Development of On-step Electrochemical Synthesis to Fabricate Three-dimensional N-doped Porous Graphene/magnetic Nanocomposite as novel superparamagnetic material for bio-medicinal uses

In this paper, a novel nanocomposite based on the magnetite nanoparticles and three-dimensional nitrogen doped porous graphene was fabricated. In this way, a typical galvanostatic electrosynthesis was carried out in the aqueous bath with composition of Mn chloride, ion chloride, iron nitrate and nitrogen doped porous graphene. The XRD data proved the magnetite phase of the deposited iron oxide onto nitrogen doped porous graphene. It is also observed that the fabricated sample has composed of Fe3O4 nanoparticles with Mn2+ doped cations in their crystal structures. VSM measurements indicated that the Mn doped iron oxide/ nitrogen doped porous graphene composite exhibits superparamagnetic behavior, and have saturation magnetization, remanence magnetization and coercivity of Ms=33.45 emu g–1, Mr=0.26 emu g–1 and Hci=2.41G, respectively. Compared with naked iron oxide and metal-ion doped iron oxide nanoparticles, the composite showed better superparamagnetic performance (i.e. lower Hci and Mr), which was related to well-dispersion of particles onto porous graphene and their single domain magnetic behavior.