Facile synthesis of novel porous self-assembling hydrogen-bonding covalent organic polymers and their applications towards fluoroquinolone antibiotics adsorption
Facile synthesis of novel porous self-assembling hydrogen-bonding covalent organic polymers and their applications towards fluoroquinolone antibiotics adsorption
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DOI：
10.1039/c8ra06806b
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发表时间：
2018-09
期刊：
影响因子：
3.9
通讯作者：
Zhuoran Li;Feifan Xu;Zhi Liu;Chuanyu Qin;Hao Ren;Yangxue Li
中科院分区：
文献类型：
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作者：
Zhuoran Li;Feifan Xu;Zhi Liu;Chuanyu Qin;Hao Ren;Yangxue Li
通过一种快速、简便的方法从水溶液中吸附氟喹诺酮类抗生素，合成了一系列基于三个复合构件的多孔氢键共价有机聚合物(HCOP)。通过调整连接基的长度来调控HCOP的孔道性质，并通过引入氢键增强了HCOP的结晶度和稳定性。利用HCOPS的孔道性质和π共轭苯环以及官能团-CO-NH-和-COOH基，HCOPS能有效地去除废水中的有机污染物，并表现出良好的重复使用性能。采用动力学分析和等温线分析相结合的方法对吸附行为进行了分析。结果表明，吸附符合准二级动力学模型和朗缪尔等温吸附模型。四种HCOP的最大吸附容量按比表面积和孔径大小顺序排列。在此基础上，详细研究了多孔、静电相互作用、疏水相互作用、π-π电子-供体-受体相互作用和氢键形成等内部机理。我们计划广泛应用污染管制计划，以方便和有效地管理环境污染。
A series of porous hydrogen-bonding covalent organic polymers (HCOPs) have been synthesized based on three-composite building blocks through a quick and succinct method for fluoroquinolone antibiotics adsorption from aqueous solutions. The porous properties of the HCOPs were regulated and controlled by adjusting the lengths of linkers, and the crystallinity and stability were strengthened due to the introduction of hydrogen bonds in HCOPs. Taking advantage of the porous properties and π-conjugated phenyl rings, as well as functional –CO–NH– and –COOH groups, HCOPs removed organic pollutants from wastewater effectively and showed good reusability. The external adsorption behavior was analyzed using both kinetic analysis and isotherm analysis. The results showed that the adsorption obeys the pseudo-second order kinetic model and follows the Langmuir isotherm model. The obtained maximum adsorption capacity of the four HCOPs was arranged in sequence according to the specific surface areas and pore sizes. Furthermore, the internal mechanisms involving perforated porousness, electrostatic interaction, hydrophobic interaction, π–π electron-donor–acceptor (EDA) interaction and hydrogen bonding formation, were investigated in detail. We envisage broadly applying the HCOPs in the facile and effective management of environmental pollution.