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Szczurek, A.; Amaral-Labat, G.; Fierro, V.; Pizzi, A.; Masson, E.; Celzard, A.
Carbon (New York), 07/2011, Letnik: 49, Številka: 8Journal Article
Tannin–formaldehyde carbon aerogels were prepared based on organic gels obtained by sol–gel polymerisation of tannin with formaldehyde that have been dried with supercritical acetone and pyrolysed at 900 °C. Tannins drastically reduce the cost of the gels, typically by a factor five, and polymerise in a wide range of pHs, leading to porous carbonaceous materials whose mesopore fraction ranges from 57% to 78%. The surface area and the total porosity can be as high as 715 m 2 g −1 and 95%, respectively. Pore volumes and micro-mesopore-size distributions are similar to those of much more expensive carbon aerogels derived from resorcinol–formaldehyde resin. However, more easily adjustable pore textures may be obtained using tannins as precursors.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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