Influence of carbonate and nickel(II) concentration on the synthesis of calcium phosphates
| Autor: | José Rodolfo Guerra-López, A.E. Bianchi, Graciela Punte, J.A. Güida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
030232 urology & nephrology
Infrared spectroscopy chemistry.chemical_element 02 engineering and technology Calcium Química Inorgánica y Nuclear Apatite URINARY CALCULI Inorganic Chemistry 03 medical and health sciences chemistry.chemical_compound Crystallinity 0302 clinical medicine BRUSHITE Materials Chemistry Brushite Physical and Theoretical Chemistry POWDER X RAY DIFFRACTION CARBONATE APATITES Ciencias Químicas 021001 nanoscience & nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials Nickel chemistry visual_art Ceramics and Composites visual_art.visual_art_medium Carbonate INFRARED SPECTROSCOPY 0210 nano-technology Powder diffraction CIENCIAS NATURALES Y EXACTAS Nuclear chemistry |
| Popis: | Two sets of Ni-substituted calcium phosphate were synthesized by precipitation method at pH = 7 and at two different concentrations of ion carbonate (CO3 2-) in solution and Ni(II) concentrations lower than 15%. The produced solids were characterized by chemical analysis, infrared spectroscopy, x-ray powder diffraction and scanning electron microscopy. The solid samples obtained at low concentration of CO3 2- (5%) and Ni(II) concentrations 5%, 10% and 15% were synthesized at 25 and 37 °C. All solids showed the presence of a stable and crystalline brushite (CaHPO4·2H2O). The samples synthesized in presence of high levels of carbonate (50%) and Ni(II) concentration 5% at 25, 37 and 100 °C vary with temperature. Those obtained at the lower temperatures (25 and 37 °C) showed coexistence of two phases: a crystalline CaCO3 and carbonate apatite with low crystallinity. At 100 °C, only carbonate apatite could be recognized. Data supported the carbonate substitution by OH- (position A) and PO4 3- (position B) in the hydroxyapatite structure. The comparison of the chemical analysis results of both systems studied (Ni,Ca) apatite and (Ni,Ca) carbonate apatite evidences a rise of Ni(II) incorporation in the apatite lattice, with simultaneous inclusion of CO3 2- and temperature increase. The obtained results suggest that brushite kidney stones development may be induced by the presence of traces of Ni(II) and simultaneous decrease of carbonate levels in the biological fluids. Fil: Guerra López, José Rodolfo. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina Fil: Guida, Jorge Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentina Fil: Bianchi, Ana Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina Fil: Punte, Graciela Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina |
| Databáze: | OpenAIRE |
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