Zhang Xue, Cui Chunyue, Zheng Qingzhu, Wang Ying, Chang Jing, Wang Shuxian
Qingdao Engineering Research Center for Rural Environment, College of Resource and Environment, Qingdao Agricultural University, Qingdao City, 266109, Shandong Province, China.
Environ Sci Pollut Res Int. 2021 Jul;28(28):37424-37434. doi: 10.1007/s11356-021-13302-0. Epub 2021 Mar 13.
Nitrogen-doped carbon nanotubes (N-CNTs) were synthesized via a hydrothermal method and further modified with magnetic CoCuFeO nanoparticles following a one-pot solvothermal method. The characterization data show that the distribution of the magnetic materials and the adsorption characteristics of the CNTs can be tailored as a function of the N doping amount. The N-CNT adsorption isotherms as a function of N content and chlorophenol uptake show that a N doping level of 6% is optimum. After loading the N-CNTs with the magnetic CoCuFeO nanoparticles (M-N-CNTs), the resulting materials were easily dispersed in aqueous media with specific surface area reaching 95.64 m/g. The M-N-CNTs exhibit high affinities toward the adsorption of different chlorophenols following the order: Pentachlorophenol (PCP) > 2,4,6-trichlorophenol (2,4,6-TCP) > 2,4-dichlorophenol (2,4-DCP) > 2,4-dichlorophenoxyacetic acid (2,4-D) > phenol. Additionally, the M-N-CNTs exhibit good microwave absorption performance and can be regenerated by microwave irradiation with high efficiencies (> 90%) maintained with high stabilities.
通过水热法合成了氮掺杂碳纳米管（N-CNTs），并采用一锅溶剂热法用磁性CoCuFeO纳米颗粒对其进行进一步改性。表征数据表明，磁性材料的分布和碳纳米管的吸附特性可根据氮掺杂量进行调整。作为氮含量和氯酚吸附量函数的N-CNT吸附等温线表明，6%的氮掺杂水平是最佳的。在用磁性CoCuFeO纳米颗粒（M-N-CNTs）负载N-CNTs后，所得材料易于分散在水介质中，比表面积达到95.64 m/g。M-N-CNTs对不同氯酚的吸附表现出高亲和力，顺序为：五氯酚（PCP）>2,4,6-三氯酚（2,4,6-TCP）>2,4-二氯酚（2,4-DCP）>2,4-二氯苯氧乙酸（2,4-D）>苯酚。此外，M-N-CNTs表现出良好的微波吸收性能，并且可以通过微波辐照进行再生，保持高效率（>90%）和高稳定性。
