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Materials Science-Poland
Volume 39 (2021): Issue 2 (June 2021)
Open Access
Synthetic alkaline-earth hydroxyapatites: Influence of their structural, textural, and morphological properties over Co
2+
ion adsorption capacity
Francisco Granados-Correa
Francisco Granados-Correa
and
Juan Bonifacio-Martínez
Juan Bonifacio-Martínez
| Nov 10, 2021
Materials Science-Poland
Volume 39 (2021): Issue 2 (June 2021)
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Published Online:
Nov 10, 2021
Page range:
252 - 264
Received:
May 19, 2021
Accepted:
Sep 20, 2021
DOI:
https://doi.org/10.2478/msp-2021-0022
Keywords
barium hydroxyapatite
,
strontium hydroxyapatite
,
calcium hydroxyapatite
,
chemical precipitation synthesis
,
Co ion adsorption
© 2021 Francisco Granados-Correa et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Fig. 1
Chemical distribution of cobalt ionic species in aqueous media as a function of pH.
Fig. 2
XRD patterns of synthesized alkaline-earth hydroxyapatite powders prepared via chemical precipitation method followed by calcination at 1,100°C: (A) Ba-HAp, (B) Sr-HAp, and (C) Ca-HAp. Ba-HAp, barium hydroxyapatite; Ca-HAp, calcium hydroxyapatite; Sr-HAp, strontium hydroxyapatite.
Fig. 3
N2 adsorption-desorption isotherms of (A) Ba-HAp, (B) Sr-HAp, and (C) Ca-HAp powders. Ba-HAp, barium hydroxyapatite, Ca-HAp, calcium hydroxyapatite; Sr-HAp, strontium hydroxyapatite.
Fig. 4
SEM micrographs at 5,000 × and EDXS analysis of (A) Ba-HAp, (B) Sr-HAp, and (C) Ca-HAp powders. Ba-HAp, barium hydroxyapatite; Ca-HAp, calcium hydroxyapatite; Sr-HAp, strontium hydroxyapatite.
Fig. 5
FTIR spectrum of (A) Ba-HAp, (B) Sr-HAp, and (C) Ca-HAp powders. Ba-HAp, barium hydroxyapatite; Ca-HAp, calcium hydroxyapatite; Sr-HAp, strontium hydroxyapatite.
Textural characteristics of synthesized alkaline-earth hydroxyapatite materials and Co2+ ion adsorption capacities in percentage.
Sample
S
BET
(m
2
g
−1
)
a
V
t
(cm
3
g
−1
)
b
d
p
(nm)
c
Co
2+
ion adsorption capacity (%)
Ba-HAp
0.5216
0.0011
8.9231
6.03 ± 0.39
Sr-HAp
1.3874
0.0057
16.5310
17.46 ± 0.79
Ca-HAp
59.7000
0.1120
7.5046
56.84 ± 1.08