Chapter 3. Investigations on the Nature of Biomineralized Silica by X-Ray Absorption Spectroscopy and Sorption Measurements

  1. Prof. Norbert Auner5 and
  2. Prof. Johann Weis6
  1. Gallus Schechner1,
  2. Peter Behrens1,
  3. Michael Fröba2,
  4. Bernd Pillep3 and
  5. Joe Wong4

Published Online: 28 APR 2008

DOI: 10.1002/9783527619917.ch3

Organosilicon Chemistry IV: From Molecules to Materials

Organosilicon Chemistry IV: From Molecules to Materials

How to Cite

Schechner, G., Behrens, P., Fröba, M., Pillep, B. and Wong, J. (2000) Investigations on the Nature of Biomineralized Silica by X-Ray Absorption Spectroscopy and Sorption Measurements, in Organosilicon Chemistry IV: From Molecules to Materials (eds N. Auner and J. Weis), Wiley-VCH Verlag GmbH, Weinheim, Germany. doi: 10.1002/9783527619917.ch3

Editor Information

  1. 5

    Inst. für Anorganische Chemie, der Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt am Main, Germany, Phone: 0 69/7 98-29180, -29591, Fax: 069/798-29188

  2. 6

    Wacker-Chemie GmbH, Geschäftsbereich S, Werk Burghausen, Johannes-Hess-Strasse 24, D-84489 Burghausen, Germany

Author Information

  1. 1

    Institut für Anorganische Chemie, Universität Hannover Callinstr. 9, D-30167 Hannover, Germany Tel.: Int. code + (511)762 4897— Fax.: Int. code + (511)762 3006

  2. 2

    Institut für Anorganische und Angewandte Chemie Universität Hamburg, Germany.

  3. 3

    Institut für Anorganische Chemie Ludwig-Maximilians-Universität München, Germany.

  4. 4

    Lawrence Livermore National Laboratory, University of California PO Box 808, Livermore, USA.

Publication History

  1. Published Online: 28 APR 2008
  2. Published Print: 17 JAN 2000

ISBN Information

Print ISBN: 9783527298549

Online ISBN: 9783527619917

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Keywords:

  • biomineralization;
  • rice husks;
  • silica;
  • XANES;
  • BET isotherme

Summary

Biomineralized silicas are generally described as amorphous gel-like or opaline-type varieties of hydrated SiO2. Our X-ray absorption spectroscopic investigation reveals mid-range order in one of these materials (rice husk silicas) at a length scale of 4–10 Å. The degree of ordering depends on the method used to extract the silica from the samples. This is clearly shown by the investigation of three differently treated rice husk silicas. As confirmed by N2 sorption experiments, these commercially interesting materials exhibit high specific surface areas and broad pore size distributions.