Adeniyi S Ogunlaja

Adeniyi S Ogunlaja
Nelson Mandela University | NMMU · Department of Chemistry

Doctor of Philosophy

About

85
Publications
13,085
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
722
Citations
Citations since 2017
53 Research Items
586 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150

Publications

Publications (85)
Article
Carbon dioxide (CO2) is the most important greenhouse gas (GHG), accounting for 76% of all GHG emissions. The atmospheric CO2 concentration has increased from 280 ppm in the pre-industrial era to about 417.86 ppm, and is projected to reach 570 ppm by the end of the 21st century. In addition to reducing CO2 emissions from anthropogenic activities, s...
Article
Full-text available
The recovery of extra-heavy oil has been challenging due to high viscosity. In this research, a hybrid recovery scheme involving co-injection of heat producing chemicals termed thermochemical fluid (TCF), and ionic liquid (IL): 1-Benzyl-3-methylimidazolium chloride, has been investigated. The studies include asphaltene dispersion tests in the IL, m...
Article
Full-text available
In spite of remarkable progress and success made in anticancer research, major challenges in treatment of cancer remain recurrence of tumour and adverse effects of anticancer drugs. The search for novel, effective and safe anticancer agents, therefore remains important. This study investigated the chemical constituents of Phaulopsis falcisepala, a...
Article
Full-text available
In the search for new `sulfa drugs' with therapeutic properties, o -nitrosulfonamides and N -cycloamino- o -sulfanilamides were synthesized and characterized using techniques including ¹ H NMR, ¹³ C NMR and FT–IR spectroscopy, and single-crystal X-ray diffraction (SC-XRD). The calculated density functional theory (DFT)-optimized geometry of the mol...
Article
Full-text available
Here, we report the Cu(II)-photocatalysed hydrocarboxylation of imines (C=N) from a series of synthesized Schiff Base derivatives, namely (E)-1-(4-((4-methylbenzylidene)amino)phenyl)ethanone, (E)-1-(3-((5-bromo-2-hydroxybenzylidene)amino)phenyl)ethanone, (E)-4-((5-bromo-2-hydroxybenzylidene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one, and (E)...
Article
Full-text available
The current paper describes the use of a sodium alginate stabilized magnetite (AFe) nanocomposite to encapsulate amoxicillin (AMX) as an antibacterial therapy against gram-positive and gram-negative bacteria, Listeria monocytogenes and Salmonella typhi, respectively. The use of alginate provides various functional groups and expanded active sites f...
Article
Full-text available
Two calcium coordination compounds [Ca(2,6-Hpdc)2(H2O)2] 1 and [Ca2(2,3-pdc)2(H2O)6]n2 (where 2,6-H2pdc = 2,6-pyridinedicarboxylic acid and 2,3-H2pdc = 2,3-pyridinedicarboxylic acid) were grown at room temperature. The compounds were characterized using elemental analysis, Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis,...
Article
Full-text available
The global demand on adipic usage in the production of plasticizers and synthetic polyamide is increasing. In line with the search for an efficient and energy-conserving way to isolate adipic acid (AA) in good yields, this paper introduces the oxidization of cyclohexanone utilizing two new coordination compounds, [Mn(2,6-pydc)2](imi) (1) and [Co(H2...
Article
In this study, UiO-66-NH2 was synthesized and incorporated with graphene aerosol (UiO-66-NH2/GA) and ethylenediamine functionalized graphene oxide (UiO-66-NH2/GO-NH2). These composites were characterized using infrared spectroscopy, powder X-ray diffraction, ultraviolet–visible light spectroscopy, scanning electron microscope, and energy-dispersive...
Article
Full-text available
Reliance on crude oil remains high while the transition to green and renewable sources of fuel is still slow. Developing and strengthening strategies for reducing sulfur emissions from crude oil is therefore imperative and makes it possible to sustainably meet stringent regulatory sulfur level legislations in end-user liquid fuels (mostly less than...
Article
Herein a pH-adjusted chemical precipitation method is reported for in-situ formation of ternary Ag2O-Ag2CO3/g-C3N4 (AAG) composites in the presence of atmospheric CO2. For comparison, a Janus Ag2O-Ag2CO3 (AA) composite with fine and narrow size particles of high purity was also fabricated with AgNO3 and NaOH without g-C3N4 (GN). The thermal treatme...
Article
Metals complexed to organic ligands have attracted much attention as potential treatments for cancer. In this paper we present the synthesis and anticancer activity of four metal complexes [Cu(theo)2(H2O)3]·2H2O (1), Cu(theo)2bpy(H2O)·4H2O (2), Cu(theo)2phen(H2O)·5H2O (3), and [Mn(theo)2(H2O)4] (4) (Theo=theophylline; Bpy=1,2-bipyridine; Phen=1,10-...
Article
Full-text available
Hydrodesulfurization (HDS) is a widely used process currently employed in petroleum refineries to eliminate organosulfur compounds in fuels. The current hydrotreating process struggles to remove organosulfur compounds with a steric hindrance due to the electronic nature of the current catalysts employed. In this work, the effects of adding chelatin...
Article
Full-text available
Adsorption of problematic copper ions as one of the endocrine disruptive substances from aqueous solution onto nanoscale zerovalent iron (nZVI) was studied. The high pore size 186.9268 Å, pore diameter 240.753 Å, and BET surface area 20.8643 m² g⁻¹ and pH(pzc) enlisted nZVI as an efficient nano-adsorbent for treatment of heavy metals from synthetic...
Article
[Zn(hba)2(tmdp)]n (1), a Zn-coordination polymer (CP), prepared by the reaction of Zn(NO3)2•6H2O, 4-hydroxybenzoic acid (Hhba) and 4,4’- trimethylenedipyridine (tmdp) was reported. The compound was characterised, using CHN, single crystal and powder X-ray diffraction analysis, FT-IR, and TGA techniques. It exhibits a square pyramidal geometry, with...
Article
Full-text available
A luminescent Cobalt(II) co-crystal [Co13(PDC)16(H2O)24.7H2O] 1 (where H2PDC = 2,6-pyridinedicarboxylic acid) have been prepared by oven-heating and slow evaporation of solvent. Single crystal X-ray diffraction (SCXRD) analysis revealed that 1 is a mixture of complexes that crystallizes in the triclinic space group P-1 and the geometry around the C...
Article
We report the enhancement of the photocatalytic performance of CO2 reduction in H2O by introducing Co and reduced graphene (rGO) into TiO2 photocatalyst. The synthesized nanocomposites were characterized by a range of analyses including X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), ultraviolet–...
Article
The current paper describes the results of adsorptive performance of magnetite-sulphur nanocomposite (MSNP) for the removal of phosphate which causes eutrophication; providing algae nutrients to grow at alarming rate and therefore starve other aquatic organisms of much needed oxygen. The nanocomposite was prepared by ultrasonic-heating method using...
Article
ZnO (Z-1), Co-doped ZnO (Z-2), and Co-doped ZnO/rGO (Z-3) nanocomposites are successfully synthesized using a solvothermal method and investigated toward the photoreduction of CO 2 to CH 3 OH. The as-prepared ZnO (Z-1), Co-doped ZnO (Z-2), and Co-doped ZnO/rGO (Z-3) nanomaterials are characterized by a range of spectroscopic, imaging, and thermal t...
Article
Full-text available
A novel Zn(II) mixed‐ligand complex, Zn(nba) 2 (meim) 2 ( 1 ), synthesized from Zn(NO 3 ) 2 .6H 2 O, nitrobenzoic acid (Hnba) and 1‐methylimidazole (meim) is reported. The complex was characterized by elemental analysis, FT‐IR, powder and single crystal X‐ray crystallography and TGA/DSC. Complex 1 exhibits a tetrahedral geometry for Zn(II), which i...
Chapter
Desulfurization of fuel oils is an essential process employed in petroleum refineries to reduce the sulfur content to levels mandated for environmental protection. Hydrodesulfurization (HDS), which is currently being employed, is limited in treating refractory organosulfur compounds and only reduces the sulfur content in fuels to a range of 200-500...
Article
In the present study, we have described the synthesis and characterisation of theophylline hydrate (Theo hydrate), cocrystal (Theo-Phen.2H2O) and hydrated sodium co-crystal of theophylline (Na-(Theo)2ClO.2H2O), where Theo = Theophylline and Phen = 1,10-phenathroline. SC-XRD characterisation revealed strong interactions such as N···H···O, C=O···H an...
Article
Full-text available
In this study, glassy carbon electrodes modified with gold-polyaniline (Au-PANI) were evaluated for the ability to electrochemically oxidize dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). Au-PANI was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron...
Preprint
In recent years there has been a significant interest to design luminescent materials to detect explosives with a great degree of selectivity, sensitivity, and fast response time. Two new luminescent compounds, [Cu(Biphen) (Meim)(H 2 O)] 1 and [Co(BDC)(Meim) 2 ] n 2 (where HBiphen = biphenyl-4-carboxylic acid, H 2 BDC = 1,4-benzenedicarboxylic acid...
Article
Two novel Zn(II) coordination polymers (CPs), [Zn(nba) 2 (tmdp)] n (1) and [Zn(biphen) 2 (tmdp)] n (2), were synthesised by reacting Zn(NO 3) 2 Á6H 2 O and 4,4 0-trimethylenedipyridine (tmdp) with corresponding car-boxylates: 4-nitrobenzoic (Hnba) and 4-biphenylcarboxylic acid (Hbiphen). Their structures were characterized by elemental analysis, IR...
Article
We report here for the first time a facile strategy for the preparation of graphitic carbon nitride ( ) composited with different weight percentages of sulfur ( ) nanoparticles ( ), and their remarkable photocatalytic decontamination of toxic hexavalent chromium. Fabrication of the binary hybrid photocatalysts were carried out via two facile steps:...
Article
The title compound, 10-iodo-1,2-dihydroisoquinolino[2,1- b ][1,2,4]benzothiadiazine 12,12-dioxide, C 15 H 11 IN 2 O 2 S ( 8 ), was synthesized via the metal-free intramolecular N -iodosuccinimide (NIS)-mediated radical oxidative sp ³ -C—H aminative cyclization of 2-(2′-aminobenzenesulfonyl)-1,3,4-trihydroisoquinoline, C 15 H 16 N 2 O 2 S ( 7 ). The...
Article
Full-text available
The use of antioxidants has emerged as a promising therapeutic strategy for the management of mitochondrial dysfunction and other oxidative stress-related degenerative pathologies. Tetrapleura tetraptera is a well-known tree and its fruit is applied traditionally as spice and in the preparation of remedies for different ailments. In this study, t...
Article
Full-text available
Single pot system in chemical reduction via bottom-up approach was used for the synthesis of core shell nanoscale zerovalent iron (CS-nZVI). CS-nZVI was characterized by a combination of physicochemical and spectroscopic techniques. Data obtained showed BET surface area 20.8643 m²/g, t-Plot micropore volume 0.001895 cm³/g, BJH volume pores 0.115083...
Article
Three new compounds containing mono- and dinuclear Cu(II) complexes, [Cu(Met)2Cl2]2, Cu(H2O)(Met)2Cl]2 and [Cu(H2O)(phen)2]NO3 (Met= metronidazole; Phen= 1,10-phenathroline) have been synthesized and characterized by Infra-Red, UV-Vis, Single Crystal X-ray analyses, Thermogravimetric techniques and Scanning electron micrography. The biological acti...
Article
The preparation of cocrystals from active pharmaceutical ingredients (APIs) and biologically relevant coformers offers the opportunity of obtaining compounds with more desirable physicochemical and biological properties. This work focuses on theophylline-trimesic acid, caffeine-isophthalic acid, and caffeine-trimesic acid cocrystals. All the cocrys...
Article
Full-text available
One-pot synthesis of Co 3 O 4 nanocrystals on reduced graphene oxide (rGO) was carried out by reacting cobalt nitrate, L-arginine, extract of Laportae aestuans as oxidant, fuel and reducing agent, respectively, in a domestic microwave. Morphologies of Co 3 O 4 –rGo (RGCO) composite was elucidated using UV-Vis, FT-IR, TEM, SEM, EDX, XRD and photolum...
Article
Modified electrode (GCE/PAni/AgNP) was used for the electrochemical detection of sulfur containing compounds (SCCs) such as benzothiophene (BT), dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) in the presence of naphthalene (NP), thiourea (TH) and carbazole (CR). The electrochemical response of BT, DBT and 4,6-DMDBT was determin...
Chapter
Desulfurization of fuel oils is an essential process employed in petroleum refineries to reduce the sulfur content to levels mandated for environmental protection. Hydrodesulfurization (HDS), which is currently being employed, is limited in treating refractory organosulfur compounds and only reduces the sulfur content in fuels to a range of 200-500...
Article
A series of 5-coordinate oxidovanadium(IV) complexes based on 2-(2’-hydroxyphenyl)imidazole (HPIMH), with substituent groups of different electronegativities on the phenolic para position (HPIMX; X = -H, -Br, -OMe and -NO2), were synthesized and characterized. Three of these complexes were characterized by single crystal X-ray diffraction, [VIVO(PI...
Conference Paper
Full-text available
One-pot synthesis of cobalt oxide nanocrystals on reduced graphene oxide was carried out by reacting cobalt nitrate, L-arginine, extract of Laportae aestuans as oxidant, fuel and reducing agent, respectively, in a domestic microwave. Morphologies of cobalt oxide/reduced graphene oxide (RGCO) composite was elucidated using UV-Vis, FT-IR, TEM, SEM, E...
Article
The synthesis, structure and physical properties of a dinuclear copper(II) complex [Cu2(BAc)4(QX)2], and 2D zinc(II) Coordination polymer, [Zn(TDPA)2(TMPy)2]n, (where HBAc= 4-hydroxyl benzoic acid; QX= quinoxaline; HTDPA = 3,3-thiodipropionic acid; TMPy = 4,4-Trimethylenedipyridine) were presented. The complexes were characterised by elemental anal...
Article
Full-text available
This study investigated the combustion behavior and evolved greenhouse gases of coal, Scenedesmus microalgae, and coal-Scenedesmus microalgae blends (Coalgae® 5–20%) in air using a thermogravimetric analyzer (TG)-mass spectrometer (MS). Coalgae® refers to a blend of coal fines and microalgae biomass. TG-DTG curves of coal and microalgae confirmed t...
Article
Full-text available
The search for novel, safe and effective anticancer agents has been a continuous and recurring objective in cancer research. Olax subscorpioidea is a medicinal plant used for ethnomedicinal treatment of cancer in Nigeria. In this study, we investigated the cytotoxic, anti-mitotic and cytogenetic effects of methanol extracts of the leaves and stems...
Article
Silica supported vanadium oxides (VxOy-silica 600⁰C) and polymer nanofiber [2-(2’-hydroxy-5’-ethenylphenyl)imidazole (PIMv) and styrene (ST) copolymer] supported oxidovanadium(IV) ([VIVO-p(PIMv-co-ST)]) were synthesized and employed as catalysts for the oxidation of refractory organosulfur compounds in fuels in a continuous flow system. Conversion...
Article
The combustion of nitrogen compounds in fuel remains a serious challenge due to its negative impact on public health and environments. Herein, an effective pyridine imprinted polymer (poly 4-vinyl aniline-co-DVB) was developed for the selective adsorption of pyridine, a basic nitrogen compound in fuels. The adsorption performance of the imprinted p...
Article
Full-text available
Methylthioanilines, a series of sulfur-nitrogen donor ligands substituted with OCH 3 , CH 3 , Cl, and Br, and their copper(II) complexes have been synthesized and characterized by ¹ H and ¹³ C NMR, elemental analysis, FTIR, UV-Vis and EPR spectra, molar conductance, and magnetic susceptibility measurements. The NMR spectra of the ligands revealed t...
Article
Full-text available
Organonitrogen compounds present in fuel oils are deleterious to the environment as well as refining catalysts. Herein, functional polybenzimidazole (PBI) nanofibres fabricated in the presence of N-compounds (nitrogen-containing compounds) were employed for the selective adsorption of quinoline, pyrimidine and carbazole, largely found in diesel fue...
Article
Full-text available
An octahedral zinc(II) complex of 2,2′:6′,2″-terpyridine (Tpy) and pyridine-2,6-dicarboxylate (Pydc), [Zn(II)(Tpy)(Pydc)·4H2O] was synthesized and its structure was determined by a single-crystal X-ray diffraction. The ligand pyridine-2,6-dicarboxylate coordinated to the zinc(II) ion via two pairs of carboxylate oxygens and one nitrogen atom, where...
Article
Full-text available
Molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol (PIMH) microspheres were prepared by suspension polymerization of 2-(1H-imidazol-2-yl)-4-vinylphenol in the presence of nitrogen containing compounds (N-compounds). Model nitrogen containing compounds such as quinoline, pyrimidine (basic nitrogen compounds) and carbazole (non-basic nitrogen c...
Article
Combustion of fuels containing organosulfur compounds has resulted in the emission of sulfur oxides (SOx) into the atmosphere, therefore, causing serious environmental and health hazards. Herein, slightly distorted octahedral zig-zag 1D coordination polymer of copper(II) [Cu(4-mba)2(H2O)3] was synthesized by reacting copper sulfate pentahydrate wit...
Article
Full-text available
Molecularly imprinted polymer (MIP) nanofibers were prepared by the electrospinning of poly 2-(1H-imidazol-2-yl)-4-phenol (PIMH) in the presence of various nitrogen containing compounds (N-compounds). Molecularly imprinted polymer nanofibers show selectivity for various target model nitrogen-containing compounds with adsorption capacities of 11.7 ±...
Article
Two novel isostructural compounds containing multi-component co-crystals [M(C6H4NO2)2(H2O)2](C9H6O6)2 (M = Co (1), Zn (2), C6H4NO2 = Picolinic acid, C9H6O6 = Trimesic acid) have been synthesized. The compounds were characterized by elemental analysis, FT-IR, UV–Visible and ¹H NMR spectroscopies as well as thermal and single crystal X-ray diffractio...
Article
Full-text available
The study provides a technological method for the removal of nitrogen compounds from fuels, via oxidation and extractive adsorption. The use of batch process resulted in lack of specificity of the quinoline oxidation reaction with several products produced via ring-opening while the flow micro-reactor, presented, a high degree of selectivity to qui...
Article
Full-text available
Synthesised vanadium-coordinated N,N-bis(o-hydroxybenzaldehyde)phenylene diamine catalyst, [VO(sal-HBPD)] and supported catalyst, p[VO(sal-HBPD)] were employed for the oxidation of quinoline. The use of [VO(sal-HBPD)] and p[VO(sal-HBPD)] for the oxidation of quinoline, (Quinoline-to-H2O2 ratio 1:7) showed oxidation selectivity as quinoline-N-oxide...
Chapter
Heavy and extra-heavy oils represent important energy resources and have contributed significantly to the world energy supply. Emulsification technology (specifically, formation of oil-in-water emulsion) has been considered an innovative approach to reduce the high viscosity of heavy oil and subsequently cut production and transportation costs. How...
Article
Poly(vinyl alcohol) (PVA) is often used to reduce the viscosity of bitumen. Although some studies have investigated the effects of the emulsification conditions, including aqueous phase salinity, on the performance of PVA, the tolerance to thermal degradation and compatibility with other additives, including alkaline solutions, have not been studie...
Article
Full-text available
Merrifield resin functionalised with different diquaternary ammonium groups derived from ethylenediamine (EDA), tetramethylenediamine (TMDA), hexamethylenediamine (HMDA), 1,8-diaminooctane (OMDA), 1,10-diaminodecane (DMDA) and 1,12-diaminododecane (DDMDA) were investigated for the separation of [RhCl5(H2O)]²⁻ and [IrCl6]²⁻. Selective loading of [Ir...
Article
The deleterious effects of refractory polyaromatic hydrocarbons found in fuels such as organo-sulfur compounds are such that they emit SOx to the environment when combusted, thereby reducing air quality. Herein, oxidative desulfurization (ODS) which is a complementary step to hydrodesulfurization (HDS) was carried out in an attempt to eliminate sul...
Article
The viscosity of a compressed Nigerian bitumen was measured over a temperature range of 85 °C to 150 °C. It was found that the viscosity at 85 °C and atmospheric pressure, increased from 1894 mPas to 2787 mPas at 7 MPa. At the temperature of 150 °C, the viscosity increased from 65 mPas (at atmospheric pressure) to 71 mPas at 7 MPa. Water-in-oil and...
Article
Two newly synthesized Schiff bases (L4 and L5) were derived from the condensation reaction of 2-(methylthiomethyl)anilines and 4-methoxysalicylaldehyde. Coordination complexes of these and four previously reported NOS Schiff bases, Cu(L1)2–Cu(L6)2, were synthesized via the reflux reaction of the various Schiff base ligands with CuCl2·2H2O. The comp...
Article
1,1′-Binaphthyl-2,2′-diol/quinoline (BINOL/QUN) and 1,1′-binaphthyl-2,2′-diol/isoquinoline (BINOL/ISOQUN) adducts were successfully synthesized. X-ray single crystals of BINOL/QUN and BINOL/ISOQUN were grown and analysed. The crystal packing of the molecules in both adducts confirmed that they are held in aggregates by strong hydrogen bonds (O2–H2⋯...
Article
Catalysis utilizing heterogeneous catalysts remains favoured in the chemical industry due to their ease of separation and recyclability compared to homogeneous catalysts. Electrospun nanofibers as catalyst support materials can enhance catalyst performance due to increased surface area-to-volume ratio. Recently, metal oxides and metallic nanopartic...
Chapter
Desulfurization of fuel oils is an essential process employed in petroleum refineries to reduce the sulfur concentration in fossil fuels in order to meet the mandated environmental protection limit of 10 ppm sulfur. The hydrodesulfurization (HDS) process, which is currently being employed for desulfurization, is limited in treating refractory organ...
Article
Description of emulsion stability is an essential aspect of process design and development for separation and production operations. In this investigation, bitumen-inwater emulsions were formed with bitumen contents (CB) of 50 and 70 % w/w stabilized in the aqueous solution containing Polyvinyl alcohol (PVA) and dissolved salt ranging from 0.5 – 3....
Article
Full-text available
Polyvinylbenzylchloride nanofibres were fabricated by the electrospinning technique and subsequently functionalized with a tetradentate ligand, 2,2'-(1E,1'E)-(1,2-phenylenebis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)bis(4-aminophenol). VO2+ was then incorporated into the nanofibres to produce the catalyst VO-fibres. Microanalysis, TG and FT-...
Article
Polyvinylbenzylchloride nanofibres were fabricated by the electrospinning technique and subsequently functionalized with a tetradentate ligand, 2,2'-(1E',1'E)-(1,2-phenykenebis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)bis(4-aminophenol). VO²+ was then incorporated into the nanofibres to produce the catalyst VO-fibres. Microanalysis, TG and FT...
Article
Ionic liquids containing imidazolium cations 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium nitrate, and 1-methyl-1H-imidazol-3-ium-2-carboxybenzoate were successfully synthesized and employed for the dispersion of asphaltenes in heavy oil, which is becoming a necessity during oil recovery and transportation. Molecular interactio...
Article
Full-text available
The heating of cis-[ReO2I(PPh3)2] at reflux in benzene in air led to the isolation of the rhenium(VI) complex [ReO2I2(PPh3)2] (1). The compound is centrosymmetric around the octahedrally coordinated rhenium center, and the Redouble bond; length as m-dashO bond length of 1.797(2) Å is longer than in typical trans-dioxorhenium(V) complexes. The asymm...
Article
Full-text available
Nigeria light, medium, and heavy crude oils were categorized based on the ratio of vanadium-to-nickel (V/Ni) and the ratio of phenanthrene-to-dibenzothiophene (PHEN/DBT) derivatives. V/Ni ratio of 0.47, 1.36, and 2.77 were observed for light, medium, and heavy crude oils, respectively, while the PHEN/DBT ratio was observed to be 8.35, 4.33, and 1.0...
Article
Full-text available
The adsorption and separation of platinum(IV) and palladium(II) chlorido species ([PtCl6]2- and [PdCl4]2-) on silica-based microparticles functionalized with ammonium centres based on ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetriamine (TETA) and tris-(2-aminoethyl)amine (TAEA) were investigated. The functionalized sorbent materia...
Chapter
Polymer microspheres have attracted considerable interest in both academia and industry owing to their large surface area-to-volume ratio, high porosity and mechanical properties such as strength and elastic rigidity. The applications of polymer microspheres in scientific technological advances have continued to grow, and this chapter focuses on th...
Article
Two synthesized oxovanadium(IV) polymer-supported catalysts, poly[VO(sal-AHBPD)] and poly[VO(allylSB-co-EGDMA)], were employed for the oxidation of thiophene (TH), benzothiophene (BTH), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) under a continuous flow system at 40 °C. Maximum conversion was attained at a flow rate of 1 mL...
Article
The development of poly[allylSB-co-EGDMA] beads containing a tetradentate ligand was achieved via suspension polymerization. The catalyst poly[allylSB-co-EGDMA]-VO was synthesized by reacting VIVOSO4 with poly[allylSB-co-EGDMA]. XPS and EPR were used to confirm the presence of vanadium (V4+) on the beads. The synthesized catalyst (poly[allylSB-co-E...