Here, for the first time, oxygenated amorphous carbon/graphite (a‐CO_x/G) hybrid nanofilaments are produced and used as the building blocks of a buckypaper membrane. The nanofilaments are in fact the innovatively chopped version of brittle, highly graphitized polyacrylonitrile precursor nanofibers. The high temperature (1250 °C) graphitization and then fast cooling bring about biphasic nanofibers made of graphite and amorphous carbon, readily reoxidized during cooling. The combination of polar and nonpolar domains in the nanofilaments governs a desirable amphiphilicity, thus selectivity to a variety of polar/nonpolar water pollutants. Through electrostatic and π–π interactions, the membrane efficiently discriminates amphiphilic castor oil as well as cationic methylene blue dye from water. Moreover, the buckypaper‐like structure of the membrane is 100% efficient in depth filtration of colloidal particles from water. The membrane's water flux is 16 times higher than that of commercial microfiltration membranes, promising an advanced energy/cost efficient filtration process. Thus, being multispectrally selective and highly water permeable, the a‐CO_x/G nanofilamentous membrane is regarded potentially a next‐generation, cost‐effective, and sustainable alternative to the long‐existing thin‐film composite membranes for water treatment.

中文翻译：

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柔性的氧碳石纳米丝巴基纸作为两亲性膜。

在这里，第一次是氧化的无定形碳/石墨（a-CO _x/ G）杂合纳米丝被生产出来并用作巴基纸膜的组成部分。实际上，纳米丝是脆性，高度石墨化的聚丙烯腈前体纳米纤维的创新型切碎版本。高温（1250°C）的石墨化，然后快速冷却，产生了由石墨和无定形碳制成的双相纳米纤维，在冷却过程中容易被再氧化。纳米丝中极性和非极性域的结合决定了理想的两亲性，因此对多种极性/非极性水污染物具有选择性。通过静电和π-π相互作用，该膜可有效区分水中的两亲蓖麻油和阳离子亚甲基蓝染料。此外，膜的布基纸状结构在从水中深度过滤胶体颗粒方面具有​​100％的效率。该膜的水通量是商业微滤膜的16倍，有望实现先进的能源/成本高效的过滤工艺。因此，a-CO具有多光谱选择性和高透水性_x / G纳米丝膜被认为是水处理领域中长期存在的薄膜复合膜的下一代，经济高效且可持续的替代品。