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首页> 外文期刊>RSC Advances >Enhanced catalytic degradation of 4-NP using a superhydrophilic PVDF membrane decorated with Au nanoparticles
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Enhanced catalytic degradation of 4-NP using a superhydrophilic PVDF membrane decorated with Au nanoparticles

机译：使用用Au纳米粒子装饰的超无水PVDF膜增强4-NP的催化降解

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Poly(vinylidene fluoride) (PVDF) membranes have been widely applied to treat wastewater, however, the removal of toxic aromatic phenolic compounds remains a technical challenge due to the serious adsorption fouling and difficult degradation. Herein, we aimed to design a superhydrophilic PVDF membrane decorated with Au nanoparticles, which enhanced the rapid degradation of p-nitrophenol (4-NP). The superhydrophilic PVDF membrane with a micro/nano structured surface was decorated with Au nanoparticles via poly(dopamine) (PDA) as a spacer. The influences of membrane affinity (e.g. Hydrophilic Membrane (HM), micro/nano structured superhydrophilic membrane (MSiM), and micro/nano structured superhydrophobic membrane (MSoM)) on PDA deposition and the subsequent Au decoration were comprehensively investigated. The synthesized Au nanoparticles were characterized using transmission electron microscopy (TEM) and UV-vis absorption spectra. The morphology and composition was evaluated using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Static catalytic experiments demonstrated that MSiM degraded over 90% of 4-NP in 5 minutes with a kinetic reaction rate constant of 47.84 x 10(-2) min(-1) and high stability over 6 cycles. A membrane catalytic reactor (MCR) was designed to realize the continuous catalytic degradation of 4-NP with a kinetic reaction rate constant of 7 x 10(-2) min(-1).
机译：聚（偏二氟乙烯）（PVDF）膜已广泛应用于处理废水，然而，由于严重的吸附污染和困难降解，去除有毒芳族酚类化合物仍然是技术挑战。在此，我们旨在设计一种用Au纳米颗粒装饰的超硫酸化PVDF膜，其增强了对硝基苯酚（4-NP）的快速降解。具有微/纳米结构表面的超硫酸PVDF膜用Au纳米粒子通过聚（多巴胺）（PDA）作为间隔物装饰。膜亲和力（例如亲水性膜（HM），微/纳米结构的超疏水膜（MSIM）和微/纳米结构超疏水膜（MSOM）的影响，全面研究了PDA沉积和随后的Au装饰。使用透射电子显微镜（TEM）和UV-Vis吸收光谱表征合成的Au纳米颗粒。使用扫描电子显微镜（SEM）和X射线光电子谱（XPS）评估形态和组合物。静态催化实验证明，MSIM在5分钟内以47.84×10（-2）min（-1）的动力反应速率常数为50％以上的4-NP降解了4-NP的90％，高稳定性超过6个循环。设计膜催化反应器（MCR），以实现4-NP的连续催化降解，其动力学反应速率为7×10（-2）min（-1）。

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  • 来源
    《RSC Advances》 |2016年第67期|共8页
  • 作者

    Wu Ziyang; Lin Haibo; Wang Yunze; Yu Xuemin; Li Jinglong; Xiong Zhu; Wang Yi; Huang Youju; Chen Tao; Liu Fu;

  • 作者单位

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol &

    Engn Ningbo 315201 Zhejiang Peoples R China;

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