It
is a challenge to fabricate three-dimensional carbon aerogels
based on natural renewable resources with stability, flexibility,
and versatility. Here, an ultralight, elastic, and hydrophobic multifunctional
reduced graphene oxide-konjac glucomannan (RGO-KGM) carbon aerogel
was fabricated by a three-step process of freeze-casting, freeze-drying,
and carbonization. In the freeze-casting process, three unique structural
RGO-KGM carbon aerogels were obtained by adjusting the position of
the PDMS mold on the homemade directional freezer. RGO-KGM carbon
aerogels possessed many excellent physicochemical properties, such
as ultralow density, high specific surface area, elasticity, hydrophobicity,
and controllable size. As an adsorbent, RGO-KGM carbon aerogels exhibited
high adsorption capacity for various organic solvents and oils, and
the maximum adsorption capacity reached up to 360 g/g. Therefore,
RGO-KGM carbon aerogels with good mechanical properties and reusability
shows promising prospects in the field of water treatment.
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