Narrow Results

More and more scholars were committed to loading the iron oxide nanoparticles on the graphene. Shown in the studies, there were many nucleation sites on the graphene for the Fe₃O₄ particles, meanwhile, the distance between the graphene was lengthened due to the magnetic Fe₃O₄ particles, and the reunion of the graphene could be avoided. The excellent performance of the two materials was combined perfectly in this way. To facilitate the researchers work better in the future, in this paper, the synthesis of Fe₃O₄/graphene were reviewed from its applications such as waste water treatment, magnetic targeting drugs, biosensor, and the anode materials for lithium-ion battery. Simultaneously, the prospects of the composite material were discussed.

Fe₃O₄-graphene oxide composite nanocrystals with diameter of about 20 nm were prepared at 200°C for 12 h in a closed vessel containing an appropriate amount of ferrocene powder, grapheme oxide and distilled water. Magnetic measurements show 38.18 emu/g of saturation magnetization (Ms) of a typical sample, which is lower than 66.77 emu/g of the corresponding metal Fe₃O₄ bulk material. This is attributed to the considerable mass of the graphene oxide and nature of the magnetic nanocrystals.

A novel kind of magnetically photocatalyst Fe₃O₄@SiO₂@BiOBr was synthesized by hydrothermal method. Fe₃O₄ nanoparticles were firstly synthesized, and then got coated by SiO₂. The as-prepared product was coated by BiOBr finally. The character of Fe₃O₄@SiO₂@BiOBr was fully analyzed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and reflectance spectroscopy (DRS). The as-prepared Fe₃O₄@SiO₂@BiOBr show good photocatalytic performance in degradation of rhodamine B under visible light irradiation. In addition, Fe₃O₄ performs good magnet, which plays an important role in Fe₃O₄@SiO₂@BiOBr samples, moreover, its nontoxicity, easy and cheap to get also give it many priority.