Abstract Porous graphene film (PGF) with unique surface consisting mostly of thermal-exfoliated worm-like graphene sheets were fabricated through flame expansion-exfoliation of graphene oxide film with non-exfoliated graphite oxide powders precipitated at its bottom. The resultant PGF showed not only faster adsorption rate during oil/solvent collection in comparison with traditional PGFs, but also similar high adsorption capacity and reliable recyclability. For instance, the adsorption capacities of the new PGF for organic solvents were in the range of ~11–33 times of its own weight, and they displayed good stability during ten exchange-evaporation recycling process. Moreover, this approach can be easily scalable and applied to prepare other PGF composites.

中文翻译：

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具有蠕虫状石墨烯表面的多孔石墨烯薄膜作为油和有机溶剂的超快吸附剂

摘要 通过火焰膨胀-剥离氧化石墨烯薄膜并在其底部沉淀非剥落的氧化石墨粉末，制备了具有独特表面的多孔石墨烯薄膜（PGF），该薄膜主要由热剥落的蠕虫状石墨烯片组成。与传统 PGF 相比，所得 PGF 不仅在油/溶剂收集过程中表现出更快的吸附速率，而且具有相似的高吸附能力和可靠的可回收性。例如，新型 PGF 对有机溶剂的吸附能力约为自身重量的 11-33 倍，并且在十次交换蒸发循环过程中表现出良好的稳定性。此外，这种方法可以轻松扩展并应用于制备其他 PGF 复合材料。