Effective Adsorption of Uranyl Ions with Different MoS2-Exposed Surfaces in Aqueous Solution

Effective Adsorption of Uranyl Ions with Different MoS2-Exposed Surfaces in Aqueous Solution
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水溶液中不同MoS2暴露表面对铀酰离子的有效吸附

DOI:
10.1016/j.surfin.2019.100409
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发表时间:
2020-03
影响因子:
6.2
通讯作者:
Yunhai Liu
Yunhai Liu
中科院分区:
材料科学2区
文献类型:
--
作者:
Yuhui Liu;Cheng Fang;Shuang zhang;Weihong Zhong;Qianglin Wei;Yingcai Wang;Ying Dai;Youqun Wang;Zhibin Zhang;Yunhai Liu

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由于材料的内在结构会影响其性能,因此了解二维材料对放射性核素去除的影响是必不可少的。本文采用熔盐电解法制备了MoS 2纳米片和纳米花。从理论和实验两方面研究了U(VI)在MoS 2上的吸附行为。研究了MoS 2材料的吸附性能,包括吸附等温线、吸附动力学以及pH和温度的影响。批实验结果表明,MoS 2纳米片和纳米花对U(VI)的吸附容量分别为45.7和37.1 mg/g(298 K).计算结果表明,U(VI)在MoS 2上形成了稳定的配合物。有趣的是,钼基团可以通过U-S键显着提高结合能。因此,MoS 2材料在去除放射性废水中的铀酰离子方面具有潜在的应用价值。
An understanding of the impacts regarding on two-dimensional materials on radionuclide removal is indispensable, owing to the intrinsic structure of materials can affect its properties. In this work, MoS2nanosheets and nanoflowers were prepared by molten salt electrolysis method. The distinct adsorption behaviors of U(VI) on MoS2was theoretically and experimentally investigated. The adsorption properties of MoS2material including equilibrium isotherms, kinetics and effects of pH and temperature were explored. Batch experiments results show that MoS2nanosheets and nanoflowers achieved excellent U(VI) adsorption capacities, which were 45.7 and 37.1 mg/g at 298 K, respectively. According to the computational results, U(VI) have formed more stable complexes on MoS2. Interestingly, the molybdenum group could significantly improve the binding energy through U-S bond. Therefore, the MoS2material has potential applications in the elimination of uranyl ion from radioactive wastewater.
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