Browsing by Author "Iman Kir"

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    Enhanced of Photocatalytic Activity of Biosynthesized ZnO/CuO/Cu2MgO3 Nanoparticles for the Degradation of Bromocresol Green
    (University of Eloued, 2023-12-11) Tabet Amina; Souhaila Meneceur; Salah Eddine Laouini; Salmi Chaima; Hamdi Ali Mohammed; Iman Kir
    The current investigation is centered on the sustainable synthesis, physical characterization, and performance evaluation of various metal oxide nanoparticles (NPs) produced utilizing an extract derived from Common Rue. Following the synthesis of metal oxide NPs, including ZnO/CuO/Cu2MgO3, a comprehensive characterization was carried out employing various techniques such as FTIR, UV, XRD, and SEM to scrutinize their chemical and physical attributes. Photocatalytic activity was evaluated by assessing their effectiveness in degrading bromocresol green, an anionic dye. The characterization results substantiated the successful fabrication of ZnO/CuO/Cu2MgO3 nanoparticles. X-ray diffraction analysis verified the presence of hexagonal ZnO and monoclinic CuO nanoparticles within the nanocomposite, along with cubic Cu2MgO3. Scanning electron microscopy illustrated well-defined, spherical nanocomposite particles with an average size of approximately 70 nm. Fourier transform infrared spectroscopy demonstrated the coexistence of both organic and inorganic components within the nanocomposite. These nanoparticles exhibited respective band gap energies of 1.5 eV. The study on photocatalytic activity revealed a substantial removal of the organic dye by the synthesized nanoparticles, achieving a degradation coefficient of 99.66% at 75 minutes. These findings underscore the efficacy of ZnO, MgO, and CuO nanoparticles, suggesting their potential as a cost-effective and environmentally safe alternative for water treatmen
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    Green synthesis of copper nanoparticles and Their Modification with Polyethylene Glycol to enhance photocatalytic activities
    (University of Eloued, 2023-12-11) Iman Kir; Laouini Salah Eddine; Meneceur Souhaila
    Synthesis using plant extracts is a simple, environmentally friendly and inexpensive method to prepare nanoparticles effective in photocatalytic applications. In this study, aqueous extract of lemon peel was used to synthesize copper oxide nanoparticles (NPs) and then the obtained copper oxide nanoparticles were modified with polyethylene glycol (PEG). The optical properties and photocatalytic activities of the synthesized nanoparticles were studied. CuO NPs and CuO/PEG NPs showed a ball-like morphology with average sizes of 34 nm and 45 nm and optical band gap energies of 1.2 eV and 1.5 eV, respectively. In photocatalytic activity tests, CuO/PEG NPs showed higher activity compared to CuO NPs alone. They achieved degradation rates of 99.7% for 4-bromophenol dye (BP) and 99.5% for toluidine blue dye (TP) after 90 min, while CuO NPs achieved slightly lower rates. CuO NPs and CuO/PEG NPs showed significant photodegradation activity against amoxicillin (an antibiotic), with degradation rates of 91% and 98%, respectively, after 120 min. The reaction kinetics of CuO/PEG NPs and CuO NPs followed a pseudo-order model, with CuO/PEG NPs showing a higher rate constant than CuO NPs. Overall, modification of CuO NPs with PEG showed excellent photocatalytic properties for environmental remediation, indicating their potential use in wastewater treatment and therapeutic applications
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    Green synthesis of copper nanoparticles and Their Modification with Polyethylene Glycol to enhance photocatalytic activities
    (University of Eloued, 2023-12-11) Iman Kir; Laouini Salah Eddine; Meneceur Souhaila
    Synthesis using plant extracts is a simple, environmentally friendly and inexpensive method to prepare nanoparticles effective in photocatalytic applications. In this study, aqueous extract of lemon peel was used to synthesize copper oxide nanoparticles (NPs) and then the obtained copper oxide nanoparticles were modified with polyethylene glycol (PEG). The optical properties and photocatalytic activities of the synthesized nanoparticles were studied. CuO NPs and CuO/PEG NPs showed a ball-like morphology with average sizes of 34 nm and 45 nm and optical band gap energies of 1.2 eV and 1.5 eV, respectively. In photocatalytic activity tests, CuO/PEG NPs showed higher activity compared to CuO NPs alone. They achieved degradation rates of 99.7% for 4-bromophenol dye (BP) and 99.5% for toluidine blue dye (TP) after 90 min, while CuO NPs achieved slightly lower rates. CuO NPs and CuO/PEG NPs showed significant photodegradation activity against amoxicillin (an antibiotic), with degradation rates of 91% and 98%, respectively, after 120 min. The reaction kinetics of CuO/PEG NPs and CuO NPs followed a pseudo-order model, with CuO/PEG NPs showing a higher rate constant than CuO NPs. Overall, modification of CuO NPs with PEG showed excellent photocatalytic properties for environmental remediation, indicating their potential use in wastewater treatment and therapeutic applications