Synthesis of Fe_3O_4 with high water dispersion modified by citrate salt

Water dispersion of magnetite(Fe3O4)affects its applications in biomedicine.Highly Water-Dispersible Fe3O4 has been prepared by hydrothermal method using FeSO4,EG and trisodium citrate.The phase,morphology,size and surface functional groups were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM)and Fourier transform infrared spectroscopy(FT-IR).The effects of trisodium citrate on morphology,size,crystalline and water dispersion of Fe3O4 were studied.Compared with Fe3O4 without using trisodium citrate,Fe3O4 modified by trisodium citrate exhibited better dispersion activity in water.