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- W1162019710 abstract "Graphene oxides (GOs) have attracted intense multidisciplinary study because of their special physicochemical properties and their possible applications. The large amount of oxygen-containing functional groups on GO surfaces makes it possible to form strong surface complexes with metal ions. Herein, the GOs are synthesized by modified Hummers method and characterized by SEM, TEM, FTIR, XRD, XPS and Raman spectroscopy techniques in detail. The results show that large amount of oxygen-containing functional groups is generated on GO surfaces during the synthesis process. The GOs are applied as adsorbents to remove Pb(II) ions from aqueous solutions and the sorption of Pb(II) is strongly dependent on pH and the sorption of Pb(II) is mainly attributed to the formation of strong surface complexes. Comparing the sorption capacities of Pb(II) on different materials, the GOs have the highest sorption capacity among todays' materials. The results of far infrared spectroscopy analysis and the DFT calculation also indicate that the binding of Pb(II) on GOs is mainly attributed to the COOH groups rather than other functional groups. The GOs may be suitable materials for the preconcentration of heavy metal ions from large volume of aqueous solutions in the near future if GOs could be synthesized in large scale at low price." @default.
- W1162019710 created "2016-06-24" @default.
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- W1162019710 date "2015-11-01" @default.
- W1162019710 modified "2023-10-08" @default.
- W1162019710 title "Application of graphene oxides for the removal of Pb(II) ions from aqueous solutions: Experimental and DFT calculation" @default.
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- W1162019710 doi "https://doi.org/10.1016/j.molliq.2015.08.020" @default.
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