Chitosan-sodium alginate multilayer membrane developed by Fe0@WO3 nanoparticles: Photocatalytic removal of hexavalent chromium. (15th October 2018)

• Record Type: Journal Article
• Authors: Kazemi, Maryamossadat; Jahanshahi, Mohsen; Peyravi, Majid
• Is Part Of: Carbohydrate polymers. Volume 198(2018)
• Page Start: 164
• Page End: 174
• Publication Date: 2018-10-15
• Subjects: Fe0-doped WO3 -- Cr(VI) ions removal -- Enhanced ultrafiltration membrane -- Layer by layer; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2018.06.069
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: The synthesized Fe 0 @WO3 nanoparticles have shown excellent photocatalytic activity under visible-light irradiation. The UF membrane was modified by chitosan/alginate bilayers and Fe 0 @WO3 nanoparticle via layer by layer technique. The modified PES membrane was significantly showed the Cr(VI) removal efficiency. Abstract: The WO3 nanostructures were modified by doping with iron and then the polyethersulfone (PES) ultrafiltration (UF) membrane was developed using prepared Fe 0 -doped WO3 photocatalytic nanoparticles via layer by layer technology. According to UV–vis diffuse reflectance spectroscopy (UV–vis/DRS) characterization, the photocatalytic activity of WO3 nanoparticles could be improved by doping with Fe impurity. The prepared membranes were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and contact angle analyzer. The novel photocatalytic membranes were used in removal of hexavalent chromium (Cr(VI)) ions in batch mode as well as filtration system. The novel photocatalytic membranes have shown significant Cr(VI) ions removal under visible-light illumination. By depositing the (CHI-ALG)3.5 bilayers on the PES/UF membrane surface, the Cr(VI) rejection for 5, 25 and 50 mg/l feed concentration were enhanced from 21%, 17% and 9% for neat PES to 56.3%, 41.6% and 30.1% for PES/ (CHI-ALG)3.5 membrane and 99.2%, 92.1% and 78.1% for PES/ (CHI-ALG)3.5 / Fe 0 @WO3 membrane, respectively.