A5030528131- Nanomaterials for catalytic reactions
- Advanced Cellulose Research Studies
- Pickering emulsions and particle stabilization
- Asymmetric Hydrogenation and Catalysis
- Mesoporous Materials and Catalysis
- Biofuel production and bioconversion
- Catalysis for Biomass Conversion
- Anaerobic Digestion and Biogas Production
- Catalysis and Hydrodesulfurization Studies
- Thermochemical Biomass Conversion Processes
- Microbial Metabolic Engineering and Bioproduction
- Phenothiazines and Benzothiazines Synthesis and Activities
- Nanocomposite Films for Food Packaging
- Synthesis and Biological Evaluation
- Extraction and Separation Processes
- Zeolite Catalysis and Synthesis
- Petroleum Processing and Analysis
- Clay minerals and soil interactions
- Proteins in Food Systems
- Electrohydrodynamics and Fluid Dynamics
- Synthesis and biological activity
- Electrochemical sensors and biosensors
- Layered Double Hydroxides Synthesis and Applications
- Oil Spill Detection and Mitigation
- Innovative Microfluidic and Catalytic Techniques Innovation
Nelson Mandela University
2024
University of Johannesburg
2020-2023
Isolation and hydrophobic modification of cellulose from oil palm empty fruit bunch (OPEFB) its capacity to act as Pickering emulsion stabilizer was studied. The isolated hydrophobically functionalized with acid chloride (benzoyl chloride) in aqueous medium. Proximate analysis indicated that is a valuable source hemicellulose cellulose. X-ray diffraction (XRD) revealed crystallinity index (CrI) (CB) benzoylated (MCB) be 66.12% 61.38% respectively. Both Thermogravimetric (TGA) Differential...
The drastic surplus of glycerol resulting from biodiesel production requires an effective catalytic valorization to ensure industry's sustainability. Herein, a series highly crystalline ZrO2 with mesopore structure were prepared via the inverse micelle technique. Under mild conditions, meso-ZrO2 showed good stability and selectivity 1,3-dioxane larger than 50% in solvent-free acetalization aldehydes. performance was attributed high surface area Lewis acidity. We believe that green...
This study investigated Pickering emulsions stabilized by hydrophobically modified cellulose from oil palm frond (OPF). The Cellulose modification was performed in aqueous medium using benzoyl chloride as modifying agent. Characterizations showed that isolated native (NC) suffered no structural degradation while surface and improved thermal properties observed the (CB-10). Proximate analysis revealed is a good source of hemicellulose. x-ray diffraction (XRD) crystallinity index (CrI) NC...
Nanoremediation approaches have been applied to remove oil from surface and ground water as spills found long-term negative consequences for the ecosystem. via nanosorption mechanism of different environmental matrices in world at large is its formative stages despite alarming extensive prevalence petroleum related pollution. Over 9 million barrels leaked last five decades, making that ecosystem one most deteriorated by exploration extraction activities. The goal this research assess current...
To establish an environmentally friendly green chemical process, we minimized and resolved a significant proportion of waste hazards associated with conventional organic acids molecular gases, such as carbon monoxide (CO).
N’-(2-pyridinylmethylene)nicotinohydrazide A, N’-(4-pyridinylmethylene)nicotinohydrazide B, N’-(2- ethoxybenzylidene)nicotinohydrazide C, N’-(4- ethoxybenzyldene)nicotinohydrazide D and N’-(2-hydroxyl-5-methoxybenzylidene)nicotinohydrazide E, was prepared by refluxing the ethanolic solution of nictonic acid hydrazide solutions 2-pyridinrcarboxaldehyde, 4-pyridinecarboxaldehyde, 2-ethoxybenzaldehyde, 4-ethoxybenzaldehyde 2-hydroxy-5-methoxybenzaldehyde in 1:1 mole ratio for 4 hours a separate...
Abstract An eco‐friendly alkali‐promoted (Cs−Au/Co 3 O 4 ) catalyst, with redox and basic properties for the oxidative dehydrogenative coupling of anilines to symmetrical unsymmetrical aromatic azo compounds, was developed. We realized a base additive‐ molecular 2 oxidant‐free process (using air), reasonable reusability catalyst achieved under milder reaction conditions. Notably, enhanced catalytic activity also linked increased site concentration, low reduction temperatures, effect lattice...
Abstract Surface‐active and highly stable cobalt nanoparticles generated from alkali ion‐promoted gold catalyst for catalyzed carbonylative [2+2+1] cyclization reaction, is described. The nanoparticle‘s (AuNPs) role was assumed to dissociate the CO H 2 into atomic species on surface by spillover, which in‐situ reduces robust mesoporous oxide metallic (Co 3+ →Co 2+ →Co), as active catalytic that reaction; thereby providing up 93 % yield of cyclopentenone adducts. Prior this, pre‐treatment...
The use of water as a solvent in chemical reactions has recently been brought to public attention, especially the exploration eco-friendly procedures. It is readily available, abundantly accessible, non-toxic, non-flammable, and at low cost. As opposed previous limitation reactant solubilities associated with aqueous media, hydrogel such hydroxypropyl methylcellulose (HPMC) solution can significantly improve solubility. This investigation employed HPMC reaction solvent, medium viscosity was...
The objective of this study was to explore the preparation and characterisation acetate cellulose laurate ester in sodium acetate/zinc chloride systems. used obtained from oil palm empty fruit bunch frond. characterization both isolated carried out using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Differential thermogravimetric (DTG), Thermogravimetric analysis (TGA). FT-IR revealed presence C=O, confirming its modification. crystallinity found be 67-72% 51-54%,...