Preparation and characterization of nanocrystalline hydroxyapatite from egg shell and K2HPO4 solution

Published Date
15 April 2013, Vol.97:148–150, doi:10.1016/j.matlet.2013.01.082

Author 

• Biswadeep Chaudhuri ^a
 
• Bholanath Mondal ^b
 
• D.K. Modak ^c
 
• K. Pramanik ^a
 
• B.K. Chaudhuri ^c,,

• aDepartment of Biotechnology and Medical Engineering, NIT Rourkela 769008, India
• bDepartment of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700032, India
• cDepartments of Solid State Physics, Indian Association for the Cultivation of Science, Kolkata 700032, India

Received 6 August 2012. Accepted 19 January 2013. Available online 25 January 2013.

Abstract

Ca₁₀(PO₄)₆(OH)₂ (or HAP) was prepared from egg shell and dipotassium phosphate (K₂HPO₄). Appropriate amount of egg shells derived CaO was soaked in K₂HPO₄solution (with Ca/P∼1.67) at 37 °C for different soaking times (ST) to obtain nanocrystalline HAP which was characterized by XRD, SEM, HRTEM and FTIR studies. Both grain size and pH showed very little decreasing tendency with increasing ST. The lattice strain estimated from the XRD data also showed similar behavior with increasing ST. The present process of low temperature HAP synthesis is simple, low cost and environment friendly for the large scale production of pure HAP.

Highlights

► Developed a simple and low cost method for the predation of naocrystalline hydroxyapatite (HAP). ► CaO obtained from egg shell when soaked in appropriate K₂HPO₄ produced HAP nanoparticles. ► Obtained HAP powder is suitable for making composite scaffold with biodegradable polymers.

Keywords

Hydroxyapatite

Nanoparticle

Lattice-strain

Egg shells

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