Fe3O4@碳/氧化石墨烯复合材料制备及染料吸附性能

摘要

Fe3O4@carbon/graphene oxide (Fe3O4@C/GO)composites were synthesized by hydrothermal method and characterized by X-ray diffraction, transmission electron microscopy, vibrating sample magnetometer. And their dye adsorbing properties were investigated. The results indicated that the Fe3O4 nanoparticles were uniformly anchored on GO sheets. The saturated adsorption capacities towards Rhodamine B (RhB) of the composites increased with the increase of GO content, initial RhB concentration and adsorbing temperature. And the higher GO content in the composite was, the quicker the absorbing rate was. The saturated adsorption capacity of the composite reached a maximum value when the pH value was 7. For the composite prepared at 0.8 of the mass ratio of GO to Fe3O4, the saturated adsorption capacity reached 303.4mg/g at 1000mg/L of initial RhB concentration.%采用水热法合成了四氧化三铁@碳/氧化石墨烯(Fe3O4@C/GO)复合材料,并利用XRD、TEM、VSM等对其结构与性质进行了表征,进一步研究了其对水中染料的吸附性能.研究结果表明,Fe3O4比较均匀地分散在GO上；在实验范围内,随着GO用量、罗丹明B初始浓度或吸附温度的提高,Fe3O4@C/GO复合材料对罗丹明B染料的饱和吸附量均相应地增加；而且高GO用量条件下所制备的复合材料的吸附速率更快；随着pH值在2~11范围内增加,复合材料的饱和吸附量先增大后降低,pH值为7时达到最大值.对于GO和Fe3O4质量比为0.8的条件下所制备的Fe3O4@C/GO复合材料,当罗丹明B初始浓度为1000mg/L,其饱和吸附量可达到303.4mg/g.