College of Physical Sciences
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Item A SECURITY MANAGEMENT SYSTEM FOR CRITICAL INFORMATION INFRASTRUCTURE(2023-08-20) Adejimi, Alaba OlusesiItem HYDROGEN EVOLUTION VIA PROTON REDUCTIN CATALYZED BY 1,10- PHENAATHROLINE ADDUCTS OF EARTH - ABUNDANT DITHIOCARBAMATE(2023-05-02) SHOTONWA, Ibukun OluwaseunItem AN OPTIMIZED PERSONALITY RECOGNITION MODEL FOR SOCIAL MEDIA USERS(2025-06-15) ADEBIYI, BUKOLA TAIBATItem DETERMINATION OF LEAD ION IN BODY CREAM SAMPLES USING SILVER NANOPARTICLES AND DITTHIZONE AS A SENSOR(2025-05-13) ADEDOKUN, ADERINSOLO OMOTAYOItem A COMPUTATIONAL STUDY OF HEAT AND MASS TRANSFER IN POWER LAW FLUID PAST AN ACCELERATED RIGA PLATE(2025-10-16) ADEYEMI, AMOO AZEEZItem IMPACT OF VISCOUS DISSIPATION IN A RADIATED AGNETOHYDRODYNAMIC WALTERS'B FLUID THROUGH A POROUS MEDIUM WITH CHEMICAL REACTION AND THERMAL DIFFUSION(2025-10-11) KOLA WOLE-IDOWU, OLUWATIMILEHINItem MIXED CONVECTION FLOW OF JEFFREY FLUID PAST VERTICAL AND INCLINED LINEAR AND NONLINEAR STRETCHABLE PLATES(2025-10-30) IYOKO, MICHAEL OJAGABOItem JOINT MODELLING OF LONGITUDINAL AND CUREPROPORTION WITH SPATIAL VARIATION USING LATENT GAUSSIAN MODEL(2025-10-21) EKONG,ANIEFIOK HENRYItem A COMPUTATIONAL STUDY OF HEAT AND MASS TRANSFER IN POWER LAW FLUID PAST AN ACCELERATED RIGA PLAT(2025-10-20) ADEYEM1.AMOO AZEEZItem A BAYESIAN DESIGN-BASED GENERALIZED LINEAR MIXED MODEL FOR TWO-STAGE SURVEY DATA(2025-11-25) OLAKIIGBE, ABIODUNKANMIItem SYNTHESIS AND DEVELOPMENT OF HUMIDITY SENSOR DASED ON NANOHYBRIDIZED – METAL OXIDE AND – BIOPOLYMERIC MATERIALS(2025-09-25) OLANIYAN, JULIANAH OLAYINKAItem SYNTHESIS AND CHARACTERIZATION OF MAGNETIC4d-TRANSITION METALION-IMPRINTEDKAOL IN CHITOSANHYBRID FOR SELECTIYEMITIGATION OF METALTOXICITY INPLANT(2025-09-17) ADEBAYO, ANIKE OMOBOLAABSTRACT The contamination of soil by toxic metals is a critical environmental challenge which poses a significant risk to the ecosystem and human health. Several soil remediation methods have been explored but have been limited by poor selectivity, high production cost and reusability. This work explored the adsorption capability of chitosan and kaolin in developing a sustainable, selective, and reusable solution for cadmium detoxification in soil using abio-based hybrid material. It successfully synthesized and characterized palladium(pd), Silver(Ag) and cadmium(Cd)ion-imprinted polymers(IIPs) and non-imprinted(NIP) from Magnetic kaolin - chitosan nanocomposite(MKCNC)and studied their adsorption potentials. IIPs and NIP were characterized using Ultra-violet/Visible spectroscopy (UV-vis), Fourier Transform Infra-red spectroscopy (FTIR), Scanning Electron Microscopy coupled with Energy Dispersive X-ray Analysis (SEM-EDX), Thermogravimetric Analysis (TGA)and Inductively Coupled Plasma-Optical Emission Spectroscopy(ICP-OES). The adsorption potential of the synthesized IIPs and NIP were investigated on maize plantings. Maize seeds were planted in soil spiked and treated with water only (pot1),25mgCdIP(pot2),25mgCdIP20mgCdC12(Ot3),50mg CdIP+20mgCdCl2Ot4)and25mgNIP+20mgCdC12Ot5). The UV-visa sorption bands of the leached and unleashed IIPs showed sharp band at around 224-240 rim indicating transition. The FTI Result to the nanocomposites how ethic (C—N)str (imine/azomethine) functional groupat1615cm1,however upon polymerization, the three IIPss have higher vibrational frequency (blue shift) at the region of u(C=N)strat1628cm‘'(PdlP),1638 cm‘'(AgIP) and1636 cm”'(CdlP). The SEMEOXs hawed crystalline morphology of large irregular particles. The surfaces of the IIPs appeared to be covered with powdered materials. TGA of the NIP and IIPs showed 4stages of weight loss. There was no obvious difference between the absorbance bands of leached and unleachedIIPs.Thisisanindicationthatthepolymermatrixremainsunalteredeven afterleaching.ThepowderysurfacesoftheSEM-EDXimagescouldbeattributedtothe imprinting of ions on the surface of the IIPs. The thermal studies showed that CdIP demonstratedthegreatestthermalstabilityamongstthethreeIIPs.Optimalreactionconditionof 89% adsorption was observed at pH 6.5 atareactiontimeof90 minutes. The NIP and CdIP showed excellent adsorption capacity by successfully mitigating Cd ions from being translocated into the maizeplantbody.Thenon-imprintedandion-imprintedpolymershavethepotentialof contributing to the advancement of sustainable soil remediation technologies and support agricultural productivity and environmental health.Item DETERMINATION OF LEAD ION IN BODY CREAM SAMPLES USING SILVER NANOPARTICLES AND DITHIZONE AS A SENSOR(2025-05-20) ADEDOKUN, ADERINSOLA OMOTAYOItem THE USE OF ARTIFICIAL INTELLIGENCE IN GEOPHYSICAL SOFTWARE DEVELOPMENT FOR MAPPING SUBSURFACE FEATURES AND ENHANCING SEISMIC IMAGES IN 3D(2025-04-20) ADEDEJI, JELILI KUNLEItem ENHANCING IRIS AUTHENTICATION: A GRADUAL FEATURE SELECTION APPROACH AUGMENTED WITH SOFT VOTE ENSEMBLI NG(2023-06-29) OMOJOLA, ABIODUN FOLURERAItem SYNTHESIS AND CHARACTERIZATION OF CRAYFISH-BASED NPrGO-HYDROXYAPATITE AND BIOSORBENT FOR PATHOGENS AND MERCURY (II) REMOVALFROM WASTEWATER(2025-09-17) OTUNBA, Phadlullahi AdedejiItem SYNTHESIS AND CHARACTERIZATION OF MAGNETIC4d-TRANSITION METALION-IMPRINTEDKAOL IN CHITOSANHYBRID FOR SELECTIYEMITIGATION OF METALTOXICITY INPLANT(2025-09-14) ADEBAYO, ANIKE OMOBOLAABSTRACT The contamination of soil by toxic metals is a critical environmental challenge which poses a significant risk to the ecosystem and human health. Several soil remediation methodshavebeenexploredbuthavebeenlimitedbypoorselectivity,highproduction cost and reusability. This work explored the adsorption capability of chitosanandkaolin indevelopingasustainable,selective,andreusablesolutionforcadmiumdetoxification insoilusingabio-based hybrid material.Itsuccessfully synthesizedandcharacterized palladium(pd),Silver(Ag)andcadmium(Cd)ion-imprinted polymers(IIPs)andnon-imprinted(NIP)fromMagnetickaolin-chitosannanocomposite(MKCNC)andstudied theiradsorption potentials. IIPsandNIPwerecharacterized usingUltra-violet/Visible spectroscopy (UV-vis), Fourier Transform Infra-red spectroscopy (FTIR), Scanning Electron Microscopy coupled with Energy Dispersive X-ray Analysis (SEM-EDX), ThermogravimetricAnalysis (TGA)andInductivelyCoupled Plasma-OpticalEmission Spectroscopy(ICP-OES).TheadsorptionpotentialofthesynthesizedIIPsandNIPwere investigated on maize plantings. Maize seeds were planted in soil spiked and treated withwateronly(pot1),25mgCdIP(pot2),25mgCdIP20mgCdC12(Ot3),50mg CdIP+20mgCdCl2Ot4)and25mgNIP+20mgCdC12Ot5).TheUV-visabsorption bands of the leached and unbleached IIPs showed sharp band at around 224-240 rim indicatingz—+z*transition.TheFTIRresultofthenanocompositeshowedthec(C—N)str (imine/azomethine)functional groupat1615cm1,however upon polymerization,the three IIPsshoweda highervibrational frequency (blue shift) at the region of u(C=N)strat1628cm‘'(PdlP),1638 cm‘'(AgIP) and1636 cm”'(CdlP). The SEM-EOXshowedcrystallinemorphologyoflargeirregularparticles.ThesurfacesoftheIIPs appearedto be coveredwith powderedmaterials.TGAoftheNIPand IIPsshowed 4stages of weight loss. There was no obvious difference between the absorbance bands of leached and unbleached IIPs. This is an indication that the polymermatrixremainsun altered even after leaching. The powdery surfaces of the SEM-EDX images could be at tribute to the imprinting of ions on the surface of the IIPs. The thermal studies showed that CdIP demonstratedthegreatestthermalstabilityamongstthethreeIIPs.Optimalreactionconditionof 89% adsorptionwas observedat pH 6.5 atareactiontimeof90 minutes.The NIP andCdIP showed excellent adsorption capacity by successfullymitigating Cd ions from being translocatedinto the maizeplantbody.Thenon-imprintedandion-imprintedpolymershavethepotentialof contributing to the advancement of sustainable soil remediation technologies and supportagricultural productivity andenvironmentalhealth.Item PHOTOCATALYTIC DEGRADATION OF SELECTED ENVIRONMENTAL ORGANIC POLLUTANTS USING A GREEN SYNTHESIZED Mn3O4ZnO/Co34 NANOCOMPOSITE(2025-09-07) OLOMIEJA, AYODELEOJOABSTRACT Thepresenceoforganicpollutantsinwastewaterposessignificanthealthrisksto humans andaquaticecosystems. Photocatalyticdegradation hasemerged asoneofthe highlyeffectivemethodsforremovingthesepollutants.Thisstudyinvestigatedthe photocatalyticdegradationofselectedEnvironmentalOrganic Pollutants (EOPs) using agreen-synthesizedMn3O4tZnO/Co3O4(MZC)nanocomposite.TheMZCwas preparedthroughenvironmentallyfriendlymethodsthatutilizednon-toxicreagents andsustainableprocesses.Thiswasachievedbyusingmanganese(II)acetate tetrahydrate,zincnitratehexahydrate,cobalt(II)chloridehexahydratealongwith Moringaleafextractviaa simplesingle-stepcombustionmethod.Thematerialwas characterizedbyFourierTransformInfraredspectroscopy(FTIR),Ultraviolet-Visible spectrometry(UV-Vis), Scanning Electron Microscopy(SEM), TransmissionElectron Microscopy(TEM) andX-Ray Diffraction(XRD).Batch degradationexperimentsof MZC on Ciprofloxacin hydrochloride (CIP), Amoxicillin trihydrate (AMX), PolyethyleneGlycol(PEG)andDiethylphthalate(DEP)wereconductedunder varying conditions:pH (3 - 9), timeintervals(30 - 180 minutes),temperatures(25- 45°Cat 10°Cinterval) and catalystdoses (0.05- 0.15 g). The optimizedconditions were then appliedto raw samplesproducedwastewater(RPW)from oil mining.The degraded wereanalyzedusingUV-VisandGasChromatography-Mass Spectrometer(GC-MS).TheFTIRanalysisofthepreparedMZCnanocomposite acharacteristicstretchingvibrationsat3257,2325,1650,and1095cm', C-O-Cgroups,respectively.TheXRDdiffractogram of MZC showed sharp peaks at 28 of 12, 21 and 26°, which ascertained the crystallinity ofMZC.TheTEMporositydimension rangedfrom 20-50rim,showing the mesoporous nature of the material while the SEM micrograph revealed surface morphology with significant porosity. The highest degradation obtained for CIP, AMX,PEG,andDEPwere99.98%,25°C;53.5%atpH9,45°C;69.20%atpH9, 45°Cand76.9%atpH9,45°Crespectively.TheGC-MSresultsrevealedthatmajority ofthe compounds weredegraded. The CIP degradation showed theformation ofnew compounds: 2,3,7-trimethyldecane and 2-bromotetradecane after 150 minutes; while that of PEG showed the formation of8-methylheptadecaneand heptaethylene glycol after 60 minutes, and DEP degraded completely. There were also formation of new compounds: 24-Norursa-3,12-dien-11-oneand O1ean-12-en-3-ol from the RPW. The study showed that the synthesized Mn3O4tZnO/Co3O4»anocomposite effectively degraded the selected organic pollutants and hence can be used as a facile and cost effective material for waste-water purification.