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Peroxide-doped apatites: Preparation and effect of synthesis parameters

Vandecandelaere, Nicolas and Bosc, Françoise and Rey, Christian and Drouet, Christophe Peroxide-doped apatites: Preparation and effect of synthesis parameters. (2014) Powder Technology, 255. 3-9. ISSN 0032-5910

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Official URL: http://dx.doi.org/10.1016/j.powtec.2013.09.015

Abstract

This contribution focused on the preparation of peroxide-doped calciumphosphate apatites—in viewof potential uses as bioactive bioceramics with antimicrobial functions, and on their main physico-chemical characteristics. Two synthesis routeswere investigated. First, the hydrolysis of β-TCP in the presence ofH2O2 was followed. However, only elevated concentrations inH2O2 in themediumor temperatures around 150 °C allowed us to reach the complete β-TCP-to-apatite hydrolysis process, and the obtained samples exhibited a high crystallinity state with no non-apatitic chemical environments. The second protocol tested consisted in the direct apatite precipitation in the presence of H2O2 in themedium (at room temperature). This protocol led to single-phased nanocrystalline apatites, and our data indicate that part of the apatitic OH− ions were substituted by oxygenated species, and typically by peroxide ions (quantified). Physico-chemical modifications in the form of an improvement in crystallinity state, an increase in unit cell volume, and the presence of additional Raman bands were noticed and discussed.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Powder Technology website : http://www.sciencedirect.com/science/journal/00325910
HAL Id:hal-01073854
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:10 Oct 2014 13:52

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