TY - JOUR
T1 - Tailoring the morphology of hydroxyapatite particles using a simple solvothermal route
AU - Dardouri, Maïssa
AU - Borges, João Paulo
AU - Omrani, Amel Dakhlaoui
N1 - sem pdf conforme despacho.
Portuguese Foundation for Science and Technology - UID/CTM/50025/2013
PY - 2017/3/1
Y1 - 2017/3/1
N2 - 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.
AB - 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.
KW - Hydroxyapatite
KW - Nanoparticles
KW - Powders
KW - Rod-like morphologies
KW - Solvothermal approach
KW - Spherical morphology
UR - http://www.scopus.com/inward/record.url?scp=85007047161&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2016.12.022
DO - 10.1016/j.ceramint.2016.12.022
M3 - Article
AN - SCOPUS:85007047161
SN - 0272-8842
VL - 43
SP - 3784
EP - 3791
JO - Ceramics International
JF - Ceramics International
IS - 4
ER -