Novel graphene oxide aerogel microspheres (GOAMs) with well-defined “center-diverging microchannel” structures are obtained by a novel approach, i.e. a combination of electrospraying and freeze-casting. A formation mechanism, i.e. radial-directional freezing–thawing, was proposed. The reduced GOAMs exhibit excellent adsorption ability for various organic liquids and oils due to their highly hierarchical hydrophobic structure and a random packing effect.
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Liao et al. (2015) studied this question.
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