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One-pot synthesis of hyper-cross-linked polymers chemically modified with pyrrole, furan, and thiophene for phenol adsorption from aqueous solution
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2018-12-06 , DOI: 10.1016/j.jcis.2018.12.021
Xiaomei Wang , Han Ou , Jianhan Huang

Pyrrole, furan, and thiophene modified hyper-cross-linked polymers (HCPs) were prepared in one-pot method by two successive Friedel-Crafts reactions, and they were assessed by phenol adsorption from aqueous solution. The results indicated that the three chemically modified polymers had lower Brunauer-Emmett-Teller surface area and pore volume than the common HCPs, while the phenol adsorption on the pyrrole and thiophene modified polymers was relatively enhanced due to the introduction of the heteroatoms on the surface. Notably, the enthalpy changes of HCP-Py, HCP-Fu, and HCP-Th were greater than the HCPs, and the introduced heteroatoms provide greater interaction with phenol through dipole-dipole interaction. More importantly, the kinetic adsorption revealed that the required equilibrium time on the three chemically modified polymers (about 45 min) was shorter than the HCPs (about 75 min), and the pseudo-second-order rate equation described the kinetic data very well. The micropore diffusion model was suitable for characterizing the adsorption on the HCPs, but it could not account for the kinetic data on the chemically modified polymers.



中文翻译:

一锅合成由吡咯,呋喃和噻吩化学改性的超交联聚合物,用于从水溶液中吸附苯酚

一锅法通过两次连续的Friedel-Crafts反应制备吡咯,呋喃和噻吩改性的超交联聚合物(HCP),并通过从水溶液中吸附酚进行评估。结果表明,三种化学改性的聚合物具有比普通HCP更低的Brunauer-Emmett-Teller表面积和孔体积,而由于表面引入杂原子,苯酚在吡咯和噻吩改性的聚合物上的吸附相对增强。 。值得注意的是,HCP-Py,HCP-Fu和HCP-Th的焓变大于HCP,并且引入的杂原子通过偶极-偶极相互作用提供了与苯酚的更大相互作用。更重要的是,动力学吸附表明,在三种化学改性的聚合物上所需的平衡时间(约45分钟)比六氯苯酚(约75分钟)短,并且拟二级速率方程很好地描述了动力学数据。微孔扩散模型适合表征HCP的吸附,但不能解释化学改性聚合物的动力学数据。

更新日期:2018-12-06
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