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Materials 2009, 2(4), 1508-1519; doi:10.3390/ma2041508

Hydroxyapatite/MCM-41 and SBA-15 Nano-Composites: Preparation, Characterization and Applications

* ,
Grupo Fisicoquímica de Nuevos Materiales, Centro de Investigación y Tecnología Química (CITeQ), Facultad Córdoba, Universidad Tecnológica Nacional, 5016 Córdoba, Argentina
* Author to whom correspondence should be addressed.
Received: 29 July 2009 / Revised: 28 September 2009 / Accepted: 29 September 2009 / Published: 30 September 2009
(This article belongs to the Special Issue Composite Materials)
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Composites of hydroxyapatite (HaP) and highly ordered large pore mesoporous silica molecular sieves such as, Al-SBA-15 and Al-MCM-41 (denoted as SBA-15 and MCM-41. respectively) were developed, characterized by XRD, BET, FTIR, HRTEM and NMR-MAS, and applied to fluoride retention from contaminated water. The proposed procedure by a new route to prepare the HaP/SBA-15 and HaP/MCM-41, composites generates materials with aluminum only in tetrahedral coordination, according to the 27Al NMR-MAS results. Free OH- groups of HaP nanocrystals, within the hosts, allowed high capacity fluoride retention. The activity of fluoride retention using HaP/MCM-41 or HaP/SBA-15 was 1-2 orders of magnitude greater, respectively, than with pure HaP.
Keywords: HaP/ MCM-41; HaP/ SBA-15; nanocomposites; F- retention; water HaP/ MCM-41; HaP/ SBA-15; nanocomposites; F- retention; water
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Anunziata, O.A.; Martínez, M.L.; Beltramone, A.R. Hydroxyapatite/MCM-41 and SBA-15 Nano-Composites: Preparation, Characterization and Applications. Materials 2009, 2, 1508-1519.

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