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New hydroxyapatite–hydrotalcite composites II. microwave irradiation effect on structure and texture

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Abstract

Acid-basic materials are often used to catalyse organic reactions. Hydroxyapatite is acidic and hydrotalcite presents basic properties. The association of both compounds in a single material should present a rather unique catalytic behavior. Three preparations of hydroxyapatite impregnated with hydrotalcite are presented. The effect of microwave irradiation, at different preparation levels, is discussed. A homogeneous distribution of hydrotalcite on hydroxyapatite surface is obtained when hydrotalcite is precipitated over a previously microwave irradiated hydroxyapatite. Instead, if the hydrotalcite mixture is incorporated to the hydroxyapatite precursor gel and the resulting mixture microwave irradiated, hydrotalcite is preferentially deposited in the hydroxyapatite interparticle spaces. When both hydroxyapatite and hydrotalcite solutions are irradiated, mixed and irradiated again, the composite behaves as the addition of the two components.

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Acknowledgements

The authors gratefully acknowledge the financial support of CONACYT and the technical work of L. Baños and J. Guzmán.

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Authors and Affiliations

  1. Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, Blvd. 18 Sur y Av. San Claudio, C.P. 72570, Puebla, PUE, Mexico

    J. A. Rivera & G. Fetter

  2. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, C.P. 04510, Mexico, DF, Mexico

    P. Bosch

Authors
  1. J. A. Rivera
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  2. G. Fetter
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  3. P. Bosch
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Correspondence to G. Fetter.

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Rivera, J.A., Fetter, G. & Bosch, P. New hydroxyapatite–hydrotalcite composites II. microwave irradiation effect on structure and texture. J Porous Mater 16, 409–418 (2009). https://doi.org/10.1007/s10934-008-9213-z

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  • DOI: https://doi.org/10.1007/s10934-008-9213-z

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