Highly Efficient Purification of Mult-component Wastewater by Electrospinning Kidney-beans-skin-like Porous H-PPAN/rGO-g-PAO@Ag+/Ag Composite Nanofibrous Membrane

Due to the complexity of harmful wastewater components, environmental and multifunctional materials are required for sewage purification. In this paper, a novel kidney-bean-skin-like hydrophilic porous polyacrylonitrile/reduced graphene oxide-g-poly amidoxime loaded Ag+ (H-PPAN/rGO-g-PAO@Ag+/Ag) composite nanofibers membrane was fabricated by combining electrospinning and hydrolysis method. The spinning solution was pumped at a rate of 0.4 mL/h with the voltage set at a constant value of 23 kV. Then a part of -CN groups switched to hydrophilic -COOH groups via hydrolysis method, which acts as a linker of GO-g-PAN, Ag+ and PAN matrix. The further step of chelation and thermal treatment were used for generating Schottky junctions between rGO-g-PAO@Ag+ and Ag. After five cycles tests, it exhibited outstanding mechanical property ensuring the filtration and purification performance of H-PPAN/rGO-g-PAO@Ag+/Ag composite nanofiber membrane (i.e. the tensile strength was still 7.21 MPa and the elongation was 61.5...