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【RSC Adv】Enhanced catalytic degradation of 4-NP by superhydrophilic PVDF membrane decorated by Au nanoparticles
writer:Ziyang Wu, Haibo Lin, yunze wang, Xuemin Yu, Jinglong Li, Zhu Xiong, yi wang, Youju Huang, Tao Chen,Fu Liu
keywords:superhydrophilic PVDF membrane
source:期刊
specific source:RSC Adv., 2016, Accepted Manuscript
Issue time:2016年
Poly(vinylidene fluoride) (PVDF) membranes have been widely applied to treat wastewater, however, the removal of toxic aromatic phenolic compounds remains a technique challenge due to the serious adsorption fouling and difficult degradation. Herein, we aim to design a superhydrophilic PVDF membrane decorated by Au nanoparticles, which enhanced the rapid degradation of p-Nitrophenol (4-NP). The superhydrophilic PVDF membrane with micro/nano structured surface was particularly decorated by 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 subsequent Au decoration were comprehensively investigated. The synthesized Au nanoparticles were characterized by Transmission electron microscope (TEM) and UV-vis absorption spectra. The morphology and composition was evaluated by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). Static catalytic experiments demonstrated that MSiM degraded over 90% of 4-NP in 5 minutes with the kinetic reaction rate constant of 47.84[times]10-2 min-1 and high stability in 6 cycles. A membrane catalytic reactor (MCR) was designed to realize the continuous catalytic degradation of 4-NP with the kinetic reaction rate constant of 7[times]10-2 min-1.