【摘要】 以氧化石墨烯为载体,以Fe³⁺和Fe²⁺发生化学共沉淀形成的具有磁性的铁氧化物纳米粒子为磁性源,采用化学方法制备了Fe₃O₄/GO二元复合材料,并利用TEM、XRD、FTIR等手段对Fe₃O₄/GO二元复合材料进行了物理表征,结果表明成功合成了磁性氧化石墨烯。研究了此二元复合材料的吸附动力学、吸附等温线及初始pH值对吸附的影响,考察了Fe₃O₄/GO对水中Pb²⁺的去除效果。结果表明,pH在7.0时复合材料的吸附效果最好,吸附时间在210 min左右时达到吸附平衡,最大吸附量为135.7 mg·g^-1。更多还原

【Abstract】 Fe₃O₄/GO binary composite materials were prepared by combination of graphene oxide as a carrier material and iron oxide nanoparticles as a magnetic source,which was obtained by chemical precipitation of Fe³⁺and Fe²⁺. TEM,XRD and FTIR were adopted for the characterization of binary composites,Fe₃O₄/GO. The results showed that the magnetic graphene oxide was successfully synthesized.The adsorption kinetics,adsorption isotherm and the influence of initial pH on the adsorption properties of the composite materials were studied. The effect of Fe₃O₄/GO on the removal of Pb²⁺in water was investigated. Experimental results showed that the adsorption was optimized when pH was 7. 0. The maximum adsorption capacity( Qmax135. 7mg·g^-1) was obtained when the adsorption equilibrium reached at about 210 min. Therefore,magnetic graphene oxide composites have a wide range of applications in recovery and handling of the heavy metal ions.更多还原