One-step synthesis of Co-Ni ferrite/graphene nanocomposites with controllable magnetic and electrical properties

摘要

Co_(1-x)Ni_xFe_2O_4/graphene nanocomposites were synthesized through a one-step solvothermal method. The as-synthesized products were characterized by X-ray powder diffraction, field emission scanning microscopy, transmission electron microscope, and high-resolution transmission electron microscope. The results show that the Co_(1-x)Ni_xFe_2O_4 nanoparticles are uniformly dispersed on graphene sheets. The dependence of structure, magnetic and electrical properties of Co_(1-x)Ni_xFe_2O_4/graphene nanocomposites on the Ni~(2+) concentration and the graphene content were also studied. The saturation magnetization and electrical conductivity of the as-prepared products reached 51.82 emu/g and 1.00 × 10~2 S/m, respectively.