Surface treatment of calcium hydroxyl and fluoroapatite by (NH4)6[P2W18O62]·14H2O polyoxometalate [P2W18]

Abdallah Aissa; Habiba Meskini; Mongi Debbabi

doi:10.1016/j.rechem.2020.100048

Results in Chemistry (Jan 2020)

Surface treatment of calcium hydroxyl and fluoroapatite by (NH4)6[P2W18O62]·14H2O polyoxometalate [P2W18]

Abdallah Aissa,
Habiba Meskini,
Mongi Debbabi

Affiliations

Abdallah Aissa: Chemistry Department, Faculty of Sciences and Arts of Khulais, Jeddah University, 21959, Saudi Arabia; Laboratory of Physico-Chemistry of Materials, Faculty of Sciences of Monastir, Monastir 5019, Tunisia; Corresponding author at: Chemistry Department, Faculty of Sciences and Arts of Khulais, Jeddah University, 21959, Saudi Arabia.
Habiba Meskini: Laboratory of Physico-Chemistry of Materials, Faculty of Sciences of Monastir, Monastir 5019, Tunisia
Mongi Debbabi: Laboratory of Physico-Chemistry of Materials, Faculty of Sciences of Monastir, Monastir 5019, Tunisia

DOI: https://doi.org/10.1016/j.rechem.2020.100048
Journal volume & issue: Vol. 2
p. 100048

Abstract

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The present paper details the surface modification of pure calcium hydroxyl and fluoroapatite (CaHAp and CaFAp) by grafting β-[P2W18O62]6− polyoxometalate (P2W18) with 1:1 and 1:5 mass ratio. The specific surface area (SSA) for pure materials, the X-ray diffraction pattern, the FTIR and the 31P MAS-NMR spectroscopy were used to compare the surface reactivity of CaHAp and CaFAp. These techniques show that the surface of hydroxyapatite is more reactive than that of the fluoroapatite. The reactivity is mainly related to the presence of ≡POH active sites, which are generated by the protonated form of phosphate group (HPO42−).

Published in Results in Chemistry

ISSN: 2211-7156 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/results-in-chemistry/

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