Abstract
In this paper, mesoporous hydroxyapatite (HAp) of controllable pore size was tailored with the template of a biodegradable mono-alkyl phosphate (MAP) via a simple route by hydrothermal treatment. A serial study of the various experimental parameters on pore size of HAp was investigated. The additive amount of MAP and hydrothermal temperature were important factors for the pore structure and pore size. Powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption (BET, BJH) were used to characterize the structure and composition of the HAp samples. Both XRD and BJH results indicated that regular mesoporous HAp nanoparticles (with a mean pore size of 3.5nm) were successfully produced. As shown in transmission electron microscopy (TEM), orderly uniform pore structure appeared in the HAp particles. Because of the special structure of the MAP and the interaction between ionized MAP and other ions in solution, the product presents uniform mesoporous structure with well-defined pore size.
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