Ultra-low-density GNS/CA composite aerogels with ultra-high specific surface for dye removal

摘要: Ultra-low-density graphene nanosheet (GNS)/carbon composite aerogels (CAs) were prepared via GO (graphene oxide)/RF (resorcinol–formaldehyde) aerogel composite, supercritical fluid drying, and carbonization. Graphene oxide was found to act as an efficient anti-shrinkage additive in the carbonization process, making linear shrinkage ratios decrease from 78 % only 10 % (25 % content). The density of thus decreases 115 24.4 mg cm−3. 25 % GO-composited exhibits over two times modulus increase 11 specific comparison with pure carbon aerogel. microstructure results show that is fully cross-linked RF polymers, makes reaction more sufficient ultimately strengthens nanostructure withstand damage resultant exhibited super high surface area (as 2899 m2 g−1), good mechanical property, adsorption capacity 403 mg g−1 for methylene blue.