纳滤
光催化
材料科学
纳米棒
化学工程
膜
超滤(肾)
废水
过氧化氢
图层(电子)
纳米技术
催化作用
色谱法
废物管理
化学
有机化学
生物化学
工程类
作者
Yan Lv,Chao Zhang,Aiyong He,Shang-Jin Yang,Guang‐Peng Wu,Seth B. Darling,Zhi‐Kang Xu
标识
DOI:10.1002/adfm.201700251
摘要
Membrane fouling is one of the most severe problems restricting membrane separation technology for wastewater treatment. This work reports a photocatalytic nanofiltration membrane (NFM) with self‐cleaning property fabricated using a facile biomimetic mineralization process. In this strategy, a polydopamine (PDA)/polyethyleneimine (PEI) intermediate layer is fabricated on an ultrafiltration membrane via a co‐deposition method followed by mineralization of a photocatalytic layer consisting of β‐FeOOH nanorods. The PDA–PEI layer acts both as a nanofiltration selective layer and an intermediate layer for anchoring the β‐FeOOH nanorods via strong coordination complexes between Fe 3+ and catechol groups. In visible light, the β‐FeOOH layer exhibits efficient photocatalytic activity for degrading dyes through the photo‐Fenton reaction in the presence of hydrogen peroxide, endowing the NFM concurrently with effective nanofiltration performance and self‐cleaning capability. Moreover, the mineralized NFMs exhibit satisfactory stability under simultaneous filtration and photocatalysis processing, showing great potential in advanced wastewater treatment.
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