▎ 摘　　要

A novel solvothermal method for the deposition of Fe3O4 nanoparticles on the surface of graphene oxide (GO) with different ratios was developed. Synthesized Fe3O4/GO nanocomposites were characterized using a transmission electron microscope, X-ray diffraction analyzer, X-ray photoelectron spectroscope, vibrating sample magnetometer, and nitrogen adsorption/desorption test. Results of characterization showed that Fe3O4 nanoparticles were homogeneously deposited onto the surface of GO, and the diameters of Fe3O4 nanoparticles of 1:1 Fe3O4/GO nanocomposites and 2:1 Fe3O4/GO nanocomposites were similar to 4 and similar to 6 nm, respectively. Saturation magnetizations reached 9.58 and 15.14 emu/g for 1:1 Fe3O4/GO and 2:1 Fe3O4/GO, respectively. Adsorption experiments were carried out subsequently to investigate the adsorption kinetics and isotherms of 17 beta-estradiol (E-2) and Pb(II) onto Fe3O4/GO. In addition, effects of pH on the adsorption of E-2 and Pb(II) were also studied. Most interestingly, synergistic adsorption between E-2 and Pb(II) was found when different ratios of E-2 and Pb(II) were used. In the mixture, adsorption capacity of 10 mg/L of Pb(II) was increased from 14.8 to 20.8 mg/g with the increasing concentration of E-2. The possible reason for explanation was discussed.