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Room temperature gas sensing characteristics of titanium dioxide nanostructures: effects of hydrochloric acid on the structure and magnetic properties
(University of the Free State, 2016-01)
Monitoring and detection of toxic and combustible gases such as methane in underground mining, carbon monoxide from burning coal in our homes and odourless gases such as nitrogen dioxide and sulphur dioxide in industries ...
Properties evaluation of electrospun alginate-based nanofibrous membranes for filtration applications
(University of the Free State (Qwaqwa Campus), 2016-12)
This study entails the electrospinning of a sodium alginate (SA) natural polymer with the aid of an electrospinnable synthetic polymer, polyethylene oxide (PEO), in order to develop nanofibrous-based membranes for wastewater ...
Synthesis and characterization of Ce³⁺ doped silica (SiO₂) ) nanophosphors co-doped with Al³⁺ or Mg²⁺ ions
(University of the Free State (Qwaqwa Campus), 2009-11)
In recent studies, amorphous silica (SiO2) has been used as a host matrix for rare-earth ions to prepare luminescent materials that can be used in various light emitting devices. Sol-gel glasses have the potential to hold ...
Simulating the formation of Pt nanostructures utilizing molecular dynamic calculations
(University of the Free State, 2014)
Platinum (Pt) is an important catalyst for applications such as catalytic converters. In this thesis the formation of platinum nanoparticles was investigated by means of simulations. For the first part of the thesis a ...
Nanoscale model catalysts supported by metal organic frameworks
(University of the Free State, 2009-11)
English: The aim of this study was to use square planar platinum(II) and palladium(II) complexes for the synthesis of bridged complexes and as building blocks for the subsequent construction of two dimensional metal organic ...
Synthesis and absorptive properties of metal-loaded nano-sized zinc zeolitic 2-methlimidazolate frameworks (ZIF-8) with applications in heterogeneous catalysis
(University of the Free State, 2014)
Zeolitic Imidazole Framework-8 nanoparticles, a subclass of Metal Organic Frameworks, were successfully synthesized with particle size control by temperature, using isothermal benchtop reactions in methanol. As the synthesis ...
The synthesis and characterization of the ZnO nanoparticles
(University of the Free State (Qwaqwa Campus), 2011-11)
ZnO has been by far the most interesting semiconductor because of its properties. The ZnO nanostructures were synthesized by a sol-gel method and the samples were annealed in air at various temperatures capped with polymers ...
Material properties of semiconducting nanostructures synthesized using the chemical bath deposition method
(University of the Free State (QwaQwa Campus), 2013-11)
The recent global research interest in wide band gap semiconductors has been focused on zinc oxide (ZnO) due to its excellent and unique properties as a semiconductor material. The high electron mobility, high thermal ...
Novel ZnO nanostructures: synthesis, growth mechanism, and applications
(University of the Free State (Qwaqwa Campus), 2014-12)
The ZnO nanostructures were successfully synthesized by chemical bath deposition method (CBD) to study the influence of parameters such as reaction temperature, time, precursor concentration and the annealing temperature ...
Synthesis and characterization of down−conversion nanophosphors
(University of the Free State, 2014-10)
Luminescent zinc aluminate (ZnAl2O4) nanoparticles, crystalline–low quartz and amorphous silica powders were incorporated with Ce3+ and Tb3+ ions. These powders were successfully synthesized by the solution combustion and ...