Preparation and adsorption property of nano-rods hydroxyapatite using cationic surfactant templates

摘要

Nano-rods hydroxyapatite (HA) was synthesized by hydrothermal method using Ca(NO_3)_2?4H_2O and H_3PO_4 as precursors and cationic surfactant (CTAB) as a template. The effect of pH value and reaction temperature on the phase and morphology of HA were investigated. HA samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It was found that high pH values resulted in high purity of HA. HA morphology changed from irregular round shape to nano-rod shape with the increase of the reaction temperature from 80°C to 120°C. The prepared HA was utilized as adsorbent to remove copper ion from aqueous solution. The adsorption results showed that nano-rod HA had a rapid Cu~(2+) adsorption rate and good removal efficiency (>99%).