School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, PR China.
School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, PR China.
J Hazard Mater. 2020 Jul 5;393:122353. doi: 10.1016/j.jhazmat.2020.122353. Epub 2020 Feb 19.
The magnetic covalent organic framework with β-ketoenamine linkage (FeO@COF(TpPa-1)) was fabricated by the hydrothermal method. The obtained FeO@TpPa-1 integrated four advantages, namely easy preparation, high stability, excellent adsorption performance (485.2 m/g) and good recoverability (19.5 emu/g), which enabled it an ideal sorbent for wastewater treatment. FeO@TpPa-1 exhibited excellent adsorption capacities for Cr (VI) (245.45 mg/g) and bisphenol A (1220.97 mg/g). The adsorption kinetics and isotherms were in alignment to the pseudo-second-order and Langmuir model, respectively. After five times cycles, the adsorption capacity of FeO@TpPa-1 still retained at a high level. According to Materials Studio simulation and XPS analysis, the adsorption mechanism was attributed to the presence of the homogeneously distributed imine and carbonyl functional groups in the framework of TpPa-1, allowing them to serve as platforms for anchoring heavy metals and organic pollutants. Besides, the hydrophobic skeleton structures of TpPa-1 endowed them good adsorption performance towards organic pollutants via hydrogen -bonding (NHOHO) and π-π interaction. Therefore, the recyclable FeO@TpPa-1 showed a broad application prospects in environmental remediation.
通过水热法制备了具有β-酮亚胺键的磁性共价有机框架（FeO@COF（TpPa-1））。所得到的 FeO@TpPa-1 集成了四个优点，即易于制备、高稳定性、优异的吸附性能（485.2 m/g）和良好的可回收性（19.5 emu/g），使其成为废水处理的理想吸附剂。FeO@TpPa-1 对 Cr（VI）（245.45 mg/g）和双酚 A（1220.97 mg/g）具有优异的吸附容量。吸附动力学和等温线分别符合准二级和朗缪尔模型。经过五次循环后，FeO@TpPa-1 的吸附容量仍保持在较高水平。根据 Materials Studio 模拟和 XPS 分析，吸附机制归因于 TpPa-1 骨架中均匀分布的亚胺和羰基官能团，它们可以作为锚定重金属和有机污染物的平台。此外，TpPa-1 的疏水性骨架结构通过氢键（NHOHO）和π-π 相互作用赋予其对有机污染物的良好吸附性能。因此，可回收的 FeO@TpPa-1 在环境修复中具有广阔的应用前景。
