Borate Inorganic Crosslinked Durable Graphene Oxide Membrane Preparation and Membrane Fouling Control.

Author(s) Han, J.L.; Haider, M.Rizwan; Liu, M.J.; Wang, H.C.; Jiang, W.L.; Ding, Y.C.; Hou, Y.N.; Cheng, H.Y.; Xia, X.; Wang, A.J.
Journal Environ Sci Technol
Date Published 2018 Dec 28

Graphene oxide (GO) membranes have the potential to be next-generation membranes. However, the GO layer easily swell in water and risks shedding during the long-term filtration. Organic GO interlayer organic crosslinking agent was not resistant to oxidation, which limits the application scope of GO membrane. In this study, an inorganic crosslinked GO membrane was prepared via the reaction of sodium tetraborate and GO hydroxyl groups, and a -B-O-C- crosslinking bond was detected by X-ray photoelectron spectroscopy (XPS). Additionally, a new atomic force microscope scratch method to evaluate the crosslinking force of a nanoscale GO layer was proposed. It showed that the critical destructive load of the inorganic crosslinked GO membrane increased from 8 nN to 80 nN, which was a 10-fold increase from that of the nonlinked sample. During the NaOH/sodium dodecyl sulfate (SDS) destructive wash tests, morphology, flux and retention rate of inorganic crosslinked GO remained stable while the comparative membranes showed significant destruction. At the same time, based on the better oxidation resistance, organic membrane fouling was effectively controlled by the introduction of trace ·OH radicals. This study provides a new perspective for GO membrane preparation, interlayer crosslinking force testing and membrane fouling control.

DOI 10.1021/acs.est.8b04194
ISSN 1520-5851
Citation Environ Sci Technol. 2018.

Related Applications, Forms & Industries