Membrane of Functionalized Reduced Graphene Oxide Nanoplates with Angstrom-Level Channels.
Membranes with atomic level pores or constrictions are valuable for separation and catalysis. We report a graphene-based membrane with an interlayer spacing of 3.7 angstrom (Å). When graphene oxide nanoplates are functionalized and then reduced, the laminated reduced graphene oxide (rGO) nanoplates or functionalized rGO membrane is little affected by an intercalated fluid, and the interlayer spacing of 3.7 Å increases only to 4.4 Å in wetted state, in contrast to the graphene oxide (GO) membrane whose interlayer spacing increases from 9 Å to 13 Å in wetted state. When applied to ion separation, this membrane reduced the permeation rate of small ions such as K(+) and Na(+) by three orders of magnitude compared to the GO membrane.
BK21 Plus Program in Chemical Engineering, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-742, Republic of Korea.|School of Mechanical and Aerospace Engineering, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-742, Republic of Korea.
Byeongho
B
Lee
School of Mechanical and Aerospace Engineering, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-742, Republic of Korea.
Kunzhou
K
Li
School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Processes(ICP), Seoul National University(SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea.
Hong Sik
HS
Yoon
School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Processes(ICP), Seoul National University(SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea.|Asian Institute for Energy, Environment &Sustainability (AIEES), Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea.
Jeyong
J
Yoon
Department of Chemistry, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-747, Republic of Korea.
Yeongbong
Y
Mok
Department of Chemistry, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-747, Republic of Korea.
Yan
Y
Lee
School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Processes(ICP), Seoul National University(SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea.
Hong H
HH
Lee
School of Mechanical and Aerospace Engineering, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-742, Republic of Korea.
Yong Hyup
YH
Kim