Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
Key Laboratory for Natural Active Pharmaceutical Constituents Research in Universities of Shandong Province, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
Molecules. 2023 Apr 27;28(9):3752. doi: 10.3390/molecules28093752.
To efficiently eliminate highly polar organic pollutants from water has always been a difficult issue, especially in the case of ultralow concentrations. Herein, we present the facile synthesis of quinolinecarboxylic acid-linked COF (QCA-COF) via the Doebner multicomponent reaction, possessing multifunction, high specific surface area, robust physicochemical stability, and excellent crystallinity. The marked feature lies in the quinolinyl and carboxyl functions incorporated simultaneously to QCA-COF in one step. The major -orientation of carboxyl arms in QCA-COF was speculated by powder X-ray diffraction and total energy analysis. QCA-COF demonstrates excellent adsorption capacity for water-soluble organic pollutants such as rhodamine B (255.7 mg/g), methylene blue (306.1 mg/g), gentamycin (338.1 mg/g), and 2,4-dichlorophenoxyacetic acid (294.1 mg/g) in water. The kinetic adsorptions fit the pseudo-second order model and their adsorption isotherms are Langmuir model. Remarkably, QCA-COF can capture the above four water-soluble organic pollutants from real water samples at level with higher than 95% removal efficiencies and excellent recycling performance.
高效去除水中的高极性有机污染物一直是一个难题，尤其是在超低浓度的情况下。在此，我们通过多组分反应简便地合成了喹啉羧酸连接的 COF（QCA-COF），其具有多功能性、高比表面积、强的物理化学稳定性和优异的结晶度。显著的特点是喹啉基和羧基官能团同时一步被引入到 QCA-COF 中。QCA-COF 中的羧基臂的主要 -取向通过粉末 X 射线衍射和总能量分析进行了推测。QCA-COF 在水中对水溶性有机污染物如罗丹明 B（255.7 mg/g）、亚甲蓝（306.1 mg/g）、庆大霉素（338.1 mg/g）和 2,4-二氯苯氧乙酸（294.1 mg/g）表现出优异的吸附能力。动力学吸附符合准二级模型，其吸附等温线符合朗缪尔模型。值得注意的是，QCA-COF 可以从实际水样中以高于 95%的去除效率和优异的循环性能捕获上述四种水溶性有机污染物。
