Latifi, SouhaylaSaoiabi, SanaaAlanazi, Mohammed M.Boukra, OmarKrime, AnasEl Hammari, LarbiAzzaoui, KhalilHammouti, BelkheirHanbali, GhadirJodeh, ShehdehSaoiabi, AhmadSabbahi, RachidAlgarra González, ManuelAbidi, Noureddine2025-06-262025-06-262025-07-01Latifi, S., Saoiabi, S., Alanazi, M. M., Boukra, O., Krime, A., El Hammari, L., Azzaoui, K., Hammouti, B., Hanbali, G., Jodeh, S., Saoiabi, A., Sabbahi, R., Algarra, M., Abidi, N. (2025) Low-cost Titania-Hydroxyapatite (TiHAp) nanocomposites were synthesized for removal of Methylene blue under Solar and UV irradiation. Next Materials, 8, 1-17. https://doi.org/10.1016/j.nxmate.2025.100859.2949-822810.1016/j.nxmate.2025.100859https://academica-e.unavarra.es/handle/2454/54338Water pollution from industrial dyes like methylene blue (MB) poses significant environmental and health risks due to their toxicity and persistence. In this study, we synthesized a novel titania-hydroxyapatite (TiHAp) nanocomposite via a low-cost, scalable sol-gel method to address these challenges. The composite was comprehensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analysis, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Photocatalytic degradation of MB under both solar and UV irradiation was evaluated using kinetic (pseudo-first-order and pseudo-second-order) and isotherm (Langmuir and Freundlich) models, demonstrating hydroxyapatite's key role in enhancing adsorption and facilitating effective interactions with the catalyst. Under optimized conditions, the TiHAp nanocomposite achieved 96.58 % degradation of MB at an initial concentration of 120 mg/L and retained over 95 % activity after five reuse cycles. These results illustrate that the synergistic combination of TiO₂'s photocatalytic activity and HAp's adsorptive capacity produces a highly effective composite for degrading organic pollutants. The study underscores the potential of TiHAp nanocomposites as sustainable materials for wastewater treatment applications, while future work will explore their performance against a broader range of contaminants under realistic environmental conditions.application/pdfeng© 2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.Sol-gelTiHApNanocompositesPhotocatalysisDye degradationinfo:eu-repo/semantics/article2025-06-26info:eu-repo/semantics/openAccess