Sonochemical synthesis of hydroxyapatite and fluoroapatite nanosized bioceramics
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Synthesis of hydroxyapatite (HA) and fluoroapatite (FA) nanoparticles were carried out via a simple sonochemical technique. For this purpose, diammonium hydrogen phosphate [(NH4)2HPO4], hydrated calcium nitrate [Ca(NO3)2.4H2O], and ammonium fluoride [NH4F] were used as the precursors for preparation of the nanosized bioceramics. The sonochemical process was carried out at 50 W and a temperature of 30 ο C, while the pH of the reactions was kept above 10. The HA and FA nanoparticles were calcined at 600 and 700 ο C. The samples were completely crystalline at the latter calcinations temperature. Both of the nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD)\, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). These analyses demonstrated that the particle were crystalline having sizes approximately in the range of 30-60 nm. It was also found that the nanoparticles were spherical and semispherical in shape.
Abstract
Synthesis of hydroxyapatite (HA) and fluoroapatite (FA) nanoparticles were carried out via a simple sonochemical technique. For this purpose, diammonium hydrogen phosphate [(NH4)2HPO4], hydrated calcium nitrate [Ca(NO3)2.4H2O], and ammonium fluoride [NH4F] were used as the precursors for preparation of the nanosized bioceramics. The sonochemical process was carried out at 50 W and a temperature of 30 ο C, while the pH of the reactions was kept above 10. The HA and FA nanoparticles were calcined at 600 and 700 ο C. The samples were completely crystalline at the latter calcinations temperature. Both of the nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD)\, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). These analyses demonstrated that the particle were crystalline having sizes approximately in the range of 30-60 nm. It was also found that the nanoparticles were spherical and semispherical in shape.
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