Growth of Calcium Phosphate Layers on TiO2–SiO2–P2O5/CaO and TiO2–SiO2–P2O5/La2O3 Bioactive Composites

Abstract

We have studied the properties of a divinylbenzene-matrix carboxylic ion exchanger with respect to calcium and lanthanum(III) ions. Tokem-250 cation exchanger-based TiO₂–SiO₂–P₂O₅/CaO and TiO₂–SiO₂–P₂O₅/La₂O₃ composites have been prepared by a sol–gel process, and we have identified the key features of the phase formation process involved and the physicochemical properties of the synthesized materials. The results demonstrate that a calcium phosphate layer can be formed on the surface of the TiO₂–SiO₂–P₂O₅/CaO and TiO₂–SiO₂–P₂O₅/La₂O₃ materials in simulated body fluid.