Ionothermal synthesis of Cu-doped Fe3O4 magnetic nanoparticles with enhanced peroxidase-like activity for organic wastewater treatment

Copper-doped Fe3O4 MNPs (Fe3−xCuxO4, x: 0.06–0.23, ca. 14 nm) with significantly copper-enriched surface and enhanced peroxidase-like activity were successfully prepared by oxidative precipitation-combined ionothermal synthesis and exploited to efficiently degrade recalcitrant organic pollutants.