Browsing by Author "Oladele, Ebenezer O."

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    ITACONIC ACID BASED COORDINATION POLYMER: MECHANOCHEMICAL SYNTHESIS, CHARACTERIZATION AND VAPOCHROMIC STUDY
    (Nigerian Research Journal of Chemical Sciences, 2020-05-30) Olawale, Margaret D.; Obaleye, Joshua A.; Oladele, Ebenezer O.
    Itaconic acid based coordination polymer (CP) was synthesized through a mechanochemical reaction between itaconic acid ligand and copper (II) salt. The [Cu(Itac)2] CP was characterized by elemental analysis, Infrared spectroscopy, UV-Visible spectrophotometry and powder x-ray diffractometric analysis which confirmed its synthesis. In the application of [Cu(Itac)2], vapochromic behavior was carried out with different solvents vapour. Result revealed methanol having the highest sorption values of 1.44 moles. Also, the adsorption of the solvents vapour on [Cu(Itac)2] increased in the order of methanol > DMF > ethanol > acetone > isopropanol > benzene > toluene. The polarity of the solvents, solvent sizes and the unique affinity of [Cu(Itac)2] CP to some solvents may account for trend observed in rate of solvents uptake. These results indicate that [Cu(Itac)2] could be used to remove unwanted solvent vapour from contaminated air due to their reasonably large surface area.
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    Solvothermal synthesis and characterization of novel [Ni(II)(Tpy)(Pydc)]·2H2O metal–organic framework as an adsorbent for the uptake of caffeine drug from aqueous solution†
    (Royal Society of Chemistry, 2020-10-09) Olawale, Margaret D.; Obaleye, Joshua O.; Oladele, Ebenezer O.
    The discharge of pharmaceuticals and personal care products effluent after industrial processes with little or without treatment is increasing at an alarming rate. Health risks associated with the discharge of pharmaceuticals and personal care products effluent into the environment cannot be over emphasized. Therefore, there is an urgent need to develop metal–organic framework (MOF) material that can be used to adsorb pharmaceuticals and personal care products before the discharge of waste water into the environment. [Ni(II)(Tpy)(Pydc)]·2H2O MOF was synthesized from the reaction of nickel nitrate, terpyridine (Tpy) and pyridine dicarboxylate (Pydc) via solvothermal method of synthesis. The synthesized MOF was characterized with melting point determination, elemental analysis, hot stage microscope, thermogravimetric analysis, SEM and X-ray crystallography analysis. All results clearly showed the coordination of the nickel(II) ion to the two ligands. In application, [Ni(II)(Tpy)(Pydc)]·2H2O MOF was used for the adsorption of caffeine. The result clearly showed that 98.4 mg of caffeine was adsorbed by 1 g of [Ni(II)(Tpy)(Pydc)]·2H2O MOF at 40 °C, pH of 4 for 1 hour via multiple binding site (Freundlich isotherm). Characterization of the aqueous caffeine solution after adsorption showed a negligible amount of nickel metal when compared with the WHO nickel intake recommendation. [Ni(II)(Tpy)(Pydc)]·2H2O MOF is a potential adsorbent that could be used for the removal of caffeine from aqueous solutions..