Synthesis and characterization of hydroxyapatite/titania nanocomposites using in situ precipitation technique

► HAp/TiO2 nanocomposites are synthesized by in situ precipitation at 70°C. ► HAp and anatase (TiO2) are the major crystalline phases of HAp/TiO2 nanocomposites. ► There is a homogenous distribution of HAp and TiO2 phases in HAp/TiO2 nanocomposites. ► The amount of TiO2 in the nanocomposites had an...

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Bibliographic Details
Published in:Superlattices and microstructures 2012-06, Vol.51 (6), p.877-885
Main Authors: Enayati-Jazi, Mahnaz, Solati-Hashjin, Mehran, Nemati, Ali, Bakhshi, Farhad
Format: Article
Language:English
Subjects:
Diffraction
Fourier transforms
Hydroxyapatite
Hydroxyapatite (HAp)
In situ precipitation
Nanocomposites
Nanomaterials
Nanostructure
Scanning electron microscopy
Titania (TiO2)
Titanium dioxide
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Summary:► HAp/TiO2 nanocomposites are synthesized by in situ precipitation at 70°C. ► HAp and anatase (TiO2) are the major crystalline phases of HAp/TiO2 nanocomposites. ► There is a homogenous distribution of HAp and TiO2 phases in HAp/TiO2 nanocomposites. ► The amount of TiO2 in the nanocomposites had an influence on the aspect ratio of crystal particles. ► By increasing the titania nanoparticles, surface area of the nanocomposites decreased. Hydroxyapatite/titania nanocomposites were successfully synthesized by in situ precipitation of precursor matters from hydroxyapatite and titania at 70°C with different hydroxyapatite/titania ratios. X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller surface, scanning and transmission electron microscopes were employed to characterize the prepared nanocomposite powders. X-ray diffraction results indicated that hydroxyapatite and anatase (TiO2) were the major crystalline phases. By increasing the amount of titania nano-particles, Fourier transform infrared spectroscopy revealed that (PO4)3− bands at 567, 1033cm−1 decreased. Brunauer–Emmett–Teller surface results also showed a reduction in surface areas of nanocomposites. Transmission electron microscope observations revealed that the aspect ratio of hydroxyapatite/TiO2 nanocrystals increased by increasing TiO2 proportion in nanocomposites. The observed nanorod crystals tended to thin, elongated and plate-like in shape.
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2012.02.013