Tannin-based magnetic porous organic polymers as robust scavengers for methylene blue and lead ions
Tannin-based magnetic porous organic polymers as robust scavengers for methylene blue and lead ions
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DOI：
10.1016/j.jclepro.2019.01.040
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发表时间：
2019-04-01
影响因子：
11.1
通讯作者：
Hu, Shenghong
中科院分区：
文献类型：
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作者：
Huang, Lijin;Shuai, Qin;Hu, Shenghong
由于水资源受到人为污染的巨大威胁，有毒污染物治理的重要性日益显现。多孔有机聚合物是一种很有前途的污染物吸附剂。在本研究中，单宁基磁性多孔有机聚合物（TA-MOPs）的制备通过一个快速和可扩展的合成策略，以可持续的单宁酸作为积木通过偶氮偶联反应，而不牺牲任何酚羟基。在反应过程中，通过控制磁性纳米颗粒（MNP）的量，可以调节TA-MOPs的饱和磁化强度。由于TA-MOPs具有较高的比表面积（110.7m2·g-1）和丰富的酚羟基，其对亚甲基蓝（MB）和Pb 2+的吸附容量较大，吸附动力学较快。在10 min内达到吸附平衡，对MB和Pb 2+的最大吸附量分别为1696 mg g（-1）和252 mg g（-1）。此外，其优异的稳定性和超顺磁性使其具有优异的循环性能，可循环使用5次而性能没有明显下降，展示了TA-MOPS用于绿色环境治理的前景。(C)2019爱思唯尔有限公司版权所有。
Owing to the enormous threat from anthropogenic pollution in water resources, the importance of toxic contaminants treatments has become increasingly apparent. Porous organic polymers (POPs) are one kind of the most promising candidates as sorbents for the efficient removal of pollution. In the present study, tannin-based magnetic porous organic polymers (TA-MOPs) were fabricated through a rapid and scalable synthesis strategy by taking sustainable tannin acid as building blocks via azo coupling reaction without sacrificing any phenolic OH groups. The saturation magnetization of the TA-MOPs is tunable by controlling the amount of magnetic nanoparticles (MNPs) during the reaction process. Owing to its high special surface areas (110.7 m(2) g(-1)) and abundant phenolic OH groups, the as-synthesized TA-MOPs presented ultrahigh adsorption capacities, and fast adsorption kinetic for the isolation of methylene blue (MB) and Pb2+ from aqueous solutions. The adsorption equilibrium reached within 10 min and max adsorption amounts were 1696 mg g(-1) and 252 mg g(-1) for MB and Pb2+, respectively. Moreover, its excellent stability and superparamagnetism enable its excellent cycle performance, which can be recycled 5 times without a significant decrease in performance, demonstrating the promise of TA-MOPS for green environmental governance. (C) 2019 Elsevier Ltd. All rights reserved.