Abstract
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.
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