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<p>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&#xa0;°C for 20&#xa0;min, and a mechanosynthesis approach using bovine bone waste. A Ca/P precursor system was prepared, in which CaCO₃ served as the calcium source and ethylenediaminetetraacetic acid (EDTA) as a chelating agent. Na₅P₃O₁₀ 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<sub>3</sub><sup>2−</sup>, PO<sub>4</sub><sup>3−</sup> and OH<sup>−</sup> groups. The BET analysis confirmed the specific surface areas for the HA_ht and HA_h, further indicating their structural similarity.</p> Graphical abstract <p></p>

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Fast one-pot hydrothermal synthesis of hydroxyapatite

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • J. Zorrilla-Siller,
  • Boris I. Kharissov,
  • Lucy T. González,
  • Eduardo M. Sánchez

摘要

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 CaCO₃ served as the calcium source and ethylenediaminetetraacetic acid (EDTA) as a chelating agent. Na₅P₃O₁₀ 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 CO32−, PO43− and OH− groups. The BET analysis confirmed the specific surface areas for the HA_ht and HA_h, further indicating their structural similarity.

Graphical abstract