abstract
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The main result of this article is the comparison of two green chemistry synthesis methods and the resulting structural properties of hydroxyapatite (HA): a fast one-pot hydrothermal synthesis at 160 °C for 20 min, and a mechanosynthesis approach using bovine bone waste. A Ca/P precursor system was prepared, in which CaCO¿ served as the calcium source and ethylenediaminetetraacetic acid (EDTA) as a chelating agent. Na¿P¿O¿¿ acted as the phosphorus source, ensuring a Ca/P molar ratio of 1.67:1. The samples were analyzed by X-ray diffraction (XRD) and compared with HA obtained from bovine bone by mechanosynthesis (HA_h), confirming the expected HA crystallographic phase. Fourier-transform infrared spectroscopy (FTIR) revealed vibrational modes similar to those of the HA_h sample, with frequencies like CO
3 2¿, PO4 3¿ and OH¿ groups. The BET analysis confirmed the specific surface areas for the HA_ht and HA_h, further indicating their structural similarity. © The Author(s), under exclusive licence to The Materials Research Society 2025.