and aptameric recognition-modulated electroactive polyaniline films for the determination of tetrodotoxin
(University of the Western Cape, 2014)Tetrodotoxin (TTX) is a nonpeptidic neurotoxin with a high rate of food poisoning mortality (60%) that has been associated with the consumption of diets from puffer fish and mud snails harbouring TTX-producing bacteria. ... -
Isolation and characterization of natural products from selected Rhus species
(University of Western Cape, 2020)Searsia is the more recent name for the genus (Rhus) that contains over 250 individual species of flowering plants in the family Anacardiaceae. Research conducted on Searsia extracts to date indicates a promising potential ... -
Mercaptobenzothiazole-on-Gold Biosensor Systems for Organophosphate and Carbamate Pesticide Compounds
(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 ... -
Metallic nanoparticles with polymeric shell: A multifunctional platform for application to biosensor
(University of the Western Cape, 2018)Tuberculosis (TB) is an airborne disease caused by Mycobacterium tuberculosis (MTB) that usually affects the lungs leading to severe coughing, fever and chest pains. It was estimated that over 9.6 million people worldwide ... -
Method development for selective recovery of rare earths elements from phosphogypsum waste
(University of Western Cape, 2021)The need for rare earth elements (REEs) in current technologies has motivated countries with high imports dependency to search for alternatives sources. Several studies have been carried out to investigate the feasibility ... -
Microfluidic graphenised-paper electroanalytical devices (μGPED) for adsorptive cathodic stripping voltammetric detection of metal contaminants
(University of the Western Cape, 2017)The need for clean, non-toxic drinking water supplies, free of pollutants and metal contamination is vital in impoverished areas and the developing world alike. With this in mind, the development of accurate, inexpensive, ... -
Microwave synthesized ruthenium antimony oxide-graphene nanocomposite materials for asymmetric supercapacitors
(University of the Western Cape, 2022)With the rapid rise in energy demand and ever-escalating environmental hazards, the need for transition from fossil fuel to renewable energy sources is of paramount importance, requiring better and efficient energy storage ... -
Modification of nanostructured carbon based supports for direct methanol fuel cells
(University of the Western Cape, 2022)Palladium (Pd) and Palladium-Ruthenium (Pd-Ru) nanoparticles supported by various carbon nanomaterials which include graphene oxide (GO), reduced graphene oxide (rGO) and multiwalled carbon nanotubes (MWCNTs) with their ... -
Molecularly imprinted polymer sensor systems for environmental estrogenic endocrine disrupting chemicals
(University of the Western Cape, 2018)There is growing concern on endocrine disrupting compounds (EDCs). The presence of drugs in water supplies was first realized in Germany in the early 1990s when environmental scientists discovered clofibric acid. Clofibric ... -
Mononuclear and multinuclear salicylaldimine metal complexes as catalysts precursors in the oxidation of phenol and cyclohexene
(2009)In this thesis typical homogeneous and dendritic immobilized catalysts derived from salicylaldimines were investigated as catalysts for the oxidation of hydrocarbons using hydrogen peroxide as oxidant under aerobic ... -
Nanoparticulate of silver-modified poly (8-anilino-1-naphthalene sulphonic acid) nanobiosensor systems for the determination of Tuberculosis treatment drugs
(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 light weight hydrogen storage materials
(University of the Western Cape, 2012)The main objective of this study was to advance kinetic performances of formation and decomposition of magnesium hydride by design strategies which include high energy ball milling in hydrogen (HRBM), in combination with ... -
Nanostructured polyamic acid electrocatalysts for reliable analytical reporting of sulphonamides as contaminants of emerging concern
(University of the Western Cape, 2019)Polyamic acid (PAA) nanostructured materials were successfully produced by electrochemical deposition and electrospinning using polyvinlypyrrolidone (PVP) as supporting polymer. Polyamic acid thin film and nanofibers were ... -
Nanostructured polypyrrole impedimetric sensors for anthropogenic organic pollutants
(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) ... -
Next generation bulk Heterojunction organic Photovoltaic and light emitting diode sytems of Novel Polycyclic Aromatic Hydrocarbon, Polyfluorenes and Polythiophenes
(University of the Western Cape, 2017)In these times of diminishing reserve of fossil fuel, the development of novel - green or renewable? technologies to meet the increasing worldwide demand for energy is of great importance. The sun is the largest carbon ... -
Novel aromatic dendritic-co-poly(3-hexylthiophene) composites for photovoltaic cell application
(University of Western Cape, 2021)Fossil fuels are part of fuels that are formed from natural processes and they are called non-renewable sources of energy. These include natural gas, coal and oil. They have been used for decades to produce energy globally. ... -
Novel Nanostructure Electrocatalysts for Oxygen Reduction and Hydrogen Evolution Reactions
(University of Western Cape, 2020)widespread use of fossil energy has been most convenient to the world, while they also cause environmental pollution and global warming. Therefore, it is necessary to develop clean and renewable energy sources, among which, ... -
Novel nanostructure electrocatalysts for oxygen reduction and hydrogen evolution reactions
(University of the Western Cape, 2020)The widespread use of fossil energy has been most convenient to the world, while they also cause environmental pollution and global warming. Therefore, it is necessary to develop clean and renewable energy sources, among ... -
Novel Nanostructure Electrocatalysts for Oxygen Reduction and Hydrogen Evolution Reactions
(University of the Western Cape, 2019)The widespread use of fossil energy has been most convenient to the world, while they also cause environmental pollution and global warming. Therefore, it is necessary to develop clean and renewable energy sources, among ...