State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
Anal Chim Acta. 2019 Apr 25;1054:47-58. doi: 10.1016/j.aca.2018.12.037. Epub 2018 Dec 21.
A novel ionic liquid (IL) modified magnetic nanocomposite (mag-MoS-RGO), which was composed of molybdenum disulfide (MoS) and reduced graphene oxide (RGO), was firstly synthesized and characterized (mag-MoS-RGO-IL). Compared with mag-MoS-RGO, the mag-MoS-RGO-IL exhibited the higher adsorption capacity of 143.9 mg/g for methylene blue (MB) under optimum conditions. Experimental results were imitated by adsorption isotherms and kinetic models, revealing a monolayer adsorption on the homogeneous surface governed by chemisorption. The removal rate was maintained 78% after 5 cycles of regeneration, indicating its good reutilization. Methodological study suggested that the method possessed excellent repeatability, precision and stability. The recoveries from the real samples were in the range of 87.0-98.8% with relative standard deviation of ≤5.2%. Benefiting from composite structure and magnetic FeO, the stable magnetic adsorbent can be quickly separated from aqueous solution. All of above proves that the prepared mag-MoS-RGO-IL has great application potential in dye separation.
首次合成并表征了一种新型离子液体（IL）修饰的磁性纳米复合材料（mag-MoS-RGO），由二硫化钼（MoS）和还原氧化石墨烯（RGO）组成（mag-MoS-RGO-IL）。在最佳条件下，与 mag-MoS-RGO 相比，mag-MoS-RGO-IL 对亚甲基蓝（MB）的吸附容量高达 143.9mg/g。吸附等温线和动力学模型的实验结果表明，这是一个由化学吸附控制的均匀表面单层吸附。经过 5 次再生循环，去除率仍保持在 78%，表明其具有良好的可重复利用性。方法学研究表明，该方法具有良好的重现性、精密度和稳定性。从实际样品中的回收率在 87.0-98.8%之间，相对标准偏差≤5.2%。得益于复合结构和磁性 FeO，稳定的磁性吸附剂可以从水溶液中快速分离。所有这些都证明了制备的 mag-MoS-RGO-IL 在染料分离方面具有巨大的应用潜力。
