Li Zhuoran, Xu Feifan, Liu Zhi, Qin Chuanyu, Ren Hao, Li Yangxue
Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University 2519 Jiefang Road Changchun 130021 P. R. China
School of Municipal and Environmental Engineering, Jilin Jianzhu University 5088 Xincheng Street Changchun 130118 P. R. China.
RSC Adv. 2018 Oct 1;8(58):33516-33522. doi: 10.1039/c8ra06806b. eCollection 2018 Sep 24.
A series of porous hydrogen-bonding covalent organic polymers (HOPs) 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 HOPs 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 HOPs. Taking advantage of the porous properties and π-conjugated phenyl rings, as well as functional -CO-NH- and -COOH groups, HOPs 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 HOPs 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 HOPs in the facile and effective management of environmental pollution.
基于三复合结构单元，通过一种快速简洁的方法合成了一系列用于从水溶液中吸附氟喹诺酮类抗生素的多孔氢键共价有机聚合物（HOPs）。通过调节连接体的长度来调控HOPs的多孔性能，并且由于HOPs中引入了氢键，其结晶度和稳定性得到增强。利用多孔性能、π共轭苯环以及官能团-CO-NH-和-COOH，HOPs能有效去除废水中的有机污染物，并表现出良好的可重复使用性。采用动力学分析和等温线分析对外部吸附行为进行了分析。结果表明，吸附遵循准二级动力学模型并符合朗缪尔等温线模型。根据比表面积和孔径大小，所获得的四种HOPs的最大吸附容量依次排列。此外，还详细研究了包括穿孔多孔性、静电相互作用、疏水相互作用、π-π电子供体-受体（EDA）相互作用和氢键形成在内的内部机制。我们设想将HOPs广泛应用于环境污染的简便有效治理。
