Iranian Journal of Ceramic Science & Engineering
Volume 8, Issue 3 (12-2019)
2019, 8(3): 9-17 |
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Effect of chelating agent on Hydroxyapatite morphology under hydrothermal process. Iranian Journal of Ceramic Science & Engineering 2019; 8 (3) :9-17
URL: http://ijcse.ir/article-1-716-en.html
URL: http://ijcse.ir/article-1-716-en.html
Abstract: (4379 Views)
Citrate was used as chelating or morphology regulating agent in this study. In the presence of regulating agent a two-dimensional monetite phase evolved into three-dimentional hydroxyapatite microspheres with an average diameter of 4 µm. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies revealed the importance of Ca/citrate ratio in regulating the particle morphology. The results indicate that the surface morphology of microspheres can be engineered from nanosheets to nanorods by regulating agent’s concentration. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy confirmed crystallinity and purity in the synthesized powders. Brunauer-Emmett-Teller (BET) revealed an increase in the specific surface area with adding citrate. Possible mechanisms are proposed to account for the formation of different morphologies based upon thermodynamic theories.
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