Structural and morphological analysis of zinc incorporated non-stoichiometric hydroxyapatite nano powders

Abstract

In this study, Zn incorporated non-stoichiometric hydroxyapatite (nHAp) was synthesized via precipitation method and effect of the incorporation of Zn (fraction: 2, 4, 6 and 8 mol-%) on the microstructure of nHAp was studied by XRD, FTIR analysis and SEM-EDS techniques. The formation of nHAp was confirmed by XRD and FTIR those showed that no secondary phase was formed through the Zn incorporation. The SEM studies also revealed that particles were formed in nano-metric size (30-60 nm). It was found that crystallite and particle size of Zn incorporated nHAp gradually decreased up to 6 mol-%, and started to increase while the Zn fraction reached up to the 8 mol-% and hence the morphology of the aggregated products was also changed. It can be concluded that the incorporation of Zn cations cause to form nHAp phase. Furthermore, the nHAp microstructure has deviated from stoichiometric condition by incorporation of more Zn cations.

Enhanced antimicrobial properties and bioactivity of 3D-printed titanium scaffolds by multilayer bioceramic coating for large bone defects

“…Zn0.3-AgHAP and Zn0.6-AgHAP powders consist of two phases: pure HAP and ZnO. It can be seen that the intensity of AgHAP peaks in the diffractograms of the samples with ZnO slightly decreases with increasing Zn content, as was also found in the work of Esfahani et al [35]. Moreover, after calcination at 850 • C, the crystallinity of both HAP and ZnO phases increase and is more pronounced in Zn0.6-AgHAP powder, which is in accordance with SEM observation.…”

Synthesis and characterizations of natural limestone-derived nano-hydroxyapatite (HAp): a comparison study of different metals doped HAps on antibacterial activity

“…With this composition, the ratio of Ca/P is 1.68 which is slightly higher than stoichiometric HAp (Ca/P = 1.67) and the pristine HAp is categorized as a non-stoichiometric HAp. 38 XPS composition analyses of Ag-HAp showed Ag, Ca, P and O were 0.90, 16.84, 10.02, and 72.24%, respectively. Similar to that un-doped HAp, the Ca/P ratio of Ag-HAp was also about 1.68.…”

Effect of HA Nanoparticles on Adsorption of Vitamin D3 on Super-Hydrophobic PA6 Nanofibrous Scaffold

“…The HA NPs were synthesized in accordance to the wet chemical precipitation method commonly described in literature [28,29]. The polymer solution was prepared by dissolving 2 and 20 wt% of HA NPs and PA6 granules (1015b UBE, M w ; 15,000 g.mol -1 ) in formic acid (Sigma Aldrich, 64-18-6), respectively.…”