Surface properties of porous hydroxyapatite derived from natural phosphate

Porous hydroxyapatite c-HAp was prepared using a one-step process involving dissolution/precipitation of natural phosphate. This process provides a simple and flexible route to prepare porous apatite. The structure of c-HAp was investigated by combining XRD, solid-state NMR and N2 adsorption measurements. The nanoporous c-HAp with the largest BET surface area of 150 m2 g−1, exhibited much mesopores and the small micropores simultaneously. In order to investigate the surface properties of this novel material, the adsorption of fluoride, lead was evaluated.