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Research Letters in Materials Science
Volume 2009, Article ID 138476, 3 pages
Research Letter

Preparation and Characterization of a Calcium Carbonate Aerogel

1Chair for Construction Chemicals, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, Germany
2Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
3Omya Development AG, Baslerstraße 42, P.O. Box 335, 4665 Oftringen, Switzerland

Received 22 October 2008; Accepted 2 April 2009

Academic Editor: Manish U. Chhowalla

Copyright © 2009 Johann Plank et al. 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.


We report on a facile method for the preparation of a calcium carbonate aerogel consisting of aggregated secondary vaterite particles with an approximate average diameter of 50 nm. It was synthesized via a sol-gel process by reacting calcium oxide with carbon dioxide in methanol and subsequent supercritical drying of the alcogel with carbon dioxide. The resulting monolith was opaque, brittle and had overall dimensions of 6 × 2 × 1  cm. It was characterized by X-ray powder diffraction, nitrogen adsorption method (BET), and scanning electron microscopy.