TY - JOUR
T1 - Tuning transport in graphene oxide membrane with single-site copper (II) cations
AU - Wang, Mingzhan
AU - He, Xiang
AU - Hoenig, Eli
AU - Yan, Gangbin
AU - Peng, Guiming
AU - Shi, Fengyuan
AU - Radhakrishnan, Julia
AU - Hill, Grant
AU - Tiede, David M.
AU - Zhou, Hua
AU - Liu, Chong
N1 - Funding Information:
This work is supported by the Pritzker School of Molecular Engineering and the Advanced Materials for Energy-Water-Systems ( AMEWS ) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences . We acknowledge helpful discussions with Nicholas H. C. Lewis. We acknowledge Electron Microscopy Core of Research Resources Center in University of Illinois at Chicago for TEM characterization. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility, operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Extraordinary facility operations were supported in part by the DOE Office of Science through the National Virtual Biotechnology Laboratory, a consortium of DOE national laboratories focused on the response to COVID-19, with funding provided by the Coronavirus CARES Act .
Publisher Copyright:
© 2022 The Authors
PY - 2022/4/15
Y1 - 2022/4/15
N2 - Controlling the ion transport through graphene oxide (GO) membrane is challenging, particularly in the aqueous environment due to its strong swelling tendency. Fine-tuning the interlayer spacing and chemistry is critical to create highly selective membranes. We investigate the effect of single-site divalent cations in tuning GO membrane properties. Competitive ionic permeation test indicates that Cu2+ cations dominate the transport through the 2D channels of GO membrane over other cations (Mg2+/Ca2+/Co2+). Without/With the single-site M2+ modifications, pristine GO, Mg-GO, Ca-GO, and Cu-GO membranes show interlayer spacings of ∼13.6, 15.6, 14.5, and 12.3 Å in wet state, respectively. The Cu-GO membrane shows a two-fold decrease of NaCl (1 M) permeation rate comparing to pristine GO, Mg-GO, and Ca-GO membranes. In reverse osmosis tests using 1000 ppm NaCl and Na2SO4 as feeds, Cu-GO membrane shows rejection of ∼78% and ∼94%, respectively, which are 5%–10% higher than its counterpart membranes.
AB - Controlling the ion transport through graphene oxide (GO) membrane is challenging, particularly in the aqueous environment due to its strong swelling tendency. Fine-tuning the interlayer spacing and chemistry is critical to create highly selective membranes. We investigate the effect of single-site divalent cations in tuning GO membrane properties. Competitive ionic permeation test indicates that Cu2+ cations dominate the transport through the 2D channels of GO membrane over other cations (Mg2+/Ca2+/Co2+). Without/With the single-site M2+ modifications, pristine GO, Mg-GO, Ca-GO, and Cu-GO membranes show interlayer spacings of ∼13.6, 15.6, 14.5, and 12.3 Å in wet state, respectively. The Cu-GO membrane shows a two-fold decrease of NaCl (1 M) permeation rate comparing to pristine GO, Mg-GO, and Ca-GO membranes. In reverse osmosis tests using 1000 ppm NaCl and Na2SO4 as feeds, Cu-GO membrane shows rejection of ∼78% and ∼94%, respectively, which are 5%–10% higher than its counterpart membranes.
KW - Chemical engineering
KW - Membranes
KW - Separation science
UR - http://www.scopus.com/inward/record.url?scp=85126912898&partnerID=8YFLogxK
U2 - 10.1016/j.isci.2022.104044
DO - 10.1016/j.isci.2022.104044
M3 - Article
C2 - 35359810
AN - SCOPUS:85126912898
VL - 25
JO - iScience
JF - iScience
SN - 2589-0042
IS - 4
M1 - 104044
ER -