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Synthesis and characterisation of nanostructured silica-powellite-HAP composites

Authors :
Viorica Simon
Simion Simon
T. Radu
Adriana Vulpoi
R. Ciceo-Lucacel
O. Ponta
Source :
Journal of Materials Science. 50:577-586
Publication Year :
2014
Publisher :
Springer Science and Business Media LLC, 2014.

Abstract

Well-defined calcium molybdate (CaMoO4) and hydroxyapatite (HAP) nanocrystals were developed by thermal treatment on the surface of a SiO2–CaO–P2O5–MoO3 amorphous precursor synthesised at room-temperature by sol–gel route. The structural and morphological characterisaions were performed by several techniques: energy dispersive X-ray spectroscopy, thermal analyses (DTA/TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy, electron paramagnetic resonance. Complementary, Fourier transform infrared and Raman spectroscopies provided a clear picture regarding the short range order structure, emphasising beside the CaMoO4 phase development, the presence of HAP nanocrystals. The vibrational spectroscopic techniques proved to be valuable tools for evidencing very small HAP nanocrystallites that cannot be clearly observed by XRD and TEM analyses.

Details

ISSN :
15734803 and 00222461
Volume :
50
Database :
OpenAIRE
Journal :
Journal of Materials Science
Accession number :
edsair.doi...........0de4300742956d0f100311ce4a784b68
Full Text :
https://doi.org/10.1007/s10853-014-8615-3