Browsing Department of Chemistry by Title
Now showing items 317-336 of 403
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Scalable synthesis of innovative silicon/carbon nanocomposite for next generation lithium-ion battery anodes
(University of the Western Cape, 2022)Silicon is the most promising lithium-ion battery (LIB) anode due to its ultra-high capacity (4200 mAh/g), which is 10 times greater than commercially available graphite anodes (372 mAh/g). Utilizing this large capacity ... -
Secondary metabolites of the uromycladium tepperianum macalpine epiphytic fungus
(University of the Western Cape, 2021)Research on natural products and medicinal plants has been conducted more with each passing year due to the great interest in isolating bioactive compounds and secondary metabolites from natural products such as plants, ... -
Secondary metabolites of the uromycladium tepperianum McAlpine epiphytic fungus
(University of the Western Cape, 2021)Research on natural products and medicinal plants has been conducted more with each passing year due to the great interest in isolating bioactive compounds and secondary metabolites from natural products such as plants, ... -
Silver-coated polyethene terephthalate membrane for detection of pharmaceuticals using surface-enhanced Raman spectroscopy
(University of the Western Cape, 2017)Surface-enhanced Raman spectroscopy (SERS) has emerged as one of the analytical tools for detection of micro pollutants in the aquatic environment. The SERS technique is touted to have fingerprinting capability, specificity, ... -
Solid phase micro extraction: an alternative technique for the determination of volatile orgnanic compounds in groundwater
(University of the Western Cape, 2004)Standard methods for sample preparation use toxic organic solvents and can be replaced by utilizing a new sample preparation and concentration technique. One such technique, compatible with capillary gas chromatography was ... -
Some new bimetallic nickel and palladium complexes for catalysis applications
(University of the Western Cape, 2015)This thesis reports on the syntheses of new bimetallic iminopyridyl nickel(II) and palladium(II) complexes as catalyst precursors for ethylene ligomerization/polymerization. Tetrahydrophenyl-linked iminopyridyl ligands, ... -
Sorption properties of natural zeolites for the removal of ammonium and chromium ions in aqueous solution
(University of the Western Cape, 2011)There are huge amount of natural clinoptilolite available in South Africa which can be utilised for wastewater treatment of ammonia and chromium if their characteristics are properly known. However, these deposits have not ... -
Spectroelectrochemical determination of the antioxidant properties of carpobrotus mellei and carpobrotus quadrifidus natural products
(University of the Western Cape, 2009)South African Carpobrotus species have been found to contain hydrolysable tannins, various tlavonoids e.g. rutin and hyperoside, phytosterols and aromatic acids which have a diverse range of pharmacological properties ... -
Spectroelectrochemical graphene-silver/zinc oxide nanoparticulate phenotype biosensors for ethambutol and pyrazinamide
(University of the Western Cape, 2019)Tuberculosis (TB), a deadly disease second to HIV/AIDS, is a global health problem. Diagnosis of active tuberculosis is tedious and requires expensive procedures since there is no recognizable method for sole detection ... -
Structural investigation of the natural products composition of selected South African seaweeds.
(University of the Western Cape, 2014)Recently, a great deal of interest has developed towards the isolation of bioactive compounds from marine sources due to their numerous health benefits. Furthermore, marine algae are valuable sources ... -
Studies of chemical constituents on the aerial parts of pelargoniumcapitatum
(University of the Western Cape, 2017)Pelargonium capitatum is a plant that is popular in essential oils. The isolated essential oil constituents from the flowers and leaves of the plant were obtained by hydrodistillation followed by GC-MS analysis. The following ... -
Studies on some biologically active natural products from Tulbaghia Alliacea
(University of the Western Cape, 2005)It is believed that early humans had knowledge of how to use traditional medicinal plants, but the knowledge has been partially lost as society underwent various changes leading to new civilizations. The aim of this study ... -
Substituted nick el pyrazole and palladiumpyruzolyl complexes as catalyst precursors for ethylene polymeization
(University of the Western Cape, 2003)This study concerns the synthesis of pyrazole and substituted pyrazole nickel complexes of the type [(3,5-R,R',pz)2NiB rz ( Pz : pyrazole; R = R' = cHr (1), tBu (a)l and of the type [(3,5-R,R'pz)aNiBrz R: H, R' : CHr ... -
Supercapacitor development from transition metal-integrated spinel manganese oxide-carbon nanotubes composite materials
(University of the Western Cape, 2019)Supercapacitors are electrochemical energy storage devices, much like Li-ion batteries, that have expeditiously been improved over the years through extensive research conducted in material sciences and nanotechnology. ... -
Supercapacitor electrode materials based on nanostructured conducting polymers and metal oxides
(University of the Western Cape, 2013)Supercapacitors are charge-storage devices. Compared to batteries, they have higher power density, more excellent reversibility and longer cycle life. Therefore, supercapacitors have played an increasingly important role ... -
Supported catalysts for CO2 cycloaddition reactions
(University of the Western Cape, 2022)Carbon dioxide (CO2) is a major greenhouse gas (GHG) released into the environment due to increasing human activities. Cyclic carbonates on the other hand, are valuable compounds with several functions such as, polar ... -
Supported metal catalysts for friedel-crafts alkylation
(2013)The research focused on the synthesis, characterisation and activity of zeolite supported metal catalysts for the Friedel-Crafts alkylation of benzene with t-butyl chloride. Alkyl benzenes are traditionally produced via ... -
Sustainable synthesis of BEA zeolite from fly ash-based amorphous silica
(University of Western Cape, 2019)Power generation in South Africa depends majorly on the combustion of coal and the increasing demand for energy due to industrialisation and population growth signifies the continuous consumption of coal. During this ... -
Swift heavy ion irradiation of polyester and polyolefin polymeric film for gas separation application
(University of the Western Cape, 2015)The combination of ion track technology and chemical etching as a tool to enhance polymer gas properties such as permeability and selectivity is regarded as an avenue to establish technology commercialization and enhance ...