Three-dimensional magnetic graphene oxide foam/Fe3O4 nanocomposite as an efficient absorbent for Cr(VI) removal

By Yinlin Lei, Fei Chen, Yunjie Luo, Longjiao Zhang. Journal of Materials Science, 2014

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An Overview of Nanomaterials for Water and Wastewater Treatment (2016, methodology): “Therefore, they have been successfully used as sorbent materials in the removal of various heavy metals from water systems [94–96].”
Graphene oxides for removal of heavy and precious metals from wastewater (2016, background): “Aqueous solutions containing copper ions have applications in the fields of mechanical manufacturing industry, electroplating, light industry and Table 2 Adsorption capacities of adsorbents used in Cr(VI) adsorption [2, 3, 56, 57, 59, 77, 78, 83, 84, 95, 105, 112, 134]”
Three-dimensional graphene networks: synthesis, properties and applications (2015, background): “Lei et al. [90] synthesized 3D GOF/Fe 3 O 4 nanocomposites for the removal of Cr(IV), and the nanocomposites exhibited a very large surface area of 574.2 m 2 /g and a maximum absorption capacity of 258.6 mg/g. Zhang’s group explored the effect of 3D GOFs as an absorbent to remove heavy metal ions…”
Carbon nanotubes, graphene, and their derivatives for heavy metal removal (2018, background): “[130] developed a novel three-dimensional (3D) GO foam/Fe3O4 nanocomposite (GOF/Fe3O4) and evaluated its adsorption performance for Cr(VI).”
Facile synthesis of polypyrrole decorated reduced graphene oxide–Fe3O4 magnetic composites and its application for the Cr(VI) removal (2015, background): “The presence of Cr 2p3/2 proves the existence of the oxidation state of Cr(III) [46].”