Insights into new calcium phosphosilicate xerogels using an advanced characterization methodology

Li, A., Wang, D., Xiang, J., Newport, Robert J., Reinholdt, M.X., Mutin, P.H., Vantelon, D., Bonhomme, C., Smith, M.E., Laurencin, D., and others. (2011) Insights into new calcium phosphosilicate xerogels using an advanced characterization methodology. Journal of Non-Crystalline Solids, 357 (19-20). pp. 3548-3555. ISSN 0022-3093. (doi:10.1016/j.jnoncrysol.2011.07.003) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:46963)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2011.07.003

Abstract

Amorphous calcium phosphosilicate xerogels of high phosphate content were synthesized by a new sol-gel route. Their structural characterization was achieved through the combination of complementary analytical methods, including advanced solid state NMR and scattering techniques. Two representative compositions, with similar P contents but a different Ca:Si ratio, have been chosen for detailed study. Using 43Ca solid state NMR and Ca K-edge XANES, the Ca local environment in the samples was characterized, revealing that it is similar for both compositions. It was found that POSi linkages are present in both compounds after calcination at 350 Â°C. However, for the sample with the lower Si content, a higher fraction of unusual 6-coordinated silicon was observed. Interestingly, calcium was also found to enhance the network connectivity and to enter the phosphosilicate network without the need for calcination at high temperature, which is advantageous in comparison with syntheses performed previously on similar compounds.

Item Type:	Article
DOI/Identification number:	10.1016/j.jnoncrysol.2011.07.003
Additional information:	Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - J Non Cryst Solids [Field not mapped to EPrints] AD - Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China [Field not mapped to EPrints] AD - NMR Facility, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury, CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Institut Charles Gerhardt de Montpellier, UMR 5253, UniversitÃ© de Montpellier 2-Case 1701, Place EugÃ¨ne Bataillon, 34095 Montpellier Cedex 5, France [Field not mapped to EPrints] AD - Synchrotron SOLEIL l'Orme des Merisiers, PO Box 48, Saint-Aubin, 91192 Gif sur Yvette cedex, France [Field not mapped to EPrints] AD - Laboratoire de Chimie de la MatiÃ¨re CondensÃ©e de Paris (LCMCP), UMR CNRS 7574, CollÃ¨ge de France, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France [Field not mapped to EPrints] AD - Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords:	Calcium phosphosilicate, Local environment, Sol-gel, Structural characterization, Analytical method, High temperature, Local environments, Network connectivity, Phosphosilicates, Scattering techniques, Si content, Sol-gel routes, Solid state NMR, Structural characterization, XANES, Calcination, Characterization, Light polarization, Sol-gel process, Sol-gels, Sols, Synthesis (chemical), Xerogels, Calcium
Subjects:	Q Science > QC Physics > QC173.45 Condensed Matter Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Giles Tarver
Date Deposited:	11 Feb 2015 12:26 UTC
Last Modified:	16 Nov 2021 10:19 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/46963 (The current URI for this page, for reference purposes)

University of Kent Author Information

Newport, Robert J..

Creator's ORCID:	https://orcid.org/0000-0002-2365-992X
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