Folding/aggregation of graphene oxide and its application in Cu2+ removal.
Graphene oxide (GO) can be aggregated by Cu(2+) in aqueous solution with a huge Cu(2+) absorption capacity. The Cu(2+) causes GO sheets to be folded and also to form large aggregates that were characterized by confocal microscopy and atomic force microscopy. The folding/aggregation is most likely triggered by the coordination between GO and Cu(2+). The equilibrium Cu(2+) concentrations and equilibrium absorption capacity of GO were measured to estimate the maximum absorption capacity of GO for Cu(2+) and the absorption model. GO has a huge absorption capacity for Cu(2+), which is around 10 times of that of active carbon. Representative results are presented and the implication to Cu(2+) removal is discussed.
Yang
Sheng-Tao
ST
Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China.
Chang
Yanli
Y
Wang
Haifang
H
Liu
Gangbo
G
Chen
Sheng
S
Wang
Yanwen
Y
Liu
Yuanfang
Y
Cao
Aoneng
A
D002244:Carbon / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D012996:Solutions; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D010087:Oxides; D012996:Solutions; D014867:Water; D002244:Carbon; D003300:Copper