Preparation and electrochemical property of Fe3O4/MWCNT nanocomposite

Highlights: • The nanomaterials were synthesized by chemical deposition & hydrothermal method. • The composite has a favorable promotion for the electrochemical response of H₂O₂. • This process improved the redox current of H₂O₂. Ferroferric oxide (Fe₃O₄)/functionalized multi-walled carbon nanotube (f-MWCNT) nanomaterials were synthesized by chemical deposition & hydrothermal method. Fe₃O₄/f-MWCNT composites possess the same ferrimagnetism as pure Fe₃O₄, and the composites will present certain orientation in magnetism. The saturation magnetization (M_s) is about 48.84 emu g⁻¹ and the coercivity (Hc) is 19.19 Oe. The electrochemical analysis displays that the glassy carbon electrode coated with Fe₃O₄/f-MWCNT composite has a favorable promotion for the electrochemical response of H₂O₂. This process not only widely improved the redox current of H₂O₂, but also reduced the overpotential of redox process.