OYEWOLE SEUN TOYIB

Chemistry

At the Chemistry department office

Appointment on Visitation important

Topic: Phocatalytic Degradation Studies Of Methylene Blue Dye By Green Synthesized Nickel Oxide Nanoparticles

Description: The process of degrading dyes is a challenging task due to their persistent and stable nature. Consequently, developing materials with desirable properties for dye degradation is an important area of research. The study will focus on the synthesis of nickel oxide nanoparticles NiONPs using green synthesis and non-toxic Psidium guajava extracts. The characterization of the obtained Nickel oxide nanoparticles will be conducted using various techniques, including scanning electron microscopy SEM , X-ray diffraction XRD , Fourier transform infrared FT-IR , Brunauer-Emmett-Teller BET , transmission electron microscopy TEM , and UV-visible spectroscopy. X-ray diffraction analysis will revealed that the synthesized nickel oxide nanoparticles had crystalline structures or amorphous with high purity. The surface texture of the nanoparticles, will be observed by SEM. FTIR spectroscopy will be used to identify the chemical molecules that coated the NiO NPs. The average particle size will be obtained from TEM analysis. BET will revealed the surface area, por volume and pore diameter of the synthesized nanoparticles. The photocatalytic activity of NiO nanoparticles for the degradation of methylene blue dye will be investigated investigated under UV light irradiation, which will reveal a maximum removal efficiency after few minutes. The results shall demonstrate the strong potential of the synthesized NiO nanoparticles for application as photocatalysts in the rapid degradation of industrial dyes in water treatment.Keywords: Green synthesis, methylene blue dye, Photocatalyst, Degradation, psidium guajava, Water treatment.

#	Certificate	School	Year
1.	Ph.D (Physical Chemistry)	CHEMISTRY, LAGOS STATE UNIVERSITY	NaN

The Adsorptive Removal Of Ibuprofen From Aqueous Solutions Using Chemically Modified Onion Peel: Kinetics, Isotherms And Thermodynamic Studies

The presence of pharmaceutical pollutants, such as ibuprofen, in water sources presents considerable environmental and health hazards. To understand the adsorption mechanisms of chemically modified Allium Cepa onion peel as a cost-effective adsorbent for removing ibuprofen IBP from simulated wastewater, the kinetics, isotherms, and thermodynamics of adsorption were studied. The onion peels were chemically treated to improve their adsorption properties and assessed through batch adsorption experiments. Characterization of the onion peels was performed using Scanning Electron Microscopy SEM and X-ray diffraction XRD . Fourier Transform Infrared Spectroscopy FTIR identified functional groups that enhance IBP adsorption: O-H 32889 3280 cm , C-H 2992 2926 cm , C = C 1595 16170 cm , and C-O 1059 999 cm groups. XRD analysis showed that the onion peel was amorphous, while SEM revealed numerous pores on the chemically oxidized onion peels, making them effective for capturing IBP molecules. The study explored operational parameters such as contact time, pH, temperature, initial IBP concentration, and adsorbent dose. Initial and equilibrium concentrations were determined using UV-visible light. The adsorption of IBP was found to be pH-dependent, with an optimal pH of 5. Langmuir, Temkin, and Freundlich isotherm models were used to simulate the data, with the Temkin isotherm providing the best fit R2=0.991 . The modified adsorbent demonstrated a maximum adsorption capacity of 347.00 mg/g at 37 C. Kinetic processes were analyzed using pseudo-first-order and pseudo-second-order models, with the latter offering the best fit. Thermodynamic parameters suggested that the process was spontaneous and endothermic. This study demonstrated that onion peels are an effective precursor for bioremediation preparation, providing an efficient alternative for removing ibuprofen from aqueous solutions.Keywords: Ibuprofen, Allium Cepa Pericarp , Equilibrium Isotherms, and Thermodynamics

OYEWOLE TOYIB is a Assistant Lecturer at the Department of Chemistry

OYEWOLE has a Ph.D in Physical Chemistry from CHEMISTRY, LAGOS STATE UNIVERSITY