In this study, we successfully prepared two magnetic graphene oxide composites, specifically (mGO_@ILs(1)-βCD and mGO_@ILs(2)-βCD), with different ionic liquid functional group substitution contents on the β-cyclodextrin (β-CD). Structural characterization of the composite material was performed using Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, specific surface area and pore volume measurements. Comparison of the adsorption performance of the two materials for anionic dyes (lemon yellow (LY), sunset yellow (SY), and ponceau 4R (P4R)) in simulated wastewater. Effect of initial pH value, contact time were studied and discussed in terms of affinity and adsorption efficiency. The adsorption of the anionic azo dye by two adsorbent followed Langmuir adsorption isotherm models and pseudo-second-order kinetics. Noticeably, the maximum adsorption capacity based on the Langmuir model showed that mGO_@ILs(2)-βCD was better than mGO_@ILs(1)-βCD. Additionally, the adsorbent maintains excellent adsorption capacity after five cycles of adsorption-desorption and has remarkable selective separability. The results showed that the high-density substitution content of the ionic liquid functional groups on β-cyclodextrin in mGO_@ILs(2)-βCD is helpful to improve the adsorption capacity and efficiency.

在这项研究中，我们成功地制备了两种磁性氧化石墨烯复合材料，特别是（mGO _@ ILs（1）-βCD和mGO _@ILs（2）-βCD），在β-环糊精（β-CD）上具有不同的离子液体官能团取代含量。使用傅里叶变换红外光谱，X射线衍射，场发射扫描电子显微镜，比表面积和孔体积测量对复合材料进行结构表征。比较两种材料在模拟废水中对阴离子染料（柠檬黄（LY），日落黄（SY）和丽春红4R（P4R））的吸附性能。研究了初始pH值，接触时间对亲和力和吸附效率的影响。两种吸附剂对阴离子偶氮染料的吸附遵循Langmuir吸附等温线模型和拟二级动力学。值得注意的是，基于Langmuir模型的最大吸附容量表明mGO_@离子液体（2）-βCD比MgO的更好_@离子液体（1）-βCD。另外，该吸附剂在五个吸附-解吸循环后仍保持优异的吸附容量，并具有显着的选择性可分离性。结果表明，mGO _@ ILs（2）-βCD中β-环糊精上离子液体官能团的高密度取代含量有助于提高吸附能力和效率。