Pd/Fe3O4-PEI-RGO was synthesized by dispersion of Pd NPs and Fe3O4 NPs on GO sheets.
Pd/Fe3O4-PEI-RGO provides a sensing platform for the colorimetric detection of H2O2.
Pd/Fe3O4-PEI-RGO has the advantages of facile preservation and rapid separation.
Pd/Fe3O4-PEI-RGO has the enhanced peroxidase catalytic activity.