Sol-Gel Synthesis and Characterization of Cerium Substituted Calcium Hydroxyapatite

摘要

In this study, an aqueous sol-gel chemistry route based on phosphoric acid as the phosphorus precursor,udcalcium acetate monohydrate and cerium (III) nitrate hexahydrate as source of calcium and ceriumudions, respectively, have been used to prepare cerium-substituted calcium hydroxyapatite (CHAp) powders.udThe tartaric acid was used as complexing agent in the sol-gel processing. The final products were obtainedudby calcination of the dry precursor gels for 5 h at 1000 °C. The phase transformations, composition, andudstructural changes in the polycrystalline samples were studied by infrared spectroscopy (IR), X-ray powderuddiffraction analysis (XRD), scanning electron microscopy (SEM), UV-visible reflection spectroscopy andudluminescence measurements. It was demonstrated, however, that the high substitution of calcium by ceriumuddoes not proceed in the CHAp. The reflectance spectra of Ce substituted CHAp show nearly 100% reflectionudin the wavelength range of 450-800 nm. The luminescent properties of these samples were also investigated.When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34936