通过碳热策略简便构建铁、氮和磷共掺杂碳球用于吸附和还原U(VI)
Facile construction of Fe, N and P co-doped carbon spheres by carbothermal strategy for the adsorption and reduction of U(vi).
作者信息
Dong Zhimin, Zhang Zhibin, Zhou Runze, Dong Yayu, Wei Yuanyuan, Zheng Zhijian, Wang Youqun, Dai Ying, Cao Xiaohong, Liu Yunhai
机构信息
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 P. R. China.
出版信息
RSC Adv. 2020 Sep 21;10(57):34859-34868. doi: 10.1039/d0ra06252a. eCollection 2020 Sep 16.
In this work, nitrogen and phosphorus co-doped magnetic carbon spheres encapsulating well-dispersed active Fe nanocrystals (Fe/P-CN) were fabricated a simple copolymer pyrolysis strategy. Benefiting from heteroatoms doping, Fe/P-CN could primarily adsorb soluble U(vi) ions through abundant functional groups, and subsequently, the adsorbed U(vi) could be reduced to insoluble U(iv) by Fe nanocrystals. Fe/P-CN pyrolyzed at 800 °C (Fe/P-CN-800) exhibited excellent U(vi) removal capacity of 306.76 mg g, surpassing nitrogen and phosphorus co-doped carbon spheres and nano zero-valent iron. In addition, the magnetic separation and thermal reactivation properties endow Fe/P-CN-800 with excellent reusability. This research, especially, provides a promising synergistic adsorption and reduction strategy to effectively remove U(vi) using heteroatom-doped composites.
在本工作中，通过一种简单的共聚物热解策略制备了包裹着分散良好的活性铁纳米晶体的氮磷共掺杂磁性碳球（Fe/P-CN）。得益于杂原子掺杂，Fe/P-CN可通过丰富的官能团优先吸附可溶性U(VI)离子，随后，吸附的U(VI)可被铁纳米晶体还原为不溶性的U(IV)。在800℃热解的Fe/P-CN（Fe/P-CN-800）表现出306.76 mg g的优异U(VI)去除能力，超过了氮磷共掺杂碳球和纳米零价铁。此外，磁分离和热再活化性能赋予Fe/P-CN-800优异的可重复使用性。特别是，本研究提供了一种有前景的协同吸附和还原策略，以使用杂原子掺杂复合材料有效去除U(VI)。
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