Forthcoming Articles

International Journal of Nanoparticles

International Journal of Nanoparticles (IJNP)

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International Journal of Nanoparticles (One paper in press)

Regular Issues

  • Substitution of Co into the crystalline structure of ZnO and its active role in photocatalytic activation of PDS for oxytetracycline decomposition in water   Order a copy of this article
    by Nguyen Thi Cam Tien, Do Van Tien, Nguyen Thi Thuy, Vo Thi Minh Thao, Lai Duy Phuong, Phan Thanh Lam, Trinh Thi Bich Huyen, Lam Pham Thanh Hien, Tran Thi Phi Oanh, Nguyen Nhat Huy 
    Abstract: With a simple impregnation and thermal modification using commercial pure ZnO, the Co@ZnO material demonstrated an effective ability to decompose oxytetracycline (10 ppm, OTC) in water at an efficiency of 99.5% after 120 min under UV irradiation, unadjusted pH (6.5), 200 mgCo@ZnO/L, and 300 mgPDS/L. Cobalt modified the wurtzite hexagonal structure of pure ZnO by replacing the position of Zn2+ in the crystal structure, creating anion defects on the Co@ZnO composite as shown through XRD, FTIR, and UV-Vis DRS results. The main activity of superoxide in the OTC decomposition process indicates the role of Co as an electron transfer agent in this catalytic system. However, the stability of the Co@ZnO material decreased by over 50% after five reuse cycles, highlighting a potential limitation in its application. The antibacterial activity of the OTC solution during its degradation by the Co@ZnO/PDS/UV system was completely eliminated against both Escherichia coli and Staphylococcus aureus. This confirms the effective transformation of OTC into non-toxic by-products, ensuring good biosafety. These results confirm the multitasking properties of Co compared with other transition metals in PDS activation and enhance photocatalytic efficiency in water remediation.
    Keywords: persulfate; Co@ZnO; photocatalysis; oxytetracycline; activation.
    DOI: 10.1504/IJNP.2025.10073923
     

 

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