Effect of pH on morphology, size and composition of calcium phosphate phase obtained in wet chemical
by Sahebali Manafi, Sedigheh Joughehdoust, Seyyed Hossein Badiee
International Journal of Nanomanufacturing (IJNM), Vol. 5, No. 1/2, 2010

Abstract: In the present work, the effect of pH of Ca(NO₃)₂.4H₂O and (NH₄)2HPO₄ primary solutions as the beginning materials in synthesis of a calcium phosphate phase, was examined. So, we investigated the wet chemical reactions in solution at ambient temperature by a sonochemical process aimed at hydroxyapatite synthesis. The results revealed that by reducing the pH of the systems, the probability of obtaining hydroxyapatite phase will be decreased and a noticeable reduction in size of particles will be seen. The tendency of particles is to grow along a preferable direction in pH = 4.2, but this tendency will disappear in lower and higher pHs. The results indicate that one-step synthesis of HA nanoparticles can be possible in aqueous solution using ultrasonic irradiation. Indeed, it will be favourable to obtain composition with a little difference from stoichiometric hydroxyapatite, which has very small particles in nanoscale, with considering biodegradation of bone cements and tissue engineering scaffolds.

Online publication date: Thu, 03-Dec-2009

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