水热合成羟基磷灰石纳米晶：含海藻酸钠溶液的酸碱性效应

Hydroxyapatite (HA) separate nanoparticles could be widely used in various fields including biomedical purposes, and the synthesis of these nanoparticles has received continuous attention. Our previous studies indicated that the initial pH value of alginate-containing soultions directly influenced the structure and morphology of hydrothermally synthesized HA. In this study, we focused on the investigation into the hydrothermal reaction of acidic and alkali alginate-containing solution, and hydrothermally synthesized products were characterized with a scanning electron microsocope, X-ray diffractometer and Fourier-transform infrared spectroscope. According to these analytical data, under the low alginate concentrations the products were predominantly plate-like HA crystals along with some flower-like crystals, and the effect of different acidic pH values of solutions on hydrothermal products changed the length of plate-like HA. In contrast, the hydrothermal reaction of alkali 0.3% alginate-containing solutions yielded HA nano-rods. Different from the aggregated state of the conventional hydrothermal products, these nanorods were separate nanoparticles, about 20 nm in width and 20-100nm in length.