A5038210367- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Conducting polymers and applications
- Corrosion Behavior and Inhibition
- Nanoparticles: synthesis and applications
- Analytical Chemistry and Sensors
- Concrete Corrosion and Durability
- Perovskite Materials and Applications
- Electrospun Nanofibers in Biomedical Applications
- Quantum Dots Synthesis And Properties
- Medicinal Plants and Neuroprotection
- Advanced Nanomaterials in Catalysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Gas Sensing Nanomaterials and Sensors
- Extraction and Separation Processes
- ZnO doping and properties
- Analytical chemistry methods development
- Carbon Nanotubes in Composites
- Carbon and Quantum Dots Applications
- Copper-based nanomaterials and applications
- Moringa oleifera research and applications
- Magnesium Oxide Properties and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced biosensing and bioanalysis techniques
North-West University
2016-2025
University of South Africa
2023
Rhodes University
2013-2014
This study assessed the antimicrobial efficacy of synthesized zinc oxide nanoparticles produced using aqueous extracts pomegranate leaves and flowers designated ZnO-NPs-PL, ZnO-NPs-PF. In study, oxides were successfully employed to fabricate from (Punica granatum). The obtained characterized spectroscopically. X-ray diffractive analysis (XRD) revealed elemental components nature particles. fabricated nanoparticle (ZnO-NPs) showed a crystalline structure. morphology as shown by scanning...
Nanocomposites of ZnO and some selected polymers, namely, poly(ethylene glycol), poly(vinylpyrrolidone), polyacrylonitrile, were synthesized characterized using Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-vis) thermogravimetric analysis (TGA), transmission electron microscopy (TEM) techniques. The FTIR UV-vis spectra confirmed the successful formation polymer nanocomposites. TGA results revealed that nanocomposites are more thermally stable than polymers alone....
A simple and cost-effective material composed of polyacrylonitrile nanofibers containing different concentrations moringa (MR) leaf extracts was fabricated for antimicrobial properties wound dressing. The materials were characterized by scanning electron microscopy, thermal gravimetric analysis, Fourier transmission infrared spectroscopy. antibacterial sensitivity the developed polyacrylonitrile-moringa extract evaluated against Staphylococcus aureus Escherichia coli agar diffusion method....
The electrochemical response of serotonin on the modified electrode based multiwalled-carbon-nanotube (MWCNT) doped respectively with nickel, zinc and iron oxide nanoparticles coating glassy carbon (GCE) at physiological pH 7 was determined using cyclic voltammetry (CV) square wave (SWV). GCE/MWCNT-metal electrodes exhibited excellent electrocatalytic activity towards detection large peak current lower oxidation potentials compared to other investigated. dynamic range for determination...
Abstract The electrocatalytic properties of metal oxides (MO = Fe 3 O 4 , ZnO) nanoparticles doped phthalocyanine (Pc) and functionalized MWCNTs, decorated on glassy carbon electrode (GCE) was investigated. Successful synthesis the oxide MO/Pc/MWCNT composite were confirmed using UV-Vis, EDX, XRD TEM techniques. modification GCE with MO their also cyclic voltammetry (CV) technique. GCE-MWCNT/ZnO/29H,31H-Pc best towards DA detection very low limit (0.75 μM) which compared favourably...
Synthesis of metallic and semiconductor nanoparticles through physical chemical routes has been extensively reported. However, green synthesized metal are currently in the limelight due to simplicity, cost-effectiveness eco-friendliness their synthesis. This study explored use aqueous leaf extract Costus afer synthesis silver (CA-AgNPs). The optical structural properties resulting were studied using UV-visible spectroscopy, scanning electron microscopy (SEM), transmission (TEM) Fourier...
Electrochemical properties and sensor application of multi-walled carbon nanotubes (MWCNTs), doped with metal oxides [(MO=nickel oxide (NiO), zinc (ZnO) iron (Fe 3 O 4 )] nanoparticles was investigated using FTIR, XRD, UV-vis spectroscopy, Raman TEM, SEM, EDX, cyclic voltammetry techniques.Electrochemical oxidation dopamine on a glassy electrode (GCE) modified (GCE/MWCNT/NiO, GCE/MWCNT/ZnO, GCE/MWCNT/Fe ) examined by voltammetry, EIS square wave in 0.1 M phosphate buffer solution PBS at pH...
The current study compared the synthesis, characterization and properties of copper oxide nanoparticles (CuO) based on green traditional chemical methods. synthesized CuO were confirmed by spectroscopic morphological such as ultraviolet-visible (UV-vis) spectroscopy, fourier transform infrared (FTIR) zeta potential, scanning electron microscopy (SEM) energy dispersed X-ray (EDX). Electrochemical behavior modified electrodes was done using cyclic voltammetry (CV) in ferricyanide/ferrocyanide...
The inhibition of mild steel deterioration via organic substances has become popular nowadays. Among the myriads applied as potential inhibitors, quinoxalines stand out toxic-free, cheap and effective compounds in different electrolytes. This report investigates computational aspects selected quinoxaline tested suppressors HCl medium using quantum chemical method (Density Functional Theory, DFT) quantitative structure property relationship (QSPR). Feature selection tool was utilized to...
The inhibition of the corrosion N80 steel in 3.5 wt. % NaCl solution saturated with CO2 by four porphyrins, namely 5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23H-porphyrin (HPTB), 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphyrin (T4PP), 4,4′,4″,4‴-(porphyrin-5,10,15,20-tetrayl)tetrakis(benzoic acid) (THP) and 5,10,15,20-tetraphenyl-21H,23H-porphyrin (TPP) was studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, scanning microscopy (SECM) electron (SEM)...
The effects of seven macrocyclic compounds comprising four phthalocyanines (Pcs) namely 1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanine (Pc1), 2,3,9,10,16,17,23,24-octakis(octyloxy)-29H,31H-phthalocyanine (Pc2), 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (Pc3) and 29H,31H-phthalocyanine (Pc4), three naphthalocyanines 5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine (nPc1), 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (nPc2) 2,3-naphthalocyanine (nP3) were investigated...
Abstract Molecularly imprinted polymers (MIPs) have been widely used for the modification of electrodes because their native specificity intrinsic template molecules. The importance catecholamines in neurological and general well‐being every individual cannot be overemphasized. Disorders associated with imbalance catecholamine levels can diagnosed electrochemical sensors capable determination presence other biological interferents extracellular fluids. MIPs based designed selective...
Green synthesis of nanoparticles using citrus peel extracts is known to be environmentally friendly and non-toxic when compared chemical methods. In this study, different obtained with the solvents acetone distilled water were used synthesize copper oxide (CuONPs). The characterized cyclic voltammetry, ultraviolet-visible spectroscopy, energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), scanning (SEM) Fourier-transform infrared (FTIR). absorption spectrum...
Ascorbic acid (AA) is an essential vitamin in the body, influencing collagen formation, as well norepinephrine, folic acids, tryptophan, tyrosine, lysine, and neuronal hormone metabolism. This work reports on electrochemical detection of ascorbic oranges using screen-print carbon electrodes (SPCEs) fabricated with multi-walled nanotube- antimony oxide nanoparticle (MWCNT-AONP) nanocomposite. The nanocomposite-modified electrode displayed enhanced electron transfer a better electrocatalytic...
Metal oxides NPs synthesized using orange peels extract (OE) and lemon (LE) polyaniline (PANI) were used to modify the surface of screen printed carbon electrode (SPCE). The electrochemical responses various working in potassium hexacyanoferrate (III) probe, HCl electrolyte evaluated cyclic voltammetry. Integrating bimetal Cu2O/ZnO with PANI on SPCE increased electron transport properties sensors. analytical performance treated OE/Cu2O/ZnONPs/PANI composite, (OE/ZnO/Cu2ONPs/PANI/SPCE) their...