Calcium and phosphate adsorption as initial steps of apatite nucleation on sol-gel-prepared titania surface.
Titania powders have been prepared by the sol-gel route from Ti (IV) ethoxide under acidic conditions. Adsorption experiments of calcium and phosphate ions on gel-derived titania suspensions were performed to suggest a likely initial step of apatite growth on its surface. Experiments were performed as a function of time and pH at 37 degrees C with and without NaCl present in the suspensions. Also, zeta (zeta) potential experiments were performed to determine the kind of calcium adsorption. Results suggest that, apparently, calcium and phosphate adsorption can act as two different initial steps for apatite growth.
Coreño
Juan
J
Centro de Investigaciones en Materiales y Metalurgia, Universidad Autónoma del Estado de Hidalgo, Ciudad Universitaria, Carretera Pachuca-Tulancingo km 4.5 Pachuca, Hgo, México. jcoreno@uaeh.reduaeh.mx
Martínez
Antonia
A
Coreño
Oscar
O
Bolarín
Ana
A
Sánchez
Félix
F
D000327:Adsorption; D001031:Apatites / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008854:Microscopy, Electron; D010710:Phosphates / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
D001031:Apatites; D005782:Gels; D010710:Phosphates; D014025:Titanium; D002118:Calcium