Zinc-substituted hydroxyapatite produced from calcium precursor derived from eggshells

Mardziah, C. M. and Kuldip Singh, Ramesh Singh. and Tan, Chou Yong and Thambinayagam, Hari Chandran and Sidhu, Amritpal Singh and Krishnasamy, Sivakumar and Purbolaksono, J. (2021) Zinc-substituted hydroxyapatite produced from calcium precursor derived from eggshells. Ceramics International, 47 (23). pp. 33010-33019. ISSN 0272-8842, DOI https://doi.org/10.1016/j.ceramint.2021.08.201.

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The availability of natural calcium derived from biowaste materials is an inexpensive alternative to commercial calcium reagents used to produce calcium phosphate bioceramics. This approach is more ecofriendly, cost effective and sustainable owing to its abundant availability. In this study, zinc-substituted hydroxyapatite (ZnHA-Es) was synthesised using calcium precursor derived from eggshells through precipitation method. Zn concentration was varied from 1 mol% to 5 mol% during the synthesis, and the derived powders were calcined at 700 degrees C in air atmosphere. XRD analysis revealed that ZnHA-Es powders were highly crystalline and comprised biphasic mixtures of HA as the major phase and beta-tricalcium phosphate as the minor phase. FTIR examination indicated that all ZnHA-Es samples had a similar structure to pure HA as evidenced by the presence of frequency bands corresponding to phosphate, carbonate and hydroxyl functional groups. The disappearance of vibrational bands of carbonate groups became more apparent with increased Zn concentration. Microstructure analysis revealed that the derived nanostructured particles were spherical (approximately 40-100 nm in diameter) regardless of Zn substitution.

Item Type: Article
Funders: Ministry of Education, Malaysia [600-IRMI/FRGS 5/3 (159/2019)] [FP020-2018A]
Uncontrolled Keywords: Hydroxyapatite; Eggshells; Zinc-substituted HA; Nano-particles; Phase analysis; Morphological properties
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Medicine
Depositing User: Ms Zaharah Ramly
Date Deposited: 18 Aug 2022 01:44
Last Modified: 18 Aug 2022 01:44
URI: http://eprints.um.edu.my/id/eprint/28775

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