Letlhogonolo Mabena

Tshwane University of Technology | tut · Department of Chemistry

Oxidative transformation of phenols is an efficient route towards the production of moieties for naturally occurring quinones with a wide range of biological activities. Silica supported Ru−Bi catalysts were prepared by microwave‐assisted loading (MW) and deposition (DP) methods. The as‐prepared catalysts were characterized by XRD (X‐ray diffractio...

In this paper, the pseudocapacitive performance of nitrogen-doped and undoped reduced graphene oxide/tetragonal hausmannite nanohybrids (N-rGO/Mn3O4 and rGO/Mn3O4) synthesized using a one-pot hydrothermal method is reported. The nanohybrid electrode materials displayed exceptional electrochemical performance relative to their respective individual...

The current interest in energy storage systems (ESSs) is primarily due to the environmental concerns of the harmful carbon print emissions from the fossil fuels used presently. The development of energy storage systems (ESSs) comes as a crucial factor when it comes to addressing the energy problems arising due to the rapid development of the global...

There are concerns regarding the depletion of the fossil-fuel resources and the destruction of the environment accompanied with drastic climate changes. Hence, researchers have derived attention on looking for an alternative clean, sustainable renewable, highly efficient energy conversion and storage technologies/systems. The fuel cell is one of th...

A comparison of three different purification procedures for multi-walled carbon nanotubes (MWCNTs) produced by chemical vapour deposition (CVD) has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H2O2, hydrothermal treatment and acid refluxing in HCl. Sample purity was documented with the Raman spe...

Multi-walled carbon nanotubes (MWCNTs) were synthesized a by chemical vapour deposition method. The effect of calcination at temperatures ranging from 300 to 550°C in exposing the metal nanoparticles within the nanotube bundles was studied. The degree of degradation of the structural integrity of the MWCNTs during the thermal process was studied by...

A comparison of different purification procedures for single walled carbon nanotubes (SWCNTs) synthesized by laser-vapourization has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H2O2, hydrothermal treatment and acid refluxing in HCI. Sample purity is documented with Raman spectroscopy, Transmiss...

A comparison of different purification procedures for single walled carbon nanotubes (SWCNTs) synthesized by laser-vapourization has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H 2 O 2 , hydrothermal treatment and acid refluxing in HCl. Sample purity is documented with Raman spectroscopy, Trans...