title: Folding/aggregation of graphene oxide and its application in Cu2+ removal.
abstract: 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.
authors: Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China.
authors: Sheng-Tao
authors: ST
authors: Yang
authors: Yanli
authors: Y
authors: Chang
authors: Haifang
authors: H
authors: Wang
authors: Gangbo
authors: G
authors: Liu
authors: Sheng
authors: S
authors: Chen
authors: Yanwen
authors: Y
authors: Wang
authors: Yuanfang
authors: Y
authors: Liu
authors: Aoneng
authors: A
authors: Cao
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D012996:Solutions; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D010087:Oxides; D012996:Solutions; D014867:Water; D002244:Carbon; D003300:Copper