石墨烯
氧化物
材料科学
三聚氰胺
化学工程
过滤(数学)
吸收(声学)
渗透
X射线光电子能谱
核化学
膜
化学
纳米技术
复合材料
工程类
统计
冶金
生物化学
数学
作者
Shaolin Yang,Jinze Li,Cheng Zhen,Fangfang Li,Simiao Sha,Chunping Hou,Hui Lü,Jiandong Wu,Zhilin Sheng,Jinfu Ma
标识
DOI:10.1016/j.jece.2022.107543
摘要
To achieve oil/water separation using both absorption and filtration regardless of the oil/water density relationship, the super-hydrophilic/underwater super-oleophobic graphene oxide coated melamine sponge ([email protected]) and super-hydrophobic/super-oleophilic reduced graphene oxide coated melamine sponge ([email protected]) were prepared via dip-coating of graphene oxide (GO) sheets onto melamine sponge (MS) and subsequent chemical reduction, respectively. The structures of the [email protected] and [email protected] were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectra, and X-ray diffraction (XRD). Both [email protected] and [email protected] can preserve their original wettability in harsh environments containing acidic, alkaline, saline, and hot waters. The [email protected] and [email protected] show excellent capability for selective absorption of water and oil respectively, with high capacities of 72.3–136.5 g g−1 and excellent recyclability. The compressed [email protected] and [email protected] also exhibit high separation efficiency of about 99% and ultra-high permeation flux above 1.62 × 105 L m−2 h−1 for separating different oil/water mixtures containing light and heavy oils through filtration driven by gravity, respectively. Furthermore, a bidirectional separation setup assembled with the compressed [email protected] and [email protected] was constructed, which demonstrates high efficiency for continuously separating different oil/water mixtures of any oil density.
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