Browsing by Author "Jimoh Oladejo Tijani"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    A review on the applications of zinc tungstate (ZnWO4) photocatalyst for wastewater treatment
    (Elsevier Ltd., 2022-02-02) Abubakar Ladio Hassana; Jimoh Oladejo Tijani; Saka Ambali Abdulkareem; Abdullahi Mann; Saheed Mustapha
    The monoclinic wolframite-phase structure of ZnWO4 materials has been frequently synthesised, characterised, and applied in optical fibres, environmental decontamination, electrochemistry, photonics, catalysis, and not limited to magnetic applications. However, the problems of crystal growth conditions and mechanisms, growth, the crystal quality, stability, and the role of synthesis parameters of ZnWO4 nanoparticles remain a challenge limiting its commercial applications. This review presents recent advances of ZnWO4 as an advanced multi functional material for Industrial wastewater treatment. The review also examines the influence of the synthe sis parameters on the properties of ZnWO4 and provides insight into new perspectives on ZnWO4-based photo catalyst. Many researches have shown significant improvement in the efficiency of ZnWO4 by mixing with polymers and doping with metals, nonmetals, and other nanoparticles. The review also provides information on the mechanism of doping ZnWO4 with metals, non-metals, metalloids, metals oxides, and polymers based on different synthesis methods for bandgap reduction and extension of its photocatalytic activity to the visible region. The doped ZnWO4 photocatalyst was a more effective and environmentally friendly material for removing organic and inorganic contaminants in industrial wastewater than ordinary ZnWO4 nanocrystalline under suitable growth conditions.
  • No Thumbnail Available
    Item
    Synthesis, characterization and application of zeolite-A/graphene oxide nanocomposite for ammonia removal from poultry manure: Box-Behnken design optimization
    (Elsevier Ltd, 2026-02-02) Jimoh Oladejo Tijani; Muhammad Sani; Saheed Mustapha; Sarah Udenyi Onogwu; Abubakar Ladio Hassana; Ambali Saka Abdulkareem; Oluwatosin Kudirat Shittu; Abdulsalami Sani Kovo; Titus Chinedu Egbosiuba; Alechine Emmanuel Ameh; Muhammed Muhammed Ndamitso; Ogunmuyiwa O. Enoch; Omar H. Abd-Elkader; Hamad A. Al-Lohedan; Abdelrahman O. Ezzat
    This study developed zeolite-A/graphene oxide (GO) nanocomposite for ammonia removal from poultry manure. Zeolite-A, GO, and the zeolite-A/GO composite were synthesized and characterized using various analytical tools. Physicochemical properties of soil and poultry manure were analyzed, and ammonia reduction was assessed using column adsorption with the nanomaterials. HRSEM images showed zeolite-A as uniform cubic shapes, GO with a layered structure, and the zeolite-A/GO composite as stacked cubic-spherical particles. HRTEM images indicated strong interactions with smaller zeolite-A particles within GO sheets. FTIR analysis showed characteristic peaks for both zeolite-A and GO, indicating retention of both materials’ features. N2 adsorption-desorption analysis revealed surface areas of 15.89 m²/g for zeolite-A, 19.35 m²/g for GO, and 69.30 m²/g for the composite. The response surface methodology (RSM) results indicated that zeolite-A/graphene oxide nanocomposites significantly removed 95% ammonia, with adsorbent dosage being the most influential factor, followed by stirring time, while pH had a non-significant effect. The removal efficiencies of ammonia using the adsorbents were temperature-dependent under the influence of optimum parameters from the RSM results.