文献类型：期刊文献

英文题名：High efficient reduction of 4-nitrophenol and dye by filtration through Ag NPs coated PAN-Si catalytic membrane

作者：Li, Ping[1];Wang, Yixing[1];Huang, Hairong[1];Ma, Shuai[1];Yang, Hu[1];Xu, Zhen-liang[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：263

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20203609131118);WOS:【SCI-EXPANDED(收录号:WOS:000595802200132)】；

语种：英文

外文关键词：Ag NPs; Displacement-epitaxial growth; Catalytic membrane; 4-NP reduction

摘要：Catalytic membrane plays an important role in environmental remedy. In this study, we reported an Ag coated membrane (PAN-Si-Cu-Ag) with a high catalytic activity to reduce 4-nitrophenol (4-NP) and methyl orange (MO) from water. The best performance is 99% reduction degree and 280 L m(-2). h(-1). bar(-1) flux for (4-NP) reduction at 4-NP: NaBH4 = 1:50 (mM) during a 12-h filtration. The reduction degree for MO is above 90% and the flux is about 230 L m(-2).h(-1).bar(-1), which is almost the best report till now. The Ag coated membrane was prepared by metal displacement-epitaxial growth on silica covalent grafted PAN membrane (PAN-Si). Silica atoms were used as linker to ensure the good adhesion between polymer and metal NPs, the loss amount of Ag NPs from the coated catalytic membrane is loss about 2 mg/cm(2) after one month storage. Cheap metal NPs were firstly reduced on the surface of PAN-Si membrane and then used to displace Ag ions. Thus the obtained catalytic membrane showed a very high loading (28%). Finally, the catalytic filtration mechanism of 4-NP was distinguished by Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and adsorption measurement. (C) 2020 Elsevier Ltd. All rights reserved.