Synthesis of a Thin-Layer MnO₂ Nanosheet-Coated Fe₃O₄ Nanocomposite as a Magnetically Separable Photocatalyst

Abstract

A facile hydrothermal method combined with a mild ultrasonic means has been developed for the fabrication of a magnetically recyclable thin-layer MnO2 nanosheet-coated Fe3O4 nanocomposite. The photocatalytic studies suggest that the MnO2/Fe3O4 nanocomposite shows excellent photocatalytic efficiency and stability simultaneously for the degradation of methylene blue under UV-vis light irradiation. Moreover, its good acid resistance and stable recyclability are very important for its future practical application as a photocatalyst. Magnetic measurements verify that the MnO2/Fe3O4 nanocomposite possesses a ferromagnetic nature, which can be effectively separated for reuse by simply applying an external magnetic field after the photocatalytic reaction. This novel composite material may have potential applications in water treatment, degradation of dye pollutants, and environmental cleaning.

Magnetic Photocatalyst BiVO4/Mn-Zn ferrite/Reduced Graphene Oxide: Synthesis Strategy and Its Highly Photocatalytic Activity

“…Magnetic compounds, such as Fe 3 O 4 and ZnFe 2 O 4 , have been extensively studied, due to their interesting properties, including photoactivity and stability. There are synthesis strategies and property studies for magnetic composite catalysts [4,5,6,7,8]. However, the recovery rate and the photocatalytic activity of these composites do not meet the need of industrial applications yet.…”

Facile Synthesis of Magnetic Photocatalyst Ag/BiVO4/Mn1−xZnxFe2O4 and Its Highly Visible-Light-Driven Photocatalytic Activity

“…These photocatalysts possess superior physicochemical and magneto-optical properties [1,2,3,4]. Non-toxic bismuth vanadate (BiVO 4 ), with good light absorption and high ionic conductivity [5,6,7,8], has attracted strong interest from scientists.…”

Corallite-like Magnetic Fe3O4@MnO2@Pt Nanocomposites as Multiple Signal Amplifiers for the Detection of Carcinoembryonic Antigen

“…According to the method provided by Zhang et al, 31 magnet and washed three times with deionized water. Finally, Fe 3 O 4 @ MnO 2 NPs were obtained after being dried at 50°C for 12 h.…”