Preparation of electrospun magnetic polyvinyl butyral/Fe₂O₃ nanofibrous membranes for effective removal of iron ions from groundwater

Abstract

Removing iron ions from groundwater to purify, it is a challenge faced by countries across the globe, which is why developing polymeric microfiltration membranes has garnered much attention. The authors of this study set out to develop nanofibrous membranes by embedding magnetic Fe2O3 nanoparticles (MNPs) into polyvinylbutyral (PVB) nanofibers via the electrospinning process. Investigation was made into the effects of the concentration of the PVB and MNPs on the morphology of the nanofibers, their magnetic properties, and capacity for filtration to remove iron ions. The fabrication and presence of well‐incorporated MNPs in the PVB nanofibers were confirmed by scanning electron microscopy and transmission electron microscopy. Depending on the concentration of the MNPs, the membranes exhibited magnetization to the extent of 45.5 emu g−1; hence, they exceeded the performance of related nanofibrous membranes in the literature. The magnetic membranes possessed significantly higher efficiency for filtration compared to their nonmagnetic analogues, revealing their potential for groundwater treatment applications.

Novel Polyvinyl Butyral/Monoacylglycerol Nanofibrous Membrane with Antifouling Activity

“…It can even help to modify the fibers’ morphology; hence, it has been applied in the formulation of various functional fibers [ 33 , 34 , 35 ]. Fabricating PVB with Fe 2 O 3 nanoparticles results in magnetic nanofibers, which have potential to be used in advanced membranes for effective removal of iron ions from groundwater [ 36 ]. The literature also reports on a PVB/CuO nanofiber-covered yarn with antibacterial properties, produced via a needle-less electrospinning system [ 37 ].…”

Stable Magnetorheological Fluids Containing Bidisperse Fillers with Compact/Mesoporous Silica Coatings

“…Characteristic peaks for iron oxides were reported in the literature beyond the investigated limit, typically at approximately 577 and 631 cm −1 in relation to Fe–O bonds [ 26 ]. Herein, the broad absorption peak at approximately 3423 cm −1 and the peak at 1606 cm −1 were assigned to the bending vibration of absorbed water and O–H stretching, respectively [ 27 ]. A peak at 1401 cm −1 was attributed to an O–H bond of ethylene glycol (served as a reaction medium), while a low intensity peak at 1069 cm −1 related to a C–C bond of the same organic compound.…”

Surface-initiated mechano-ATRP as a convenient tool for tuning of bidisperse magnetorheological suspensions toward extreme kinetic stability

“…The spectrum for the neat NPs exhibits a broad absorption band at about 3400 cm −1 , which is typical for vibrations of absorbed H 2 O and surface OH groups. 44,45 Peaks related to Fe-OH bending and Fe-O stretching mode are usually detected 45,46 at around 685 cm −1 and 586 cm −1 , respectively, which exceed the investigated limit of 700 cm −1 . Apart from these signals, iron oxide does not normally exhibit any characteristic bands.…”

“…Apart from these signals, iron oxide does not normally exhibit any characteristic bands. 44 In contrast, the spectrum for the NPs-Br particles shows a dominating peak at 1071 cm −1 that can be attributed to Si-O-Si asymmetric stretching, this being typical for organosilanes. 23 Raised absorption levels at 951 cm −1 and 804 cm −1 also indicated…”