writer：Ziyang Wu, Haibo Lin , Yunze Wang , Xuemin Yu, Youju Huang, Tao Chen, Fu Liu*
keywords：PVDF, Au NPs, catalytic degradation
source：期刊
specific source：RSC Advances, 2016, 6, 62302-62309
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 47.84×10-2 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 7×10-2 min-1.