Impact of TITANIUM MONOXIDE (cas 12137-20-1) stoichiometry and heat treatment on the properties of TiOy/HAp nanocomposite

Add time:07/30/2019    Source:sciencedirect.com

Nanocomposites with 10 or 20 wt% additives of nonstoichiometric TITANIUM MONOXIDE (cas 12137-20-1) TiOy (y = 0.92; 1.23) to hydroxyapatite (HAp) were prepared. The nanocomposites were studied by using of X-ray diffraction analysis (XRD), high-resolution transmission electron microscopy (HRTEM), infrared (IR) and Raman spectroscopy methods. It was found that after annealing at 400 oС the titanium valence changes. The surface groups originating from HPO42− and OH− coordinating to Ti4+ and terminal carbonyls are formed. Partial cationic heterovalent substitution of Ti3+ and Ti4+ for Са2+ takes place. It was shown that the phase composition of HAp/TiOy nanocomposites depended on the stoichiometry of additives and their weight content.

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