Tailoring the morphology of hydroxyapatite particles using a simple solvothermal route

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• 作者：Maï ; ssa Dardouri^a ; ^b ; Joã ; o Paulo Borges^c ; ^{jpb@fct.unl.pt} ; Amel Dakhlaoui Omrani^b ; ^d ; ^{dakhlaoui_amel@yahoo.fr}
• 关键词：Hydroxyapatite ; Powders ; Nanoparticles ; Solvothermal approach ; Spherical morphology ; Rod-like morphologies
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：43
• 期：4
• 页码：3784-3791
• 全文大小：1901 K
• 卷排序：43

文摘

Nanometric and sub-micrometric monodispersed hydroxyapatite (HAp) particles with different morphologies (spheres and rods) were synthesized via a simple solvothermal method using Ca(NO3)2·4H2O and P2O5 as starting materials without any requirement to use organic templates. The growth, evolution and purity of the nanoparticles were investigated by controlling the synthesis conditions, including the alkalinity and the temperature of the solvothermal treatment. The increasing of the alkaline ratio results in a great change of the elaborated particles’ morphology that evolved from anisotropic forms (nanorods, sub-micrometric rod) at pH 9, short rod particles at pH 9.5 to spherical ones at higher pH (pH≥10).Powder X-Ray diffractometry (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and Nitrogen adsorption and desorption studies (BET) were used to characterize the structure and composition of the as-prepared samples.The thermal analysis of the synthesized particles conducted by differential scanning calorimetry (DSC) shows a good stability for all morphologies with a degradation temperature reaching 1300 °C.