Electrochemical synthesis of nanosized hydroxyapatite

A homogeneous solution of Ca/EDTA/PO4-3 was electrolyzed to produce nanosized platelet-like hydroxiapatite as solid precipitates. Results show that crystallite sizes strongly depend on the initial pH value, which decrease with increasing pH, being in the nanosize range. It was found that the use of EDTA as a ligand for calcium allows experiments to be carried out at high calcium and phosphate ion concentrations, and a wide range of pH values. It was observed that under hydrothermal conditions, homogeneous Ca/EDTA/PO4-3 solutions at the aforementioned relationship produce HAp whiskers and the same solution under electrolysis produces nanometric HAp.