Issue 15, 2024

Coral-mimetic production of aragonite films from CO2 captured by biogenic polyamines

Abstract

We designed CaCO3 films comprised of aragonite nanorods by mimicking the microstructure and the formation process of the calcareous skeleton of a stony coral in the sea. Hierarchically structured calcareous frameworks are produced from the center of calcification (COC) under alkaline conditions in the organism. In the first step, a seed layer consisting of crystalline nanoparticles was produced as an artificial COC on a polyvinyl alcohol sheet in a solution containing Ca2+ ions, polyacrylic acid, and a biogenic polyamine, such as putrescine, through the gradual absorption of atmospheric CO2. In the second step, aragonite nanorods grew on the artificial COC in the mother liquid obtained by mixing a putrescine solution saturated with CO2 and a CaCl2 solution containing Mg2+ and alginate. Finally, we obtained a dense, homogeneous film consisting of aragonite nanorods similar to the coral skeleton through the fixation of CO2.

Graphical abstract: Coral-mimetic production of aragonite films from CO2 captured by biogenic polyamines

Supplementary files

Article information

Article type
Paper
Submitted
08 Feb 2024
Accepted
04 Mar 2024
First published
25 Mar 2024
This article is Open Access
Creative Commons BY-NC license

CrystEngComm, 2024,26, 2065-2071

Coral-mimetic production of aragonite films from CO2 captured by biogenic polyamines

K. Takashina, H. Watanabe, Y. Oaki, Y. Ohno, K. Yasumoto and H. Imai, CrystEngComm, 2024, 26, 2065 DOI: 10.1039/D4CE00126E

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