Abstract Carbon nanotube (CNT) membranes with nano-enhanced superwettability show great potential in high-efficient oil/water separation. In this study, we present a novel polyphenol-metal manipulated nanohybridization strategy to prepare CNT nanohybrid membranes embedded with FeOOH nanorods (NRs). The polyphenol-metal manipulated nanohybridization strategy lies in the assembly of polyphenol-metal (chitosan/tannic acid-Fe3+) complex primer on the CNT membranes followed by in situ FeOOH NRs mineralizating. The polyphenol-metal complex modulates the uniform distribution of in situ mineralized FeOOH NRs in the as-prepared CNT@CS/TA-FeOOH nanohybrid membrane, which endows the CNT nanohybrid membrane with both superhydrophilicity and underwater superoleophobicity. By integrating the high permeability of CNT membranes and the hydrophilicity and photo-degradation activity of FeOOH NRs, the CNT@CS/TA-FeOOH nanohybrid membrane possesses achieved a high water permeability above 8000 Lm-2h-1bar-1 and greatly elevated flux recovery ratio above 97% for oil/water separation. Both hydration-induced antifouling property and photo-induced self-cleaning capability contributed to the robust flux recovery for highly efficient oil/water separation. The CNT@CS/TA-FeOOH nanohybrid membrane is promising for oily wastewater treatment applications, and the proposed polyphenol-metal manipulated nanohybridization strategy shows great potential for engineering various multifunctional nanohybrid membranes.

中文翻译：

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多酚金属操纵的 CNT 膜与 FeOOH 纳米棒的纳米杂化用于高通量、防污和自清洁油/水分离

摘要 具有纳米增强超润湿性的碳纳米管（CNT）膜在高效油/水分离方面显示出巨大的潜力。在这项研究中，我们提出了一种新的多酚金属操纵的纳米杂化策略来制备嵌入 FeOOH 纳米棒 (NRs) 的 CNT 纳米杂化膜。多酚-金属操纵的纳米杂化策略在于将多酚-金属（壳聚糖/单宁酸-Fe3+）复合底漆组装在 CNT 膜上，然后原位 FeOOH NRs 矿化。多酚-金属络合物调节了原位矿化的 FeOOH NRs 在所制备的 CNT@CS/TA-FeOOH 纳米杂化膜中的均匀分布，这使 CNT 纳米杂化膜具有超亲水性和水下超疏油性。通过结合CNT膜的高渗透性和FeOOH NRs的亲水性和光降解活性，CNT@CS/TA-FeOOH纳米杂化膜实现了高于8000 Lm-2h-1bar-1的高透水性和大大提高的通量回收率油/水分离率超过 97%。水化诱导的防污性能和光诱导的自清洁能力都有助于高效油/水分离的稳健通量回收。CNT@CS/TA-FeOOH 纳米杂化膜有望用于含油废水处理应用，所提出的多酚金属操纵纳米杂化策略在设计各种多功能纳米杂化膜方面显示出巨大潜力。CNT@CS/TA-FeOOH 纳米混合膜实现了高于 8000 Lm-2h-1bar-1 的高透水性，并且大大提高了油水分离通量回收率超过 97%。水化诱导的防污性能和光诱导的自清洁能力都有助于高效油/水分离的稳健通量回收。CNT@CS/TA-FeOOH 纳米杂化膜有望用于含油废水处理应用，所提出的多酚金属操纵纳米杂化策略在设计各种多功能纳米杂化膜方面显示出巨大潜力。CNT@CS/TA-FeOOH 纳米混合膜实现了高于 8000 Lm-2h-1bar-1 的高透水性，并且大大提高了油水分离通量回收率超过 97%。水化诱导的防污性能和光诱导的自清洁能力都有助于高效油/水分离的稳健通量回收。CNT@CS/TA-FeOOH 纳米杂化膜有望用于含油废水处理应用，所提出的多酚金属操纵纳米杂化策略在设计各种多功能纳米杂化膜方面显示出巨大潜力。水化诱导的防污性能和光诱导的自清洁能力都有助于高效油/水分离的稳健通量回收。CNT@CS/TA-FeOOH 纳米杂化膜有望用于含油废水处理应用，所提出的多酚金属操纵纳米杂化策略在设计各种多功能纳米杂化膜方面显示出巨大潜力。水化诱导的防污性能和光诱导的自清洁能力都有助于高效油/水分离的稳健通量回收。CNT@CS/TA-FeOOH 纳米杂化膜有望用于含油废水处理应用，所提出的多酚金属操纵纳米杂化策略在设计各种多功能纳米杂化膜方面显示出巨大潜力。