Effect of oxidation degree on the synthesis and adsorption property of magnetite/graphene nanocomposites

- Fe3O4/RGO nanocomposites with variant oxidation degrees of RGO were synthesized.
- Maximum oxidation results in the largest magnetization and adsorption capacity of Cu2+.
- Minimum oxidation leads to the modest magnetization but strongest adsorption of MB.
- The adsorption of Fe3O4/RGO nanocomposites follows the pseudo-second-order model.
- Only 23% of the initial capacity was lost after seven recycling use.