【摘要】 以氧化石墨烯（GO）和纳米Fe₃O₄为原料,制备磁性石墨烯气凝胶（Fe₃O₄/RGO）,通过场发射扫描电镜、X射线衍射仪、傅里叶红外光谱仪对Fe₃O₄/RGO进行表征,研究了Fe₃O₄/RGO对Pb（Ⅱ）、Cu（Ⅱ）、Cd（Ⅱ）的吸附特性,并使用等温吸附模型、吸附动力学模型、吸附热力学模型对吸附机理进行分析。结果表明,纳米Fe₃O₄成功负载在GO气凝胶表面,并能在外加磁场作用下实现快速磁分离。Fe₃O₄/RGO对重金属离子的吸附符合Langmuir等温吸附模型和准2级吸附动力学模型,且反应为是吸热过程,能自发进行。Fe₃O₄/RGO在25℃、p H为6时的吸附容量分别为58.48、314.5、56.12 mg/g,Fe₃O₄/RGO对重金属吸附排序为Cu（Ⅱ）>Pb（Ⅱ）>Cd（Ⅱ）。更多还原

【Abstract】 Magnetic graphene oxide aerogel（Fe₃O₄/RGO） was prepared from graphene oxide（GO） and Fe₃O₄ nanoparticles and characterized by field emission scanning electron microscopy, X-ray diffractometer and Fourier infrared spectrometer. The adsorption performance of Fe₃O₄/RGO for Pb（Ⅱ）,Cu（Ⅱ） and Cd（Ⅱ） was researched, and isothermal adsorption model, adsorption kinetic model and adsorption thermodynamics model was used to analyze adsorption mechanism. The results showed that, Fe₃O₄ nanoparticle was successfully loaded on the surface of GO aerogel, and the composite could implement magnetic separation under an external magnetic field. The adsorption of Fe₃O₄/RGO for heavy metal ion was fitted with Langmuir isothermal adsorption model and quasi-second-order adsorption kinetic model, and the reaction was a spontaneous endothermic process. The adsorption capacity of Fe₃O₄/RGO for Pb（Ⅱ）, Cu（Ⅱ） and Cd（Ⅱ） was 58.48 mg/g, 314.5 mg/g and 56.12 mg/g respectively, the order from largest to smallest were Cu（Ⅱ）, Pb（Ⅱ） and Cd（Ⅱ）.更多还原