Faculty of Chemistry, Urmia University, Urmia 5756151818, Iran.
Faculty of Chemistry, Urmia University, Urmia 5756151818, Iran.
Carbohydr Polym. 2019 May 1;211:298-307. doi: 10.1016/j.carbpol.2019.01.113. Epub 2019 Feb 1.
In this paper, the fabrication of magnetically separable organic-inorganic hybrid nanoadsorbent via the functionalization of FeO@SiO@Cellulose with glycidyl methacrylate (GMA) and then ethylenediamine (EDA) was studied. The obtained nanocomposite system was characterized using FT-IR, XRD, SEM, EDX and VSM analyses. The EDA-functionalized magnetic cellulose exhibited a perfect capability towards removal of Cu as well as Pb, Cd, Zn and Ni ions from the aqueous solutions. In addition, the influence of pH, contact time and initial concentration of Cu were also investigated on capacity of the new designed cellulose absorbent. The examinations resulted that the adsorption process of Cu is obeyed from the pseudo-second order kinetic model and the Langmuir isotherm. The maximum adsorption capacity of Cu ions on the nanomagnetic cellulose was 81.67 mg/g. The magnetic cellulose after removal of Cu ions was successfully applied as an efficient catalyst system for reduction of 4-nitrophenol to 4-aminophenol with excess amounts of NaBH in water.
本文通过在 FeO@SiO@Cellulose 上接枝甲基丙烯酸缩水甘油酯（GMA）和乙二胺（EDA），制备了可分离的磁性有机-无机杂化纳米吸附剂。采用 FT-IR、XRD、SEM、EDX 和 VSM 分析对所得纳米复合体系进行了表征。EDA 功能化磁性纤维素对水溶液中的 Cu 以及 Pb、Cd、Zn 和 Ni 离子具有良好的去除性能。此外，还研究了 pH 值、接触时间和 Cu 初始浓度对新型纤维素吸附剂容量的影响。研究结果表明，Cu 的吸附过程遵循准二级动力学模型和 Langmuir 等温线。Cu 离子在纳米磁性纤维素上的最大吸附容量为 81.67mg/g。去除 Cu 离子后的磁性纤维素可成功用作高效催化剂体系，在水中用过量的 NaBH 还原 4-硝基苯酚为 4-氨基酚。
