Calcium phosphate-based materials of natural origin showing photocatalytic activity

• Published in: Journal of Materials Chemistry A
• Main Authors: Piccirillo, Clara, Dunnill, Charles W., Pullar, Robert C., Tobaldi, David M., Labrincha, Joao A., Parkin, Ivan P., Pintado, Manuela M., Castro, Paula M. L.
• Format: Article in Journal/Newspaper
• Language: English
• Published: ROYAL SOC CHEMISTRY 2013
• Subjects: CHEMICAL-VAPOR-DEPOSITION; THIN-FILMS; HYDROXYAPATITE COATINGS; TRICALCIUM PHOSPHATE; UV-IRRADIATION; ANATASE TIO2; PHASE-CHANGE; TITANIA; SURFACE; DECOMPOSITION; atlantic cod
• Online Access: http://hdl.handle.net/10773/19315; https://doi.org/10.1039/c3ta10673j

Calcium phosphate based materials of natural origin with photocatalytic properties were produced. Bones of Atlantic cod fish were treated in appropriate solutions (either Ca- or Ti-containing salts) and successively annealed. Results showed multiphasic materials (hydroxyapatite, beta-tricalcium phosphate and anatase titania) with excellent photocatalytic performance under both UV and visible light, with an anatase concentration of only about 2 mol%. Results with such a low amount of anatase have never been reported before for a calcium phosphate-based material; this is attributed to the presence of anatase being mainly on the surface. Single-phase hydroxyapatite (Ca-10(PO4)(6)(OH)(2) or HAp) also showed some photocatalytic properties and antibacterial activity.