Strontium Doped Hydroxyapatite Nanoparticles: Synthesis, Characterization and Simulation

Zihang ZHOU; Qun WANG; Xiang GE; Zhaoyang LI

doi:10.15541/jin20180439

Journals >Journal of Inorganic Materials >Volume 35 >Issue 11 >Page 1283 > Article

Journal of Inorganic Materials
Vol. 35, Issue 11, 1283 (2020)

Strontium Doped Hydroxyapatite Nanoparticles: Synthesis, Characterization and Simulation

Zihang ZHOU¹, Qun WANG², Xiang GE^3、*, and Zhaoyang LI^1、*

Author Affiliations

¹School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China

²College of Life Science and Biotechnology, MianYang Teachers’ College, Mianyang 621006, China;

³Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, School of Mechanical Engineering, Tianjin University, Tianjin 300354, China

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DOI: 10.15541/jin20180439 Cite this Article

Zihang ZHOU, Qun WANG, Xiang GE, Zhaoyang LI. Strontium Doped Hydroxyapatite Nanoparticles: Synthesis, Characterization and Simulation[J]. Journal of Inorganic Materials, 2020, 35(11): 1283 Copy Citation Text

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1. (a) XRD patterns of HA and Sr-doped HA nanoparticles with (b) magnified (200) peaks, and (c) (300) peaks

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2. SEM images of HA and Sr-doped HA nanoparticles (a) HA; (b) 10%Sr-HA; (c) 50%Sr-HA; (d) 100%Sr-HA

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3. Morphology of Sr doped HA

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4. SAED patterns of samples with different Sr concentrations (a) HA; (b) 10%Sr-HA; (c) 50%Sr-HA; (d) 100%Sr-HA

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5. Unit cell of (a) HA, (b) 1Sr-Ca(1)-HA, (c) 2Sr-Ca(1)- 3Sr-Ca(2)-HA, (d) 10Sr-HA after structural optimization Calcium (1): light blue; Calcium (2): green; Strontium: dark blue; Phosphorus: pink; Oxygen: red; Hydrogen: white

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S1. The unit cell of (a) 1Sr-Ca(2)-HA, (b) 4Sr-Ca(1)-1Sr-Ca(2)-HA, (c) 3Sr-Ca(1)-2Sr-Ca(2)-HA, (d) 1Sr-Ca(1)-4Sr-Ca(2)-HA, (e) 5Sr-Ca(2)-HA after structural optimization. Color codes: Calcium (1): light blue, Calcium (2): green, Strontium: dark blue, Phosphorus: pink, Oxygen: red, Hydrogen: white

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Sample	Ca/mol%	Sr/mol%	P/mol%	n(Ca+Sr)/n(P)	n(Ca)/n(P)	n(Sr)/n(P)	n(Sr)/n(Ca+Sr)
HA	62.02	0.03	37.95	-	1.634	-	-
10%Sr-HA	55.98	5.64	38.38	1.605	1.459	0.147	0.092
50%Sr-HA	31.85	30.59	37.56	1.662	0.847	0.814	0.490
100%Sr-HA	0.05	63.85	36.10	-	-	1.769	-

Table 1.

Chemical composition of nanoparticles measured by EDS

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Sample	Ca/mol%	Sr/mol%	P/mol%	n(Ca+Sr)/n(P)	n(Ca)/n(P)	n(Sr)/n(P)	n(Sr)/n(Ca+Sr)
HA	62.19	0.06	37.75	-	1.647	-	-
10%Sr-HA	56.49	5.77	37.74	1.649	1.497	0.153	0.093
50%Sr-HA	31.85	30.57	37.58	1.660	10.848	0.813	0.490
100%Sr-HA	0.08	62.26	37.66	-	-	1.653	-

Table 2.

Element content of nanoparticles measured by ICP

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Sample	Crystallinity	2θ₍₀₀₂₎/(°)	2θ₍₃₀₀₎/(°)	a/nm	c/nm
HA	53.3%	26.07	33.09	0.93679	0.68286
10%Sr-HA	51.1%	25.68	32.76	0.94625	0.69326
50%Sr-HA	49.4%	25.12	32.34	0.95814	0.71056
100%Sr-HA	73.7%	24.34	31.58	0.98058	0.73071

Table 3.

Lattice parameters and crystallinity of nanoparticles obtained by XRD

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Method	Model	a/nm	b/nm	c/nm	V/nm³	Formation energy/eV
DFT	HA	0.9642	0.9642	0.6853	5517
	1Sr-1Ca(1)-HA	0.9695	0.9695	0.6910	5595	-0.307
	1Sr-1Ca(2)-HA	0.9717	0.9727	0.6897	5603	-0.250
	4Sr-4Ca(1)-1Sr-1Ca(2)-HA	0.9724	0.9744	0.7219	5879	-0.404
	3Sr-3Ca(1)-2Sr-2Ca(2)-HA	0.9765	0.9799	0.7159	5897	-0.346
	2Sr-2Ca(1)-3Sr-3Ca(2)-HA	0.9778	0.9841	0.7117	5891	-0.557
	1Sr-1Ca(1)-4Sr-4Ca(2)-HA	0.9788	0.9869	0.7108	5894	-0.369
	5Sr-5Ca(2)-HA	0.9809	0.9861	0.7113	5906	-0.259
	10Sr-HA	0.9922	0.9922	0.7361	6274	-0.321
Experiment	HA	0.9368	-	0.6829	-	-
	10%Sr-HA	0.9463	-	0.6933	-	-
	50%Sr-HA	0.9581	-	0.7106	-	-
	100%Sr-HA	0.9806	-	0.7307	-	-

Table 4.

Lattice parameters and formation energy calculated by DFT method and lattice parameters (a & c) obtained from experiments

Zihang ZHOU, Qun WANG, Xiang GE, Zhaoyang LI. Strontium Doped Hydroxyapatite Nanoparticles: Synthesis, Characterization and Simulation[J]. Journal of Inorganic Materials, 2020, 35(11): 1283

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