Influence of phosphor precursors on the morphology and purity of sol–gel-derived hydroxyapatite nanoparticles

  • Khadije Yousefi
  • Alireza Khalife
Keywords: Hydroxyapatite, Sol-gel, Precipitation, Phosphor preceusor.

Abstract

   In this study nano crystalline hydroxyapatite (HA) particles were produced by both sol-gel and precipitation methods. For this purpose calcium nitrate tetra hydrate (Ca(NO3)2·4H2O) was selected as calcium precursors  and three types of phosphorus precursors such as acid phosphoric (H3PO4) , triethyl phosphate  (C2H5O)3PO and pentad oxide phosphorus (P2O5) were chosen. The produced powders were characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results show that although hydroxyapatite can be produced by all phosphorus precursors used in the current research, the purity of HA obtained from penta oxide phosphorus and phosphoric acid is higher than that of triethyl phosphate. The SEM micrographs prove that the morphology of nano-HAP depends on the type of phosphorus precursor .The HAP prepared from acid phosphoric was spherically shaped whereas the one from triethyl phosphate  is needle like and  from penta oxide phosphorus was found to be Pyramidal in shape.

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Published
2021-06-20
Section
Articles