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首页> 外文期刊>ACS applied materials & interfaces >Nanofiltration Membranes with Metal Cation-Immobilized Aminophosphonate Networks for Efficient Heavy Metal Ion Removal and Organic Dye Degradation
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Nanofiltration Membranes with Metal Cation-Immobilized Aminophosphonate Networks for Efficient Heavy Metal Ion Removal and Organic Dye Degradation

机译：具有金属阳离子固定化氨基膦酸盐网络的纳滤膜，用于高效重金属离子去除和有机染料降解

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摘要

Modifications to the surface of polymeric membranes to integrate supplemental properties like surface charge or catalytic activity are the cornerstone of the membrane process advancement to effectuate improvements in functionality and selectivity. Herein, a new approach is demonstrated to construct nanofiltration membranes with a metal-organic coordinated selective layer. Polyethylenimine (PEI) was integrated with phosphite linkages to form a characteristic aminophosphonate ester polymer based on the Kabachnik-Fields reaction, and a thin polymer layer was deposited on an ultrafiltration (UF) membrane to form the aminophosphonate networks surface-modified membranes. The aminophosphonate polymer interlayer facilitated the immobilization of metal cation moieties through the strong coordinative chemical bonding with the amino groups and phosphite moieties. Typically, the incorporated Fe3+ strengthened the membranes' electropositivity leading to excellent heavy metal ion removal (>98%) and efficient organic dye separation (>99.8%). Meanwhile, the strategy also enabled the embedment of a photocatalytic layer comprising nanoneedle-like alpha-FeOOH that endowed the membrane with high photo-Fenton activity for organic dye mineralization. Subsequently, the alpha-FeOOH-embedded membrane afforded the photocatalytic self-cleaning potentiality for organic fouling mitigation. This contribution underscores the prospect of advancing the integration of metal specific functionalities and the membrane process for advanced membrane technologies in water treatment.
机译：对聚合物膜表面的修饰以整合表面电荷或催化活性的补充性质是膜过程进程的基石，以实现功能性和选择性的改善。在此，证明了一种用金属 - 有机协调选择性层构建纳米过滤膜。聚乙烯氨基（PEI）与亚磷酸酯键合，以形成基于Kabachnik-田的反应的特征氨基磷酸酯聚合物，并在超滤（UF）膜上沉积薄的聚合物层，以形成氨基磷酸盐网络表面改性膜。氨基膦酸盐聚合物中间层促进了通过与氨基和亚磷矿部分的强协调化学键合的金属阳离子部分固定。通常，掺入的Fe3 +加强了膜的电性能，导致优异的重金属离子去除（> 98％）和有效的有机染料分离（> 99.8％）。同时，该策略还使包含纳米葡萄片样α-FeO​​OH的光催化层的嵌入，该α-FeO​​H为有机染料矿化具有高光芬活动的膜。随后，α-FeO​​OH嵌入膜得到了有机污垢缓解的光催化自清洁潜力。这种贡献强调了推进金属特定功能的整合和用于水处理晚期膜技术的膜工艺的前景。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第33期|共15页
  • 作者

    Soyekwo Faizal; Liu Changkun; Zhao Lihua; Wen Hao; Huang Wei; Cai Chaojie; Kanagaraj Palsamy; Hu Yunxia;

  • 作者单位

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Shenzhen Univ Coll Chem &

    Environm Engn Xili Campus 1066 Xueyuan Blvd Shenzhen 518071 Peoples R China;

    Tianjin Polytech Univ Coll Mat Sci &

    Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    nanofiltration; surface modification; heavy metals; Kabachnik-Fields reaction; photo-Fenton;

    机译：纳滤;表面改性;重金属;Kabachnik-Fields反应;照片芬顿;

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