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Facile construction of Fe, N and P co-doped carbon spheres by carbothermal strategy for the adsorption and reduction of U(vi)

机译:通过Carbothotmal策略进行Fe,N和P共掺杂碳球的容易构建,用于吸附和减少U(VI)

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In this work, nitrogen and phosphorus co-doped magnetic carbon spheres encapsulating well-dispersed active Fe nanocrystals (Fe/P-CN) were fabricated via 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 ~(?1) , 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.
机译:在该作品中,通过简单的共聚物热解策略制造包封分散井的活性Fe纳米晶体(Fe / P-CN)的氮和磷共掺杂磁碳球。从杂原子中受益于掺杂,Fe / P-CN可以主要通过丰富的官能团吸附可溶性U(VI)离子,随后,通过Fe纳米晶体可以将吸附的U(VI)降低以不溶于U(IV)。在800℃(Fe / P-CN-800)下热解Fe / p-CN,优异的U(VI)去除容量为306.76mg g〜(α1),超过氮气和磷共掺杂碳球和纳米零 - 价色铁。此外,磁性分离和热再激活特性赋予Fe / P-CN-800具有优异的可重用性。特别是本研究提供了有前途的协同吸附和还原策略,以有效地使用掺原料复合材料去除U(VI)。

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