【RSC Adv】Enhanced catalytic degradation of 4-NP by superhydrophilic PVDF membrane decorated by Au nanoparticles
作者：Ziyang Wu, Haibo Lin, yunze wang, Xuemin Yu, Jinglong Li, Zhu Xiong, yi wang, Youju Huang, Tao Chen,Fu Liu
關鍵字：superhydrophilic PVDF membrane
論文來源：期刊
具體來源：RSC Adv., 2016, Accepted Manuscript
發表時間：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.