Bui Thi Minh Nguyet et al. 2025. A Comparative Study on the Photocatalytic Degradation of Doxycycline Antibiotic in the Presence of ZnO/g-C3N4 and TiO2/g-C3N4 Composites. Iraqi Journal of Science. 66, 11 (Nov. 2025), 4751–4767. DOI:https://doi.org/10.24996/ijs.2025.66.11.6.